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Express","publisher":"Optica Publishing Group", "year": "2023", "url": "https://opg.optica.org/oe/abstract.cfm?URI=oe-31-24-40687", "author": [ "Florian Bienert","Christoph Röcker","Tom Dietrich","Thomas Graf","Marwan Abdou Ahmed" ], "authors": [ {"first" : "Florian", "last" : "Bienert"}, {"first" : "Christoph", "last" : "Röcker"}, {"first" : "Tom", "last" : "Dietrich"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Marwan", "last" : "Abdou Ahmed"} ], "volume": "31","number": "24","pages": "40687--40704","abstract": "We present a comprehensive simulative and experimental investigation of how period-chirped pulse compression gratings affect the compressed pulses. A specifically developed ray-tracing tool was used for the simulative investigations. It is shown that the chirp creates a characteristic spatio-spectral error pattern, which leads to a degradation of the beam quality and an increase of the pulse duration. The experimental investigations, for which both a narrow-bandwidth continuous-wave and a pulsed laser beam were guided through a Treacy-compressor comprised of period-chirped gratings, confirm the simulation results and present methods on how to identify the chirp's characteristic error pattern in practice.", "language" : "english", "doi" : "10.1364/OE.505875", "bibtexKey": "Bienert.23.Detrimental" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2351d23d83d82758f9f2b4a880651d5ac/ifsw", "tags" : [ "myown","chirp","diffraction","peer","interference","diffraction_grating","from:florianbienert" ], "intraHash" : "351d23d83d82758f9f2b4a880651d5ac", "interHash" : "7b7d90ef08e1e7c7c007e0771e7ba3b2", "label" : "Simple spatially resolved period measurement of chirped pulse compression gratings", "user" : "ifsw", "description" : "", "date" : "2023-06-03 15:24:54", "changeDate" : "2023-06-03 15:25:40", "count" : 1, "pub-type": "article", "journal": "Opt. Express","publisher":"Optica Publishing Group", "year": "2023", "url": "https://opg.optica.org/oe/abstract.cfm?URI=oe-31-12-19392", "author": [ "Florian Bienert","Christoph Röcker","Thomas Graf","Marwan Abdou Ahmed" ], "authors": [ {"first" : "Florian", "last" : "Bienert"}, {"first" : "Christoph", "last" : "Röcker"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Marwan Abdou", "last" : "Ahmed"} ], "volume": "31","number": "12","pages": "19392--19403","abstract": "We present an easy-to-implement and low-cost setup for the precise measurement of the period chirp of diffraction gratings offering a resolution of 15 pm and reasonable scan speeds of 2 seconds per measurement point. The principle of the measurement is illustrated on the example of two different pulse compression gratings, one fabricated by laser interference lithography (LIL) and the other by scanning beam interference lithography (SBIL). A period chirp of 0.22 pm/mm2 at a nominal period of 610 nm was measured for the grating fabricated with LIL, whereas no chirp was observed for the grating fabricated by SBIL, which had a nominal period of 586.2 nm.", "doi" : "10.1364/OE.489238", "bibtexKey": "Bienert:23" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2a8492260592f80e99852d85b3cde1c6f/florianbienert", "tags" : [ "chirp","diffraction","diffraction_grating","interference","myown","peer" ], "intraHash" : "a8492260592f80e99852d85b3cde1c6f", "interHash" : "9a3e04001920d37b1994c5ed9ba327b8", "label" : "General mathematical model for the period chirp in interference lithography", "user" : "florianbienert", "description" : "", "date" : "2023-02-13 10:25:03", "changeDate" : "2023-02-13 09:30:32", "count" : 3, "pub-type": "article", "journal": "Opt. Express","publisher":"Optica Publishing Group", "year": "2023", "url": "https://opg.optica.org/oe/abstract.cfm?URI=oe-31-4-5334", "author": [ "Florian Bienert","Thomas Graf","Marwan Abdou Ahmed" ], "authors": [ {"first" : "Florian", "last" : "Bienert"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Marwan Abdou", "last" : "Ahmed"} ], "volume": "31","number": "4","pages": "5334--5346","abstract": "We present a general analytical model for the calculation of the spatial distribution of the grating period, enabling the unification of all configurations of classical laser interference lithography (LIL) and scanning-beam interference lithography (SBIL) into one formalism. This is possible due to the consideration of Gaussian beams instead of point sources which allow for the accurate description of not only the laser&\\#x2019;s far-field but also its near-field. The proposed model enables the calculation of the grating period, the inclination and the slant of the grating lines on arbitrarily shaped substrates, originating from the interference of arbitrarily orientated and positioned Gaussian beams.", "doi" : "10.1364/OE.481887", "bibtexKey": "Bienert:23" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2a8492260592f80e99852d85b3cde1c6f/ifsw", "tags" : [ "myown","chirp","period","Interference","diffraction","Laser-Interference-Lithography","diffraction_grating","shaping","from:florianbienert","mathematical","Beam","peer","Laser","beams","gratings","interference","model","Gaussian","Holographic","Scanning-Beam-Interference-Lithography" ], "intraHash" : "a8492260592f80e99852d85b3cde1c6f", "interHash" : "9a3e04001920d37b1994c5ed9ba327b8", "label" : "General mathematical model for the period chirp in interference lithography", "user" : "ifsw", "description" : "", "date" : "2023-02-13 10:24:21", "changeDate" : "2023-02-13 09:30:48", "count" : 3, "pub-type": "article", "journal": "Opt. Express","publisher":"Optica Publishing Group", "year": "2023", "url": "https://opg.optica.org/oe/abstract.cfm?URI=oe-31-4-5334", "author": [ "Florian Bienert","Thomas Graf","Marwan Abdou Ahmed" ], "authors": [ {"first" : "Florian", "last" : "Bienert"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Marwan Abdou", "last" : "Ahmed"} ], "volume": "31","number": "4","pages": "5334--5346","abstract": "We present a general analytical model for the calculation of the spatial distribution of the grating period, enabling the unification of all configurations of classical laser interference lithography (LIL) and scanning-beam interference lithography (SBIL) into one formalism. This is possible due to the consideration of Gaussian beams instead of point sources which allow for the accurate description of not only the laser&\\#x2019;s far-field but also its near-field. The proposed model enables the calculation of the grating period, the inclination and the slant of the grating lines on arbitrarily shaped substrates, originating from the interference of arbitrarily orientated and positioned Gaussian beams.", "doi" : "10.1364/OE.481887", "bibtexKey": "Bienert:23" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/28369a5b0b9c1d5b9bd78f25cc22c6d13/florianbienert", "tags" : [ "LIL","algorithm","chirp","diffraction","diffraction_grating","grating","interference","interference_lithography","myown","peer","therory" ], "intraHash" : "8369a5b0b9c1d5b9bd78f25cc22c6d13", "interHash" : "503e2f12069fc6f23a499ccd4bb69f64", "label" : "Theoretical investigation on the elimination of the period chirp by deliberate substrate deformations", "user" : "florianbienert", "description" : "", "date" : "2022-06-09 10:04:50", "changeDate" : "2022-06-09 08:04:50", "count" : 3, "pub-type": "article", "journal": "Optics Express","publisher":"Optica Publishing Group", "year": "2022", "url": "https://doi.org/10.1364%2Foe.458636", "author": [ "Florian Bienert","Thomas Graf","Marwan Abdou Ahmed" ], "authors": [ {"first" : "Florian", "last" : "Bienert"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Marwan", "last" : "Abdou Ahmed"} ], "volume": "30","number": "13","pages": "22410","abstract": "We present a theoretical investigation on the approach of deliberately bending the substrate during the exposure within laser interference lithography to compensate for the period chirp. It is shown that the yet undiscovered function of the surface geometry, necessary to achieve the zero-chirp case (i.e. having a perfectly constant period over the whole substrate) is determined by a first-order differential equation. As the direct analytical solution of this differential equation is difficult, a numerical approach is developed, based on the optimization of pre-defined functions towards the unknown analytical solution of the differential equation by means of a Nelder-Mead simplex algorithm. By applying this method to a concrete example, we show that an off-center placement of the substrate with respect to the point sources is advantageous both in terms of achievable period and substrate curvature and that a fourth-order polynomial can greatly satisfy the differential equation leading to a root-mean-square deviation of only 1.4 pm with respect to the targeted period of 610\u2005nm.", "doi" : "10.1364/oe.458636", "bibtexKey": "Bienert_2022" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/28369a5b0b9c1d5b9bd78f25cc22c6d13/ifsw", "tags" : [ "myown","chirp","diffraction","diffraction_grating","interference_lithography","LIL","from:florianbienert","grating","peer","interference","therory","algorithm" ], "intraHash" : "8369a5b0b9c1d5b9bd78f25cc22c6d13", "interHash" : "503e2f12069fc6f23a499ccd4bb69f64", "label" : "Theoretical investigation on the elimination of the period chirp by deliberate substrate deformations", "user" : "ifsw", "description" : "", "date" : "2022-06-09 10:04:50", "changeDate" : "2022-06-09 08:04:50", "count" : 3, "pub-type": "article", "journal": "Optics Express","publisher":"Optica Publishing Group", "year": "2022", "url": "https://doi.org/10.1364%2Foe.458636", "author": [ "Florian Bienert","Thomas Graf","Marwan Abdou Ahmed" ], "authors": [ {"first" : "Florian", "last" : "Bienert"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Marwan", "last" : "Abdou Ahmed"} ], "volume": "30","number": "13","pages": "22410","abstract": "We present a theoretical investigation on the approach of deliberately bending the substrate during the exposure within laser interference lithography to compensate for the period chirp. It is shown that the yet undiscovered function of the surface geometry, necessary to achieve the zero-chirp case (i.e. having a perfectly constant period over the whole substrate) is determined by a first-order differential equation. As the direct analytical solution of this differential equation is difficult, a numerical approach is developed, based on the optimization of pre-defined functions towards the unknown analytical solution of the differential equation by means of a Nelder-Mead simplex algorithm. By applying this method to a concrete example, we show that an off-center placement of the substrate with respect to the point sources is advantageous both in terms of achievable period and substrate curvature and that a fourth-order polynomial can greatly satisfy the differential equation leading to a root-mean-square deviation of only 1.4 pm with respect to the targeted period of 610\u2005nm.", "doi" : "10.1364/oe.458636", "bibtexKey": "Bienert_2022" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2c92c0beab91cf22a13ce0cb2209438b6/ifsw", "tags" : [ "chirp","period","Interference","diffraction_grating","Laser_beam","ltihography","interference_lithography","from:florianbienert","ifsw","Diffraction","grating" ], "intraHash" : "c92c0beab91cf22a13ce0cb2209438b6", "interHash" : "1ecc9d05102c7ed5274b48e382dbbf69", "label" : "Comprehensive theoretical analysis of the period chirp in laser interference lithography", "user" : "ifsw", "description" : "", "date" : "2022-03-17 14:03:13", "changeDate" : "2022-03-17 13:03:13", "count" : 2, "pub-type": "article", "journal": "Appl. Opt.","publisher":"OSA", "year": "2022", "url": "http://opg.optica.org/ao/abstract.cfm?URI=ao-61-9-2313", "author": [ "Florian Bienert","Thomas Graf","Marwan Abdou Ahmed" ], "authors": [ {"first" : "Florian", "last" : "Bienert"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Marwan", "last" : "Abdou Ahmed"} ], "volume": "61","number": "9","pages": "2313--2326","abstract": "We present a theoretical investigation on laser interference lithography used for the exposure of linear gratings. The focus is on the geometry of the arising interference lines on the substrate, in particular on their period and orientation, depending on the illumination geometry as determined by the setup. The common approach with point sources emitting spherical wavefronts is considered for the illumination. Three different cases are discussed, namely the interference between two point sources with either two convex, two concave or mixed, i.e., convex and concave wavefronts. General equations focusing mainly on the calculation of the period and the orientation of the grating lines are derived for each of the three exposure cases considering arbitrarily positioned point sources and arbitrarily shaped substrates. Additionally, the interference of symmetrically positioned point sources illuminating plane substrates is investigated, as these boundary conditions significantly simplify the derived equations.", "doi" : "10.1364/AO.451873", "bibtexKey": "Bienert:22" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2c92c0beab91cf22a13ce0cb2209438b6/florianbienert", "tags" : [ "Diffraction","Interference","Laser_beam","chirp","diffraction_grating","grating","ifsw","interference_lithography","ltihography","period" ], "intraHash" : "c92c0beab91cf22a13ce0cb2209438b6", "interHash" : "1ecc9d05102c7ed5274b48e382dbbf69", "label" : "Comprehensive theoretical analysis of the period chirp in laser interference lithography", "user" : "florianbienert", "description" : "", "date" : "2022-03-17 13:51:15", "changeDate" : "2022-03-17 13:03:13", "count" : 2, "pub-type": "article", "journal": "Appl. Opt.","publisher":"OSA", "year": "2022", "url": "http://opg.optica.org/ao/abstract.cfm?URI=ao-61-9-2313", "author": [ "Florian Bienert","Thomas Graf","Marwan Abdou Ahmed" ], "authors": [ {"first" : "Florian", "last" : "Bienert"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Marwan", "last" : "Abdou Ahmed"} ], "volume": "61","number": "9","pages": "2313--2326","abstract": "We present a theoretical investigation on laser interference lithography used for the exposure of linear gratings. The focus is on the geometry of the arising interference lines on the substrate, in particular on their period and orientation, depending on the illumination geometry as determined by the setup. The common approach with point sources emitting spherical wavefronts is considered for the illumination. Three different cases are discussed, namely the interference between two point sources with either two convex, two concave or mixed, i.e., convex and concave wavefronts. General equations focusing mainly on the calculation of the period and the orientation of the grating lines are derived for each of the three exposure cases considering arbitrarily positioned point sources and arbitrarily shaped substrates. Additionally, the interference of symmetrically positioned point sources illuminating plane substrates is investigated, as these boundary conditions significantly simplify the derived equations.", "doi" : "10.1364/AO.451873", "bibtexKey": "Bienert:22" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2ee04853ef602f9e6498e619a0a82695f/iis", "tags" : [ "Sigma","interference","Delta","modulators","suppressions","from:jens.anders" ], "intraHash" : "ee04853ef602f9e6498e619a0a82695f", "interHash" : "1d71069e6d784d4b42e66ddad70b248a", "label" : "Digital interferer suppression and jitter reduction in continuous-time bandpass ΣΔ modulators", "user" : "iis", "description" : "", "date" : "2020-10-12 15:58:37", "changeDate" : "2020-10-12 13:58:37", "count" : 3, "pub-type": "inproceedings", "booktitle": "2017 IEEE International Symposium on Circuits and Systems (ISCAS)", "year": "2017", "url": "https://ieeexplore.ieee.org/document/8050482/", "author": [ "J. Chi","J. Wagner","J. Anders","M. Ortmanns" ], "authors": [ {"first" : "J.", "last" : "Chi"}, {"first" : "J.", "last" : "Wagner"}, {"first" : "J.", "last" : "Anders"}, {"first" : "M.", "last" : "Ortmanns"} ], "pages": "1-4","abstract": "Clock jitter sensitivity is a well-known drawback of continuous-time ΣΔ modulators. Although there exist various methods to alleviate the jitter influence, most are only effective in reducing noise incurred by out-of-band quantization noise. However, due to the steadily increasing signal frequency in receiver applications, the dominant jitter influence rather originates from the mixing between the close to in-band interferers and the close-in clock phase noise, either in a mixer or in the DAC of a bandpass ΣΔ modulator. This mixing results in additional in-band noise which cannot be reduced by existing solutions. In this paper, we use a reconfigurable digital filtering method for close to in-band interferer suppression in bandpass ΣΔ modulators, and demonstrate its effectiveness in improving phase noise tolerance through simulation. Additionally, a technique to simplify the implementation of the digital filters is proposed.", "issn" : "2379-447X", "doi" : "10.1109/ISCAS.2017.8050482", "bibtexKey": "8050482" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2ee04853ef602f9e6498e619a0a82695f/jens.anders", "tags" : [ "Delta","Sigma","interference","modulators","suppressions" ], "intraHash" : "ee04853ef602f9e6498e619a0a82695f", "interHash" : "1d71069e6d784d4b42e66ddad70b248a", "label" : "Digital interferer suppression and jitter reduction in continuous-time bandpass ΣΔ modulators", "user" : "jens.anders", "description" : "", "date" : "2020-10-11 09:45:32", "changeDate" : "2020-10-12 13:58:37", "count" : 3, "pub-type": "inproceedings", "booktitle": "2017 IEEE International Symposium on Circuits and Systems (ISCAS)", "year": "2017", "url": "https://ieeexplore.ieee.org/document/8050482/", "author": [ "J. Chi","J. Wagner","J. Anders","M. Ortmanns" ], "authors": [ {"first" : "J.", "last" : "Chi"}, {"first" : "J.", "last" : "Wagner"}, {"first" : "J.", "last" : "Anders"}, {"first" : "M.", "last" : "Ortmanns"} ], "pages": "1-4","abstract": "Clock jitter sensitivity is a well-known drawback of continuous-time ΣΔ modulators. Although there exist various methods to alleviate the jitter influence, most are only effective in reducing noise incurred by out-of-band quantization noise. However, due to the steadily increasing signal frequency in receiver applications, the dominant jitter influence rather originates from the mixing between the close to in-band interferers and the close-in clock phase noise, either in a mixer or in the DAC of a bandpass ΣΔ modulator. This mixing results in additional in-band noise which cannot be reduced by existing solutions. In this paper, we use a reconfigurable digital filtering method for close to in-band interferer suppression in bandpass ΣΔ modulators, and demonstrate its effectiveness in improving phase noise tolerance through simulation. Additionally, a technique to simplify the implementation of the digital filters is proposed.", "issn" : "2379-447X", "doi" : "10.1109/ISCAS.2017.8050482", "bibtexKey": "8050482" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2dd7f39693347ef7f245a75e36ca30bf3/ifsw", "tags" : [ "Absorption","Capillary","Diffraction","Interference","Laser","RayTracing","from:peterberger","peer" ], "intraHash" : "dd7f39693347ef7f245a75e36ca30bf3", "interHash" : "5a24b4ea225435ba422eab757dcd2b06", "label" : "Comparison between ray-tracing and physical optics for the computation of light absorption in capillaries -- the influence of diffraction and interference", "user" : "ifsw", "description" : "", "date" : "2020-02-25 17:30:48", "changeDate" : "2020-02-25 16:44:32", "count" : 2, "pub-type": "article", "journal": "Opt. Express","publisher":"OSA", "year": "2012", "url": "http://www.opticsexpress.org/abstract.cfm?URI=oe-20-24-26606", "author": [ "Yuan Qin","Andreas Michalowski","Rudolf Weber","Sen Yang","Thomas Graf","Xiaowu Ni" ], "authors": [ {"first" : "Yuan", "last" : "Qin"}, {"first" : "Andreas", "last" : "Michalowski"}, {"first" : "Rudolf", "last" : "Weber"}, {"first" : "Sen", "last" : "Yang"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Xiaowu", "last" : "Ni"} ], "volume": "20","number": "24","pages": "26606--26617","abstract": "Ray-tracing is the commonly used technique to calculate the absorption of light in laser deep-penetration welding or drilling. Since new lasers with high brilliance enable small capillaries with high aspect ratios, diffraction might become important. To examine the applicability of the ray-tracing method, we studied the total absorptance and the absorbed intensity of polarized beams in several capillary geometries. The ray-tracing results are compared with more sophisticated simulations based on physical optics. The comparison shows that the simple ray-tracing is applicable to calculate the total absorptance in triangular grooves and in conical capillaries but not in rectangular grooves. To calculate the distribution of the absorbed intensity ray-tracing fails due to the neglected interference, diffraction, and the effects of beam propagation in the capillaries with sub-wavelength diameter. If diffraction is avoided e.g. with beams smaller than the entrance pupil of the capillary or with very shallow capillaries, the distribution of the absorbed intensity calculated by ray-tracing corresponds to the local average of the interference pattern found by physical optics.", "doi" : "10.1364/OE.20.026606", "bibtexKey": "Qin.2012.Comparison" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2dd7f39693347ef7f245a75e36ca30bf3/peterberger", "tags" : [ "Absorption","Capillary","Diffraction","Interference","Laser","RayTracing" ], "intraHash" : "dd7f39693347ef7f245a75e36ca30bf3", "interHash" : "5a24b4ea225435ba422eab757dcd2b06", "label" : "Comparison between ray-tracing and physical optics for the computation of light absorption in capillaries -- the influence of diffraction and interference", "user" : "peterberger", "description" : "", "date" : "2020-02-25 17:30:48", "changeDate" : "2020-02-25 16:30:48", "count" : 2, "pub-type": "article", "journal": "Opt. Express","publisher":"OSA", "year": "2012", "url": "http://www.opticsexpress.org/abstract.cfm?URI=oe-20-24-26606", "author": [ "Yuan Qin","Andreas Michalowski","Rudolf Weber","Sen Yang","Thomas Graf","Xiaowu Ni" ], "authors": [ {"first" : "Yuan", "last" : "Qin"}, {"first" : "Andreas", "last" : "Michalowski"}, {"first" : "Rudolf", "last" : "Weber"}, {"first" : "Sen", "last" : "Yang"}, {"first" : "Thomas", "last" : "Graf"}, {"first" : "Xiaowu", "last" : "Ni"} ], "volume": "20","number": "24","pages": "26606--26617","abstract": "Ray-tracing is the commonly used technique to calculate the absorption of light in laser deep-penetration welding or drilling. Since new lasers with high brilliance enable small capillaries with high aspect ratios, diffraction might become important. To examine the applicability of the ray-tracing method, we studied the total absorptance and the absorbed intensity of polarized beams in several capillary geometries. The ray-tracing results are compared with more sophisticated simulations based on physical optics. The comparison shows that the simple ray-tracing is applicable to calculate the total absorptance in triangular grooves and in conical capillaries but not in rectangular grooves. To calculate the distribution of the absorbed intensity ray-tracing fails due to the neglected interference, diffraction, and the effects of beam propagation in the capillaries with sub-wavelength diameter. If diffraction is avoided e.g. with beams smaller than the entrance pupil of the capillary or with very shallow capillaries, the distribution of the absorbed intensity calculated by ray-tracing corresponds to the local average of the interference pattern found by physical optics.", "doi" : "10.1364/OE.20.026606", "bibtexKey": "Qin.2012.Comparison" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2e745ec0fcb3c83ddf34d5b2e9fb7b467/chrisvwr", "tags" : [ "emitter","photon","quantum","interference" ], "intraHash" : "e745ec0fcb3c83ddf34d5b2e9fb7b467", "interHash" : "10c9b268de52af05e9ee9c12dae81a91", "label" : "Overcoming correlation fluctuations in two-photon interference experiments with differently bright and independently blinking remote quantum emitters", "user" : "chrisvwr", "description" : "Phys. Rev. B 97, 195414 (2018) - Overcoming correlation fluctuations in two-photon interference experiments with differently bright and independently blinking remote quantum emitters", "date" : "2019-02-25 13:42:53", "changeDate" : "2019-02-25 12:42:53", "count" : 2, "pub-type": "article", "journal": "Phys. Rev. B","publisher":"American Physical Society", "year": "2018", "url": "https://link.aps.org/doi/10.1103/PhysRevB.97.195414", "author": [ "Jonas H. Weber","Jan Kettler","Hüseyin Vural","Markus Müller","Julian Maisch","Michael Jetter","Simone L. Portalupi","Peter Michler" ], "authors": [ {"first" : "Jonas H.", "last" : "Weber"}, {"first" : "Jan", "last" : "Kettler"}, {"first" : "Hüseyin", "last" : "Vural"}, {"first" : "Markus", "last" : "Müller"}, {"first" : "Julian", "last" : "Maisch"}, {"first" : "Michael", "last" : "Jetter"}, {"first" : "Simone L.", "last" : "Portalupi"}, {"first" : "Peter", "last" : "Michler"} ], "volume": "97","number": "19","pages": "195414", "numpages" : "6", "doi" : "10.1103/PhysRevB.97.195414", "bibtexKey": "PhysRevB.97.195414" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/25f855b09c182db8d1d622b29bd894977/hermann", "tags" : [ "absorber;","fabrication;","hydrogen","interference","large-area","laser","lithography}","perfect","sensing;","{plasmonics;" ], "intraHash" : "5f855b09c182db8d1d622b29bd894977", "interHash" : "d49832265ecb331c24409bfee4fdd23c", "label" : "Large-Area Low-Cost Plasmonic Perfect Absorber Chemical Sensor\n Fabricated by Laser Interference Lithography", "user" : "hermann", "description" : "", "date" : "2017-05-18 11:32:12", "changeDate" : "2017-05-18 09:32:12", "count" : 2, "pub-type": "article", "journal": "ACS SENSORS","publisher":"AMER CHEMICAL SOC","address":"1155 16TH ST, NW, WASHINGTON, DC 20036 USA", "year": "{2016}", "url": "", "author": [ "Shahin Bagheri","Nikolai Strohfeldt","Florian Sterl","Audrey Berrier","Andreas Tittl","Harald Giessen" ], "authors": [ {"first" : "Shahin", "last" : "Bagheri"}, {"first" : "Nikolai", "last" : "Strohfeldt"}, {"first" : "Florian", "last" : "Sterl"}, {"first" : "Audrey", "last" : "Berrier"}, {"first" : "Andreas", "last" : "Tittl"}, {"first" : "Harald", "last" : "Giessen"} ], "volume": "1","number": "9","pages": "1148-1154","abstract": "We employ laser interference lithography as a reliable and low-cost\n fabrication method to create nanowire and nanosquare arrays in\n photopolymers for manufacturing plasmonic perfect absorber sensors over\n homogeneous areas as large as 5.7 cm(2). Subsequently, we transfer the\n fabricated patterns into a palladium layer by using argon ion beam\n etching. Geometry and periodicity of our large-area metallic\n nanostructures are precisely controlled by adjusting the interference\n conditions during single- and double-exposure processes, resulting in\n active nanostructures over large areas with spectrally selective perfect\n absorption of light from the visible to the near-infrared wavelength\n range. In addition, we demonstrate the method's applicability for\n hydrogen detection schemes by measuring the hydrogen sensing performance\n of our polarization independent palladium-based perfect absorbers. Since\n palladium changes its optical and structural properties reversibly upon\n hydrogenation, exposure of the sample to hydrogen causes distinct and\n reversible changes within seconds in the absorption of light, which are\n easily measured by standard microscopic tools. The fabricated large-area\n perfect absorber sensors provide nearly perfect absorption of light at\n 730 and 950 nm, respectively, and absolute reflectance changes from\n below 1\\% to above 4\\% in the presence of hydrogen. This translates to a\n relative signal change of almost 400\\%. The large-area and fast\n manufacturing process makes our approach highly attractive for simple\n and low-cost sensor fabrication, and therefore, suitable for industrial\n production of plasmonic devices in the near future.", "author-email" : "h.giessen@pi4.uni-stuttgart.de", "issn" : "2379-3694", "keywords-plus" : "NANOANTENNA ARRAYS; LIGHT-ABSORPTION; THIN-FILMS; HYDROGEN;\n SPECTROSCOPY; RESONANCE; NANOSTRUCTURES; METAMATERIALS; NANOPARTICLES;\n ENHANCEMENT", "funding-acknowledgement" : "ERC Advanced Grant COMPLEXPLAS; DFG; BMBF; Zeiss foundation; MWK\n Baden-Wurttemberg; Baden-Wurttemberg Stiftung", "research-areas" : "Chemistry; Science & Technology - Other Topics", "number-of-cited-references" : "45", "affiliation" : "Giessen, H (Reprint Author), Univ Stuttgart, Inst Phys 4, D-70569 Stuttgart, Germany.\n Giessen, H (Reprint Author), Univ Stuttgart, Res Ctr SCoPE, D-70569 Stuttgart, Germany.\n Bagheri, Shahin; Strohfeldt, Nikolai; Sterl, Florian; Tittl, Andreas; Giessen, Harald, Univ Stuttgart, Inst Phys 4, D-70569 Stuttgart, Germany.\n Bagheri, Shahin; Strohfeldt, Nikolai; Sterl, Florian; Berrier, Audrey; Tittl, Andreas; Giessen, Harald, Univ Stuttgart, Res Ctr SCoPE, D-70569 Stuttgart, Germany.\n Berrier, Audrey, Univ Stuttgart, Inst Phys 1, D-70569 Stuttgart, Germany.\n Tittl, Andreas, Ecole Polytech Fed Lausanne, Inst Bioengn, CH-1015 Lausanne, Switzerland.", "web-of-science-categories" : "Chemistry, Multidisciplinary; Nanoscience & Nanotechnology", "language" : "English", "funding-text" : "The authors gratefully acknowledge financial support by ERC Advanced\n Grant COMPLEXPLAS as well as DFG, BMBF, Zeiss foundation, MWK\n Baden-Wurttemberg, and the Baden-Wurttemberg Stiftung. The authors also\n thank Dominik Floess for sample photography and Martin Schaferling for\n the assistance in S-matrix simulation.", "times-cited" : "0", "doi" : "10.1021/acssensors.6b00444", "bibtexKey": "ISI:000385465500011" } ] }