%0 Journal Article %1 torrelli2025elliptical %A Torrelli, Valerio %A Miri, Lorenzo %A D’Alessandro, Martino %A Gullino, Alberto %A Zimmer, Michael %A Dahler, Katharina %A Jetter, Michael %A Michler, Peter %A Elsäßer, Wolfgang %A Bertazzi, Francesco %A Tibaldi, Alberto %A Debernardi, Pierluigi %D 2025 %J Optics Letters %K ihfg %N 9 %P 3082-3085 %R 10.1364/OL.557703 %T Elliptical polarization in VCSELs via joint interaction of a tilted sub-wavelength grating and intrinsic semiconductor anisotropies %U https://opg.optica.org/ol/abstract.cfm?uri=ol-50-9-3082 %V 50 %X We demonstrate numerically and experimentally that, in vertical-cavity surface-emitting lasers (VCSELs), a non-chiral cavity can be converted into a chiral one by the interaction between a sub-wavelength grating tilted with respect to the crystalline axes and the intrinsic semiconductor optical anisotropies, thus enabling the emission of elliptically polarized light. The measured Stokes parameters of such a VCSEL, realized by a standard grating based VCSEL fabricati on process, are in line with the modeling results. We demonstrate through simulations that a degree of circular polarization of 0.9 can be obtained by varying the grating parameters. The full Poincaré sphere is accessible on demand if mechanical strain is also considered.

@article{torrelli2025elliptical, abstract = {We demonstrate numerically and experimentally that, in vertical-cavity surface-emitting lasers (VCSELs), a non-chiral cavity can be converted into a chiral one by the interaction between a sub-wavelength grating tilted with respect to the crystalline axes and the intrinsic semiconductor optical anisotropies, thus enabling the emission of elliptically polarized light. The measured Stokes parameters of such a VCSEL, realized by a standard grating based VCSEL fabricati on process, are in line with the modeling results. We demonstrate through simulations that a degree of circular polarization of 0.9 can be obtained by varying the grating parameters. The full Poincaré sphere is accessible on demand if mechanical strain is also considered.}, added-at = {2025-05-08T10:26:52.000+0200}, author = {Torrelli, Valerio and Miri, Lorenzo and D’Alessandro, Martino and Gullino, Alberto and Zimmer, Michael and Dahler, Katharina and Jetter, Michael and Michler, Peter and Elsäßer, Wolfgang and Bertazzi, Francesco and Tibaldi, Alberto and Debernardi, Pierluigi}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/25908f548753adfd115c4d3661b76c015/ihfgpuma}, doi = {10.1364/OL.557703}, interhash = {d01f552f768c5641ac60f5a80440fcad}, intrahash = {5908f548753adfd115c4d3661b76c015}, journal = {Optics Letters}, keywords = {ihfg}, language = {engl}, month = may, number = 9, pages = {3082-3085}, timestamp = {2025-05-08T10:34:04.000+0200}, title = {Elliptical polarization in VCSELs via joint interaction of a tilted sub-wavelength grating and intrinsic semiconductor anisotropies }, url = {https://opg.optica.org/ol/abstract.cfm?uri=ol-50-9-3082}, volume = 50, year = 2025 }