1. Electrically injected nonpolar GaN-based VCSELs with lattice-matched nanoporous distributed Bragg reflector mirrors
- Author
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Andrew Aragon, Daniel F. Feezell, Ting S. Luk, Saadat Mishkat-Ul-Masabih, and Morteza Monavarian
- Subjects
010302 applied physics ,Materials science ,Nanoporous ,business.industry ,Linear polarization ,General Engineering ,Physics::Optics ,General Physics and Astronomy ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,Distributed Bragg reflector ,Polarization (waves) ,01 natural sciences ,Light scattering ,law.invention ,Laser linewidth ,law ,0103 physical sciences ,Optoelectronics ,0210 nano-technology ,business ,Lasing threshold - Abstract
We demonstrate the first electrically injected nonpolar m-plane GaN-based vertical-cavity surface-emitting lasers (VCSELs) with lattice-matched nanoporous bottom DBRs. Lasing under pulsed operation at room temperature was observed near 409 nm with a linewidth of ~0.6 nm and a maximum output power of ~1.5 mW. The VCSELs were linearly polarized and polarization-locked in the a-direction, with a polarization ratio of 0.94. The high polarization ratio and polarization pinning reveal that the optical scattering from the nanoporous DBRs is negligible. A high characteristic temperature of 357 K resulted from the slightly negative offset between the peak gain and cavity mode wavelengths.
- Published
- 2019