Mechanism of the polarization control in intracavity- contacted VCSEL with rhomboidal oxide current aperture

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Bobrov, M.A.^1 ; Maleev, N.A.^1 ; Blokhin, S.A.^1 ; Kuzmenkov, A.G.^1,2 ; Vasil'Ev, A.P.^1,2 ; Blokhin, A.A.^1 ; Kulagina, M.M.^1 ; Guseva, Yu A.^1 ; Troshkov, S.I.^1 ; Ustinov, V.M.^1,2,3

Ioffe Institute, Politekhnicheskaya 26, St. Petersburg

194021, Russia^1

Submicron Heterostructures for Microelectronics Research and Engineering Center of the RAS, St Petersburg, Russia^2

Peter the Great St. Petersburg Polytechnic University, St Petersburg, Russia^3

关键词: Current apertures;    Fundamental modes;    Intracavity-contacted;    Lasing emissions;    Orthogonal polarizations;    Polarization control;    Possible mechanisms;    Transverse optical;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012078/pdf
DOI  :  10.1088/1742-6596/741/1/012078

来源: IOP

【 摘 要 】

The possible mechanisms of the polarization control in single-mode intracavity- contacted vertical-cavity surface-emitting lasers (IC-VCSELs) with the rhomboidal selectively- oxidized current aperture were investigated. It was found that the lasing emission polarization of all single-mode VCSELs is fixed along the minor diagonal of the rhomboidal-shape aperture (the [1'10] direction). Numerical modelling of carrier transport did not reveal any sufficient injection anisotropy in the laser active region, while the transverse optical confinement factors calculated for the fundamental mode with two orthogonal polarizations are identical. Optical loss anisotropy and/or gain anisotropy are the most likely mechanisms of inducing the polarization fixation.