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Design and optimization of high-contrast gratings for multispectral VCSEL-SOI laser sources
I.S. Shashkin 1, M.I. Kondratov 1, A.E. Grishin 1, K.E. Pevchikh 2, S.O. Slipchenko 1, N.A. Pikhtin 1

1 Ioffe Institute, 194021, Russia, Saint-Petersburg, Politekhnicheskaya 26;
2 Joint Stock Company “Zelenograd Nanotechnology Center”,
124527, Russia, Moscow, Zelenograd, Solnechnaya alley 6, room IX, office 17

 PDF, 1180 kB

DOI: 10.18287/2412-6179-CO-1446

Pages: 535-541.

Full text of article: English language.

Abstract:
In the scope of a computational experiment, high-contrast gratings (HCG) formed on a silicon-on-insulator (SOI) platform within vertical-cavity surface-emitting lasers (VCSELs) were studied for multispectral laser sources. A simulation model for spectral characteristics calculation is proposed, which includes two heterogeneously integrated parts of the VCSEL: 1) the lower output mirror based on a HCG grating in the silicon layer of the SOI surrounded by air cavities to enhance the contrast of the HCG; 2) the semiconductor VCSEL structure with an air aperture for current and optical confinement. Comparative analysis results of the spectral characteristics of VCSEL-SOI structures for zeroth, first, and second-order modes, which can be excited in the air aperture of the VCSEL, are presented. It is demonstrated that the HCG, acting as one of the cavity mirrors, effectively discriminates the VCSEL higher-order modes. An algorithm for calculating HCG parameters that ensure the maximum reflectivity at a fixed thickness of the silicon layer of the SOI is developed.

Keywords:
high-contrast grating (HCG), HCG reflectivity for TE modes, vertical-cavity surface-emitting laser (VCSEL), silicon-on-insulator (SOI), heterogeneous integration.

Citation:
Shashkin IS, Kondratov MI, Grishin AE, Pevchikh KE, Slipchenko SO, Pikhtin NA. Design and optimization of high-contrast gratings for multispectral VCSEL-SOI laser sources. Computer Optics 2024; 48 (4): 535-541. DOI: 10.18287/2412-6179-CO-1446.

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