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Subwavelength Grating-Mirror VCSEL With a Thin Oxide Gap

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4 Author(s)
II-Sung Chung ; Tech. Univ. of Denmark, Lyngby ; Jesper Mork ; Philippe Gilet ; Alexei Chelnokov

A new vertical-cavity surface-emitting laser (VCSEL) structure based on a subwavelength grating mirror and a thin oxide gap is suggested and numerically investigated. The structure is shown to exhibit similar threshold gain, suppression of higher order transverse modes, and polarization stability as a grating-mirror VCSEL reported in the literature based on a thick air gap. The thin oxide gap structure has a number of advantages including easier fabrication, better mechanical stability, and very strong single-mode properties.

Published in:

IEEE Photonics Technology Letters  (Volume:20 ,  Issue: 2 )