Monolithic high-index contrast grating mirror for a GaN-based vertical-cavity surface-emitting laser
Artikel i vetenskaplig tidskrift, 2021

In this paper, a pulsed electrically pumped GaN-based vertical-cavity surface-emitting laser (VCSEL) with one dielectric distributed Bragg reflector and one n-GaN monolithic high-index contrast grating (MHCG) mirror was demonstrated at room temperature. The reflectance of the n-GaN MHCG and cavity mode behaviors of the VCSEL with MHCG for varying n-GaN thickness, MHCG pattern diameter, and current aperture size were numerically investigated. Measured characteristics of the fabricated device showed that the lasing action started at an injection current of 10.2 mA, corresponding to a current density of about 15.1 kA=cm2. Above threshold, the measured slope efficiency was 6.2 × 10−3 W∕A, and the output power was 0.13 mW at 30 mA. Moreover, the measured lasing peak occurring at 403.4 nm and the longitudinal mode spacing of 5.6 nm were in good agreement with simulations. The incorporation of an n-GaN MHCG mirror not only greatly simplified the fabrication but also substantially improved the lasing characteristics in comparison to the previous work applying TiO2 HCG mirrors.

Författare

Kuo Bin Hong

National Yang Ming Chiao Tung University

Tsu Chi Chang

National Yang Ming Chiao Tung University

Filip Hjort

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Niclas Lindvall

Chalmers, Mikroteknologi och nanovetenskap (MC2), Nanotekniklaboratoriet

Wen Hsuan Hsieh

National Yang Ming Chiao Tung University

Wei Hao Huang

National Yang Ming Chiao Tung University

Po Hsun Tsai

National Yang Ming Chiao Tung University

Tomasz Czyszanowski

Politechnika Lodzka

Åsa Haglund

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Tien Chang Lu

National Yang Ming Chiao Tung University

Photonics Research

2327-9125 (ISSN)

Vol. 9 11 2214-2221

Ämneskategorier

Annan fysik

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1364/PRJ.437911

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Senast uppdaterat

2021-11-08