Monolithic high-index contrast grating mirror for a GaN-based vertical-cavity surface-emitting laser
| Autor: | Kuo-Bin Hong, Filip Hjort, Tomasz Czyszanowski, Tien-Chang Lu, Niclas Lindvall, Wen Hsuan Hsieh, Wei Hao Huang, Tsu Chi Chang, Åsa Haglund, Po Hsun Tsai |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Slope efficiency 02 engineering and technology Grating 021001 nanoscience & nanotechnology Distributed Bragg reflector Laser 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Vertical-cavity surface-emitting laser 010309 optics Longitudinal mode law 0103 physical sciences Optoelectronics 0210 nano-technology business Current density Lasing threshold |
| Zdroj: | Photonics Research. 9:2214 |
| ISSN: | 2327-9125 |
| DOI: | 10.1364/prj.437911 |
| Popis: | 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/ cm 2 . 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 TiO 2 HCG mirrors. |
| Databáze: | OpenAIRE |
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