GaN vertical-cavity surface-emitting laser with a high-contrast grating reflector

Autor:	Shuo Yi Kuo, Ehsan Hashemi, Tien-Chang Lu, Tsu Chi Chang, Åsa Haglund
Rok vydání:	2018
Předmět:	Materials science business.industry media_common.quotation_subject Reflector (antenna) Grating medicine.disease_cause Reflectivity Vertical-cavity surface-emitting laser Lasing wavelength medicine Optoelectronics Contrast (vision) business Lasing threshold Ultraviolet media_common
Zdroj:	High Contrast Metastructures VII.
DOI:	10.1117/12.2289318
Popis:	We report a GaN-based VCSEL with a high-contrast grating (HCG) as the top mirror. The HCG consisted of TiO2 and rested directly on the n-GaN without an airgap or the use of any DBR layers to boost the reflectivity. The full VCSEL structure was optically pumped at room temperature and showed a lasing threshold of approximately 0.69MW/cm2 and a lasing wavelength at 369.1 nm. This first demonstration of lasing in a HCG GaN-based VCSEL opens up the possibility to explore all the potential benefits of HCGs in the blue and ultraviolet spectral regime.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b325acb0a7dbfe884d69bd6cec930877 https://doi.org/10.1117/12.2289318 Zobrazit plný text záznamu