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Proceedings Paper

VCSEL with finite-size high-contrast metastructure
Author(s): Anjin Liu; Wanhua Zheng; Dieter Bimberg
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Paper Abstract

High-contrast metastructures like one-dimensional high-contrast gratings (HCGs) are promising to improve the performance of conventional VCSELs, also presenting a basis for new applications. Different from the previous studies where HCGs are always modelled being of infinite size, we studied here the finite-size HCGs, which match the real situation. We observe finite-size HCGs behaving very differently from infinite-size HCGs. The reflectivity of a finitesize HCG strongly depends on the HCG size and the source size. At the same time, the simulation results show, that finite-size HCGs can shape the output beam, and a Gaussian-like reflected wave is typically achieved. Most important the normally incident light is partly redirected to the in-plane direction, showing unidirectional transmission. Monolithically integrated HCG-based optical sensors can be based on this novel effect. An integrable HCG reflector was fabricated with GaInP as the sacrificial layer targeting the application of HCG-VCSEL at 980 nm range. The measured reflectivity agrees well with the calculated reflectivity.

Paper Details

Date Published: 6 November 2018
PDF: 8 pages
Proc. SPIE 10812, Semiconductor Lasers and Applications VIII, 1081202 (6 November 2018); doi: 10.1117/12.2501231
Show Author Affiliations
Anjin Liu, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)
Wanhua Zheng, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)
Dieter Bimberg, Technische Univ. Berlin (Germany)
Bimberg Chinese-German Ctr. for Green Photonics (China)

Published in SPIE Proceedings Vol. 10812:
Semiconductor Lasers and Applications VIII
Ning Hua Zhu; Werner H. Hofmann, Editor(s)

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