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Proceedings Paper

High contrast grating VCSELs for sensing applications
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Paper Abstract

High Contrast Gratings (HCGs) become an attractive alternative for Distributed Bragg Reflectors (DBRs) used as high reflecting mirrors for VCSELs. In this paper we propose to implement HCG or monolithic HCG as a top mirror of the 1650nm InP-based VCSEL intended for use as a methane sensing device. Its unique feature is related to the fact that light taking part in the resonance can be accessed without opening the laser cavity due to the slow light phenomenon which occurs in HCG. Particular designs of HCGs allow to concentrate significant part of the mode between the HCG stripes. In such constructions the presence of the substance in the vicinity of the HCG which interacts with light resonating in the laser will change its emission properties. This enables sensing absorption or change to the refractive index in proximity of the laser based on the emission parameters of the laser. We present a numerical analysis of 1650nm MHCG and HCG mirrors based on fully vectorial optical model. We found optimal parameters of HCGs and MHCGs to detect absorption and refractive index variations in the vicinity of the gratings, based on changes in power reflectance of analysed mirrors. Additionally we consider HCG and MHCG constructions which allow for broad wavelength tuning by the change of the refractive index of substance surrounding mirror.

Paper Details

Date Published: 27 January 2017
PDF: 9 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 101113B (27 January 2017); doi: 10.1117/12.2253189
Show Author Affiliations
Magdalena Marciniak, Łódz Univ. of Technology (Poland)
Marcin Gębski, Łódz Univ. of Technology (Poland)
Technische Univ. Berlin (Germany)
Maciej Dems, Łódz Univ. of Technology (Poland)
Krassimir Panajotov, Vrije Univ. Brussel (Belgium)
Institute of Solid State Physics (Bulgaria)
Tomasz Czyszanowski, Łódz Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

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