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On-chip silicon nano-slab photodetector integrated wavelength division de-multiplexer in the 850 nm band

Chatterjee, A and Selvaraja, SK (2022) On-chip silicon nano-slab photodetector integrated wavelength division de-multiplexer in the 850 nm band. In: Applied Optics, 61 (6). pp. 1403-1412.

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Official URL: https://doi.org/10.1364/AO.450621


We present an on-chip photodetector integrated wavelength filter on a SiN-on-silicon-on-insulator (SOI) platform in the 850 nm wavelength window. The wavelength filter is designed using an echelle grating with a distributed Bragg reflector as the grating reflectors. We present the design and experimental realization of a six-channel wavelength filter with a channel spacing of 10 nm. Experimentally, we achieve an insertion loss of 4.3 dB and an adjacent channel cross talk of 22 dB. We demonstrate a silicon nano-slab waveguide integrated metal-semiconductor-metal photodetector with a maximum responsivity of 0.56 A/W and dark current of 217 nA. Furthermore, we demonstrate the integration of the echelle grating with the detector and show the feasibility of a CMOS compatible SiN-on-SOI platform for various applications, including short-reach communication and sensing applications. © 2022 Optica Publishing Group

Item Type: Journal Article
Publication: Applied Optics
Publisher: The Optical Society
Additional Information: The copyright for this article belongs to the The Optical Society.
Keywords: Photodetectors; Photons; Reflection; Silicon nitride; Silicon on insulator technology, Channel wavelength; Design realization; Distributed-bragg-reflectors; Echelle gratings; Experimental realizations; Grating reflectors; On chips; Silicon-on-insulator platforms; Wavelength division de-multiplexers; Wavelength filters, Diffraction gratings
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 21 Jun 2022 06:34
Last Modified: 21 Jun 2022 06:34
URI: https://eprints.iisc.ac.in/id/eprint/73852

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