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

Author:

Chatterjee Avijit1,Selvaraja Shankar Kumar1ORCID

Affiliation:

1. Indian Institute of Science Bangalore

Abstract

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.

Funder

Department of Science and Technology, Ministry of Science and Technology, India

Ministry of Electronics and Information technology

Ministry of Education, India

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering

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