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21 August 2020 Performance analysis of vertical photodetector for efficient on chip optical interconnect
Anoopshi Johari, Abhinav Bhatnagar, Sanjeev Naithani, Brajesh Kumar Kaushik
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Proceedings Volume 11483, Novel Optical Systems, Methods, and Applications XXIII; 114830L (2020) https://doi.org/10.1117/12.2568582
Event: SPIE Optical Engineering + Applications, 2020, Online Only
Abstract
In this work, the optical absorption analysis of the Vertical Photodetector for Optical Interconnect is done. For efficient detection of the signal at the receiver, a photodetector is required for designing of efficient optical interconnects. The light transmitted from the optical source is coupled into the waveguide and received by the detector. Vertical photodetector can be designed using Si and Ge but due to large bandgap, Si can’t detect the optical signal efficiently at wavelengths used for optical communication (1.3 to 1.55 μm). This can be done by using smaller band gap material (Ge) to design a photo- detector. Ge photo- detector offer high performance optical interface solutions. The Optical absorption property of photodetector is analyzed using Lumerical FDTD. It is observed that the absorption rate of vertical Ge-Si photodetector vary in different plane and provides high responsivity at 1.55 μm because the region of absorption can be made longer to enable full absorption. We investigate the absorption rate of the designed vertical photodetector because the responsivity of the photodetector depends on the absorption rate. The designed structure can be used in on-chip optical interconnect with high absorption rate and low cost.
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Anoopshi Johari, Abhinav Bhatnagar, Sanjeev Naithani, and Brajesh Kumar Kaushik "Performance analysis of vertical photodetector for efficient on chip optical interconnect", Proc. SPIE 11483, Novel Optical Systems, Methods, and Applications XXIII, 114830L (21 August 2020); https://doi.org/10.1117/12.2568582
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KEYWORDS
Photodetectors
Absorption
Optical interconnects
Finite-difference time-domain method
Optical communications
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