Ultra-contrast ratio optical encoder using photonic crystal waveguide

•The optimized L-shaped and Y-shaped all-optical encoder is proposed for photonic integrated circuits.•The nano-device has ultra-fast data rate (3.52 Tbps) and high contrast ratio (25.82 dB).•The response time and footprint of the presented device are 0.2833 picoseconds and 343 µm2, respectively. In...

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Bibliographic Details
Published in:Materials letters 2019-09, Vol.251, p.144-147
Main Authors: Rajasekar, R., Latha, R., Robinson, S.
Format: Article
Language:English
Subjects:
Coders
Crystal defects
Defects
Dislocations
Encoder
Finite difference time domain method
Integrated circuits
Logic
Materials science
Microprocessors
Microstructure
Optical communication
Optical encoders
Photonic crystal
Photonic crystals
Response time
Signal processing
Time domain analysis
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Summary:•The optimized L-shaped and Y-shaped all-optical encoder is proposed for photonic integrated circuits.•The nano-device has ultra-fast data rate (3.52 Tbps) and high contrast ratio (25.82 dB).•The response time and footprint of the presented device are 0.2833 picoseconds and 343 µm2, respectively. In recent year, ultra-compact and high-speed optical logic devices are extremely attractive for the scientific community and optical computing. In this paper, 2 × 1 encoder is proposed and designed using two-dimensional photonic crystal based microstructure. This logic device is constructed by point and line defects in a triangular lattice with silicon rod embedded in air host. The encoder performances are analyzed by using Finite Difference Time Domain method. The numerical results reveal that the designed micro device is capable of working accurately for different logic states. The proposed device is operated at 1520 nm, and it provides a high contrast ratio of 25.82 dB, the excellent response time of 0.2833 ps and a bit rate of around 3.52 Tbps. Hence, it is highly suitable for an optical signal processor and photonic integrated circuits.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.05.040