High rejection ratio silicon membrane Bragg filters (Conference Presentation)

2018 ◽  
Author(s):  
Carlos A. Alonso-Ramos ◽  
Xavier Le Roux ◽  
Daniel Benedikovic ◽  
Vladyslav Vakarin ◽  
Elena Durán-Valdeiglesias ◽  
...  
Keyword(s):  
Silicon Membrane ◽  
Rejection Ratio ◽  
High Rejection

New Bias-Controlled Three-Color Detectors using Stacked a-SiC:H/a-Si:H Heterostructures

1995 ◽  
Vol 377 ◽  
Author(s):  
Marko Topič ◽  
Franc Smole ◽  
Aleš Groznik ◽  
Jože Furlan
Keyword(s):  
Metal Structure ◽  
Simple System ◽  
Spectral Responsivity ◽  
Rejection Ratio ◽  
Photocurrent Generation ◽  
Current Voltage ◽  
Rate Relationship ◽  
Current Voltage Characteristics ◽  
Geometrical Dimensions ◽  
High Rejection

ABSTRACTA novel family of three-terminal three-color (blue, green, red) detectors based on stacked a-SiC:H/a-Si:H heterostructures is presented: TCO/PIN/TCO/PINIP/TCO/metal and TCO/PINIP/TCO/PIN/TCO/metal structure. The analysis of stacked photodetectors and the optimization of their geometrical dimensions is performed using the adopted ASPIN simulation program. Both structures are mutually compared with regard to calculated current-voltage characteristics and spectral responsivity. They both exhibit linear photocurrent/generation-rate relationship for all three colors at peak wavelengths 430, 530, 630 nm, applying ±1 V or more. This linearity allows that all three colors can be detected with high rejection ratio using simple system electronics.

A Theoretical and Experimental Comparison of 4H- and 6H-SiC MSM UV Photodetectors

2012 ◽  
Vol 717-720 ◽  
pp. 1207-1210
Author(s):  
Jang Kwon Lim ◽  
Ludwig Östlund ◽  
Qin Wang ◽  
Wlodek Kaplan ◽  
Sergey A. Reshanov ◽  
...  
Keyword(s):  
Dark Current ◽  
Experimental Comparison ◽  
Metal Electrodes ◽  
Current Ratio ◽  
Uv Photodetectors ◽  
Rejection Ratio ◽  
Uv Illumination ◽  
Metal Semiconductor Metal ◽  
Msm Photodetectors ◽  
High Rejection

This paper reports on fabrication and modeling of 4H- and 6H-SiC metal-semiconductor-metal (MSM) photodetectors (PDs). MSM PDs have been fabricated on 4H-SiC and 6H-SiC epitaxial layers, and their performance analyzed by MEDICI simulation and measurements. The simulations were also used to optimize the sensitivity by varying the width and spacing of the interdigitated electrodes. The fabricated PDs with 2 µm wide metal electrodes and 3 µm spacing between the electrodes exhibited, under UV illumination, a peak current to dark current ratio of 105 and 104 in 4H-SiC and 6H-SiC, respectively. The measured spectral responsivity of 6H-SiC PDs was higher compared to that of 4H-SiC PDs, with a cutoff at 407 nm compared to 384 nm in 4H-SiC PDs. Also the peak responsivity occurred at a shorter wavelength in 6H material. A high rejection ratio between the photocurrent and dark current was found in both cases. These experimental results were in agreement with simulation.

Highly Responsive ZnO/AlN/Si Heterostructure-Based Infrared- and Visible-Blind Ultraviolet Photodetectors With High Rejection Ratio

2019 ◽  
Vol 66 (3) ◽  
pp. 1345-1352 ◽  
Author(s):  
Basanta Roul ◽  
Rohit Pant ◽  
Arun Malla Chowdhury ◽  
Greeshma Chandan ◽  
Deependra Kumar Singh ◽  
...  
Keyword(s):  
Rejection Ratio ◽  
Ultraviolet Photodetectors ◽  
Visible Blind ◽  
High Rejection

PVDF Hollow fiber Membrane with High Flux and High Rejection Ratio Prepared by Irradiation Induced Grafting of PAA

2010 ◽  
Vol 297 (1) ◽  
pp. 231-239 ◽  
Author(s):  
Wei Junfu ◽  
Zhao Kongyin ◽  
Wang Lei ◽  
Zhang Huan ◽  
Chen Li ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
High Flux ◽  
Fiber Membrane ◽  
Rejection Ratio ◽  
High Rejection
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