Light Absorption and Reflection in Nanostructured GaAs Metal–Semiconductor–Metal Photodetectors

2014 ◽  
Vol 13 (5) ◽  
pp. 982-989 ◽  
Author(s):  
Narottam Das ◽  
Farzaneh Fadakar Masouleh ◽  
Hamid Reza Mashayekhi
Keyword(s):  
Light Absorption ◽  
Metal Semiconductor Metal

Efficient light absorption in metal–semiconductor–metal nanostructures

2004 ◽  
Vol 85 (2) ◽  
pp. 194-196 ◽  
Author(s):  
Stéphane Collin ◽  
Fabrice Pardo ◽  
Roland Teissier ◽  
Jean-Luc Pelouard
Keyword(s):  
Light Absorption ◽  
Metal Nanostructures ◽  
Metal Semiconductor Metal

scholarly journals Impact of Nanograting Phase-Shift on Light Absorption Enhancement in Plasmonics-Based Metal-Semiconductor-Metal Photodetectors

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Narottam Das ◽  
Ayman Karar ◽  
Chee Leong Tan ◽  
Kamal Alameh ◽  
Yong Tak Lee
Keyword(s):  
Phase Shift ◽  
Light Absorption ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Fdtd Method ◽  
Absorption Enhancement ◽  
Force Microscopy ◽  
Atomic Force ◽  
Metal Semiconductor Metal ◽  
Difference Time

The finite difference time-domain (FDTD) method is used to simulate the light absorption enhancement in a plasmonic metal-semiconductor-metal photodetector (MSM-PD) structure employing a metal nanograting with phase shifts. The metal fingers of the MSM-PDs are etched at appropriate depths to maximize light absorption through plasmonic effects into a subwavelength aperture. We also analyse the nano-grating phase shift and groove profiles obtained typically in our experiments using focused ion beam milling and atomic force microscopy and discuss the dependency of light absorption enhancement on the nano-gratings phase shift and groove profiles inscribed into MSM-PDs. Our simulation results show that the nano-grating phase shift blue-shifts the wavelength at which the light absorption enhancement is maximum, and that the combined effects of the nano-grating groove shape and phase shift degrade the light absorption enhancement by up to 50%.

scholarly journals Metal-semiconductor-metal (MSM) photodetectors with plasmonic nanogratings*

2011 ◽  
Vol 83 (11) ◽  
pp. 2107-2113 ◽  
Author(s):  
Narottam Das ◽  
Ayman Karar ◽  
Chee Leong Tan ◽  
Mikhail Vasiliev ◽  
Kamal Alameh ◽  
...  
Keyword(s):  
Light Absorption ◽  
Enhancement Factor ◽  
Signal Propagation ◽  
Optical Signal ◽  
Fdtd Simulation ◽  
Absorption Enhancement ◽  
Metal Semiconductor Metal ◽  
Simulation Results ◽  
Msm Photodetectors ◽  
Difference Time

We discuss the light absorption enhancement factor dependence on the design of nanogratings inscribed into metal-semiconductor-metal photodetector (MSM-PD) structures. These devices are optimized geometrically, leading to light absorption improvement through plasmon-assisted effects. Finite-difference time-domain (FDTD) simulation results show ~50 times light absorption enhancement for 850 nm light due to improved optical signal propagation through the nanogratings. Also, we show that the light absorption enhancement is strongly dependent on the nanograting shapes in MSM-PDs.

scholarly journals Modulation of light absorption in flexible GeSn metal–semiconductor–metal photodetectors by mechanical bending

2020 ◽  
Vol 8 (39) ◽  
pp. 13557-13562
Author(s):  
Shu An ◽  
Shaoteng Wu ◽  
Chuan Seng Tan ◽  
Guo-En Chang ◽  
Xiao Gong ◽  
...  
Keyword(s):  
Light Absorption ◽  
Mechanical Strain ◽  
Optoelectronic Properties ◽  
Metal Semiconductor Metal ◽  
Mechanical Bending ◽  
Msm Photodetectors

We have demonstrated flexible GeSn metal–semiconductor–metal (MSM) photodetectors (PDs) by exploring the effect of mechanical strain on their optoelectronic properties.

scholarly journals A Comprehensive Analysis of Plasmonics-Based GaAs MSM-Photodetector for High Bandwidth-Product Responsivity

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Narottam Das ◽  
Farzaneh Fadakar Masouleh ◽  
Hamid Reza Mashayekhi
Keyword(s):  
Light Absorption ◽  
Numerical Study ◽  
Near Field ◽  
Structure Design ◽  
Physical Parameters ◽  
Light Enhancement ◽  
Metal Semiconductor Metal ◽  
High Bandwidth ◽  
Msm Photodetector ◽  
Difference Time

A detailed numerical study of subwavelength nanogratings behavior to enhance the light absorption characteristics in plasmonic-based metal-semiconductor-metal photodetectors (MSM-PDs) is performed by implementation of 2D finite-difference time-domain (FDTD) algorithm. Due to the structure design and changes in the device physical parameters, various devices with different geometries are simulated and compared. Parameters like nano-grating height and duty cycle (DC) are optimized for rectangular and taper subwavelength metal nanogratings on GaAs substrate and their impact on light absorption below the diffraction limits are confirmed. The calculated light enhancement is ~32.7-times for an optimized device in comparison with a conventional MSM-PD. This enhancement is attributed to the plasmonic effects in the near-field region.

CHARACTERIZATION OF AN AlGaAs/GaAs METAL-SEMICONDUCTOR-METAL PHOTODETECTOR

1988 ◽  
Vol 49 (C4) ◽  
pp. C4-325-C4-328
Author(s):  
M. ZIRNGIBL ◽  
R. SACHOT ◽  
M. ILEGEMS
Keyword(s):  
Metal Semiconductor Metal
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