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Photonic Sensors

, Volume 7, Issue 3, pp 278–282 | Cite as

Optimization of top coupling grating for very long wavelength QWIP based on surface plasmon

  • Guodong Wang
  • Junling Shen
  • Xiaolian Liu
  • Lu Ni
  • Saili Wang
Open Access
Regular

Abstract

The relative coupling efficiency of two-dimensional (2D) grating based on surface plasmon for very long wavelength quantum well infrared detector is analyzed by using the three-dimensional finite-difference time domain (3D-FDTD) method algorithm. The relative coupling efficiency with respect to the grating parameters, such as grating pitch, duty ratio, and grating thickness, is analyzed. The calculated results show that the relative coupling efficiency would reach the largest value for the 14.5 μm incident infrared light when taking the grating pitch as 4.4 μm, the duty ratio as 0.325, and the grating thickness as 0.07 μm, respectively.

Keywords

Very long wavelength QWIP surface plasmon 2D grating 

Notes

Acknowledgement

This work was supported by the National Natural Science Foundation of China under Grant No. U1304608, the Outstanding Youth Funding of Henan Polytechnic University under Grant No. J2013-05, and Program for Innovative Research Team of Henan Polytechnic University under Grant No. T2015-3.

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Copyright information

© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/ licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Guodong Wang
    • 1
  • Junling Shen
    • 2
  • Xiaolian Liu
    • 1
  • Lu Ni
    • 2
  • Saili Wang
    • 2
  1. 1.School of Physics and Electronic Information EngineeringHenan Polytechnic UniversityJiaozuoChina
  2. 2.School of Electrical Engineering and AutomationHenan Polytechnic UniversityJiaozuoChina

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