"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Effect of size of air holes and width of flat on NR-PC flat lens for target detection and image

J. LU1,* , Y. SHEN2,3, Y. F. LIAN4

Affiliation

  1. Lab Management and Service Center, University of Shanghai for Science and Technology, Shanghai 200093, China
  2. Shanghai Medical instrumentrtion college, Shanghai 200093, China
  3. University of Shanghai for Science and Technology, Shanghai 200093, China
  4. School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang, 212013, China

Abstract

A finite-difference time-domain (FDTD) method is used to investigate the effect of the size of air holes and width of flat of cylinder air holes negative-refraction photonic crystal (NR-PC) lens on the performance of lightwave target detection and imaging in the paper. Numerical simulations indicate that significant enhancement of the scattering signal can be obtained due to the use of the NR-PC flat lens; consequently, great improvement of the refocusing gain as well as the imaging resolution will be provided. We further study the effect on target detection and imaging by using different size of air holes and width of flat of NR-PC flat lens. The results demonstrate that we can get better resolution by appropriately decreasing the radius of the defective cylinder (R=0.2a). What’s more, the narrower the width (from seven rows to eleven rows air holes) of flat is, the lower the refocusing resolution will be..

Keywords

NR-PC, Cylinder air holes, Dynamic scanning, Refocusing resolution.

Submitted at: May 23, 2013
Accepted at: Jan. 21, 2015

Citation

J. LU, Y. SHEN, Y. F. LIAN, Effect of size of air holes and width of flat on NR-PC flat lens for target detection and image, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 1-2, pp. 103-109 (2015)