Numerical research on properties of optical-wave target detection and imaging from NR-PC flat lens

作者：Shen, T. G.; Meng, W. J.; Sun, J.^*; Li, Z. H.; Yuan, B. G.; Wang, G.; Huang, M.

来源：Applied Physics B: Lasers and Optics , 2010, 100(4): 841-846.

DOI：10.1007/s00340-010-4176-6

• NEGATIVE REFRACTIVE-INDEX
• PHOTONIC CRYSTALS

The characteristics of optical-wave target detection and imaging from a negative-refraction photonic crystal (NR-PC) flat lens are studied with a two-dimensional (2D) finite-difference time-domain (FDTD) method in the paper. The results show that there exists a transmission peak, with a value far greater than unit, resulting from the influence of the mini-forbidden bands and resonance excitation effect at resonance frequency. Also, the refocusing of backscattered optical wave from the target leads to its image with a sub-wavelength lateral resolution and great amplitude as long as the target is placed at the focus of the NR-PC flat lens. Therefore, the NR-PC flat lens will find many implications in optical area, especially in the detection and imaging of small targets.

• 出版日期2010-9
• 单位中国人民解放军镇江船艇学院; 江苏大学