Abstract Imaging properties of a two-dimensional photonic crystal slab lens are investigated through the finite-difference time-domain method. In this paper, we consider the photonic crystal slab consisting of a square lattice of square metallic rods immersed in a dielectric background. Through the analysis of the equifrequency-surface contours and the field patterns of a point source placed in the vicinity of the photonic crystal slab, we find that a good-quality image can form at the frequencies in the second TM-polarized photonic band. Comparing the images formed at different frequencies, we can clearly see that an excellent-quality image is formed by the mechanisms of simultaneous action of the self-collimation effect and the negative-refraction effect.
Received: 10 October 2005
Revised: 27 December 2005
Accepted manuscript online:
Fund: Project supported by the National Key Basic Research Special Foundation of China (Grant Nos 2004CB719804 and 2001CB610402), the National Natural Science Foundation of China (Grant No 10404036) and National Center for Nanoscience and Technology,China (Grant No 2003CB7169) also the support from the supercomputing Center, CNIC, CAS.
Cite this article:
Feng Shuai (冯帅), Feng Zhi-Fang (冯志芳), Ren Kun (任坤), Ren Cheng (任承), Li Zhi-Yuan (李志远), Cheng Bing-Ying (程丙英), Zhang Dao-Zhong (张道中) Near-field imaging of a square-lattice metallic photonic-crystal slab at the second band 2006 Chinese Physics 15 552
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
