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Focusing Properties in Photonic Crystal Structure Formed by Air Holes in Dielectric Background with Concave Interface |
| JIAN Zhi-Jian1;PENG Jing-Cui1;ZHOU Ren-Long2 |
| ¹Department of Applied Physics, Hunan University, Changsha 410082
²National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083
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| Cite this article: |
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JIAN Zhi-Jian, PENG Jing-Cui, ZHOU Ren-Long 2006 Chin. Phys. Lett. 23 3359-3362 |
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Abstract We investigate the focusing properties of photonic crystal structures with a concavo-concave as the photonic crystal boundary. The photonic crystal is constituted by air holes parallelly distributed in a uniform dielectric. A good-quality focus of a plane wave can appear out of the photonic crystal structure, and a strong far field focus is also formed from the photonic crystal interface. A negative-refractive beam at the frequency 0.195 (2πc/a) for the excited Bloch wave mode near the Brillouin zone edges under all incident angles are obtained by simulation.
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| Keywords:
78.20.Ci
41.20.Jb
42.70.Qs
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Published: 01 December 2006
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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42.70.Qs
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(Photonic bandgap materials)
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