Polarization-independent omnidirectional band gaps in heterostructures containing negative-index materials |
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| Authors: | X H Deng T B Wang J T Liu J H Huang T B Yu Q H Liao and N H Liu |
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| Institution: | (1) College of Science, Shandong University of Science and Technology, Qingdao, Shandong, 266510, China;(2) College of information technology, HLJ August First Land Reclamation University, Daqing, Heilongjiang, 163319, China |
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| Abstract: | We proposed a type of heterostructure by combining two
photonic crystals (PCs) consisting of alternating negative-index materials
and positive-index materials layers. It is demonstrated by transfer matrix
method that the proposed structure has a polarization-independent
omnidirectional band gap (OBG), which is independent of the incident angle
for both TE and TM polarizations. Compared to a single PC, the frequency
range of the OBG in a heterostructure can be notably enlarged. Such a
structure has potential applications in improving planar microcavities,
optical fibers, and Fabry-Pérot resonators, etc. |
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