期刊
OPTICS LETTERS
卷 37, 期 5, 页码 960-962出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.37.000960
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资金
- National Natural Science Foundation of China [10974206]
- Chinese Academy of Sciences
- Ministry of Science and Technology of China [2011YQ130018]
We propose a semiconductor-graphene cylinder that can serve as a terahertz (THz) photonic crystal. In such a structure, graphene plays a role in achieving a strong mismatch of the dielectric constant at the semiconductor-graphene interface due to its two-dimensional nature and relatively low value of the dielectric constant. We find that when the radius of the outer semiconductor layer is about rho(1) similar to 100 mu m, the frequencies of the photonic modes are within the THz bandwidth and they can be efficiently tuned via varying rho(1). Furthermore, the dispersion relation of the photonic modes shows that a semiconductor-graphene cylinder is of excellent light transport properties, which can be utilized for the THz waveguide. This study is pertinent to the application of graphene as THz photonic devices. (C) 2012 Optical Society of America
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