Transmission, reflection, and absorption spectroscopy of graphene microribbons in the terahertz region
Transmission, reflection, and absorption spectroscopy of graphene microribbons in the terahertz region
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DOI：
10.7567/jjap.55.06gf08
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发表时间：
2016-06-01
影响因子：
1.5
通讯作者：
Yamamoto, Hideki
中科院分区：
文献类型：
--
作者：
Suzuki, Satoru;Takamura, Makoto;Yamamoto, Hideki
透射光谱和反射光谱都是从 SiC 基板上的石墨烯微带获得的，该微带通过等离子体激发与太赫兹光共振耦合。吸收光谱也由透射光谱和反射光谱得出。受限带内等离子体激元的吸收达到5-10%/层，这比与波长无关的带间吸收2.3%/层大得多。由于表面的干涉效应，发现从背面照射微带/基底样品时的吸收比从带表面照射时的吸收更大。 (C) 2016 日本应用物理学会
Both transmission and reflection spectra were obtained from graphene microribbons on a SiC substrate, which resonantly coupled with terahertz light through plasmon excitation. An absorption spectrum was also derived from the transmission and reflection spectra. Absorption by the confined intraband plasmons reached 5-10%/layer, which is considerably larger than the wavelength-independent interband absorption of 2.3%/layer. The absorption was found to be larger when the microribbons/substrate sample was illuminated from the back surface than from the ribbon surface because of an interference effect at the surface. (C) 2016 The Japan Society of Applied Physics