Graphene Active Plasmonics for New Types of Terahertz Lasers
Graphene Active Plasmonics for New Types of Terahertz Lasers
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DOI：
10.1142/s0129156414500165
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发表时间：
2014-11
影响因子：
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通讯作者：
T. Otsuji;A. Satou;S. B. Tombet;A. Dubinov;V. Popov;V. Ryzhii;M. Shur
中科院分区：
文献类型：
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作者：
T. Otsuji;A. Satou;S. B. Tombet;A. Dubinov;V. Popov;V. Ryzhii;M. Shur
本文综述了利用石墨烯中的活性等离子体激元实现新型太赫兹（THz）激光器的最新进展。源于石墨烯超快非平衡载流子动力学和宽带THz频率范围内的声子性质的光学增益可能为THz激光器铺平道路，但挑战是克服THz范围内的强损耗。石墨烯等离子体激元是由石墨烯中的二维载流子激发的集体电荷密度波的量子，可以显著增强光-物质（太赫兹光子-石墨烯）相互作用，导致“巨大的太赫兹增益”。一种可能的实施方式依赖于石墨烯-金属微带阵列结构中的超辐射等离子体太赫兹激光。
This paper reviews recent advances toward new types of terahertz (THz) lasers using active plasmonics in graphene. Optical gain originated from graphene ultrafast nonequilibrium carrier dynamics and phonon properties in the broadband THz frequency range might pave the way for the THz lasers but the challenge is to overcome the strong losses in the THz range. Graphene plasmons, quanta of the collective charge density waves excited by the two-dimensional carriers in graphene, can substantially enhance the light-matter (THz photons-graphene) interaction, leading to a “giant THz gain”. One possible implementation relies on superradiant plasmonic THz lasing in graphene-metal micro-ribbon array structures.