石墨烯纳米粒子
Proposed Graphene Nanospaser
摘要：
我们发现，石墨烯单层与多量子阱系统耦合可以形成石墨烯spaser，它是石墨烯中表面等离子体激元的相干量子发生器。石墨烯spaser的有源元件是多量子阱系统，其设计类似于量子级联激光器的有源元件的设计。在多量子阱系统的实际参数下，石墨烯单层中的spasing可以在石墨烯的有限掺杂和等离子体激元频率0.15 eV下实现，该频率接近多量子阱系统中的子带间跃迁的典型频率。
英文摘要：
We show that graphene monolayer coupled to multi-quantum well system can form a graphene spaser, which is a coherent quantum generator of surface plasmons in graphene. The active element of graphene spaser is a multi-quantum well system with a design similar to the design of an active element of quantum cascade laser. Under realistic parameters of the multi-quantum well system, the spasing in graphene monolayer can be achieved at a finite doping of graphene and at a plasmon frequency, 0.15 eV, close to the typical frequency of intersubband transitions in multi-quantum well systems.
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