Optical switching of a graphene mechanical switch using the Casimir effect
Optical switching of a graphene mechanical switch using the Casimir effect
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DOI：
10.1063/1.4993672
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发表时间：
2017-09
影响因子：
3.2
通讯作者：
N. Inui
中科院分区：
文献类型：
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作者：
N. Inui
我们提出了一种用光控制石墨烯机械开关的方法。通过放置平行于掺杂硅膜的自支撑石墨烯薄片，用光照射该膜可以使石墨烯与该膜接触。这种操作是基于光电离导致的石墨烯薄片和掺杂硅膜之间的Casimir力的增强；因此，即使在不施加任何电压的情况下，也可以发生拉入现象。我们从理论上研究了石墨烯薄片的最大位移与照射光功率的关系。此外，通过分析掺杂硅膜中载流子浓度的时间演化，估算了开关时间。
We propose a method to control a graphene-based mechanical switch with light. By positioning a self-supporting graphene sheet parallel to a doped silicon membrane, irradiation of the membrane with light can bring the graphene into contact with the membrane. This operation is based on the enhancement of the Casimir force between the graphene sheet and a doped silicon membrane that results from photoionization; therefore, pull-in phenomena can occur even without applying any voltage. We theoretically investigated the dependence of the maximum displacement of a graphene sheet on the power of the irradiation light. Furthermore, the switching time is estimated by analyzing the time-evolution of the carrier density in a doped silicon membrane.