Metal Nanoparticle Based All-Optical Photothermal Light Modulator
Metal Nanoparticle Based All-Optical Photothermal Light Modulator
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DOI：
10.1021/nn406389f
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发表时间：
2014-02-01
期刊：
影响因子：
17.1
通讯作者：
Cichos, Frank
中科院分区：
文献类型：
--
作者：
Heber, Andre;Selmke, Markus;Cichos, Frank
我们提出了一个简单的方案，通过耗散过程介导的光来操纵光强度。该实施方案利用光激发等离子体金属纳米颗粒释放的热量来控制向列液晶膜中各向同性气泡的尺寸。向列膜被设计为零级半波片，它将入射探测光偏振旋转 pi/2，并被结构后面的分析偏振器阻挡。不断增长的各向同性气泡扰乱半波片并导致探头传输通过调制器结构。我们的结果表明，耗散过程可以有利地用于逐光控制光。
We present a simple scheme for the manipulation of light intensity by light mediated by a dissipative process. The implementation employs the heat released by an optically excited plasmonic metal nanoparticle to control the size of an isotropic bubble in a nematic liquid crystal film. The nematic film is designed as a zero-order half-wave plate that rotates an incident probe light polarization by pi/2 and is blocked by an analyzing polarizer behind the structure. The growing isotropic bubble disturbs the half-wave plate and causes the probe to be transmitted through the modulator structure. Our results demonstrate that dissipative processes may be advantageously used to control light by light.