Digital phase conjugation of second harmonic radiation emitted by nanoparticles in turbid media
Digital phase conjugation of second harmonic radiation emitted by nanoparticles in turbid media
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DOI：
10.1364/oe.18.012283
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发表时间：
2010-06-07
期刊：
影响因子：
3.8
通讯作者：
Psaltis, Demetri
中科院分区：
文献类型：
--
作者：
Hsieh, Chia-Lung;Pu, Ye;Psaltis, Demetri
我们演示了聚焦相干光通过混浊介质的纳米粒子上的二次谐波产生（SHG）场的数字光学相位共轭的基础上。在混浊介质中的一个SHG活性纳米颗粒在基频激发，并发出SHG场作为点源。二次谐波辐射被混浊介质散射，用离轴数字全息术记录散射场。然后通过使用纯相位空间光调制器产生相位共轭光束，并通过混浊介质发送回来，这在纳米颗粒上形成了近乎理想的焦点。(C)2010年美国光学学会
We demonstrate focusing coherent light on a nanoparticle through turbid media based on digital optical phase conjugation of second harmonic generation (SHG) field from the nanoparticle. A SHG active nanoparticle inside a turbid medium was excited at the fundamental frequency and emitted SHG field as a point source. The SHG emission was scattered by the turbid medium, and the scattered field was recorded by off-axis digital holography. A phase-conjugated beam was then generated by using a phase-only spatial light modulator and sent back through the turbid medium, which formed a nearly ideal focus on the nanoparticle. (C) 2010 Optical Society of America