Digital phase conjugation of second harmonic radiation emitted by nanoparticles in turbid media

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...

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Bibliographic Details
Published in:Optics express 2010-06, Vol.18 (12), p.12283-12290
Main Authors: Hsieh, Chia-Lung, Pu, Ye, Grange, Rachel, Psaltis, Demetri
Format: Article
Language:English
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.18.012283