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research article

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

Hsieh, C.-L.  
•
Pu, Y.  
•
Grange, R.  
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2010
Optics Express

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 offaxis 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. © 2010 Optical Society of America.

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OE_18_12283_May2010.pdf

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