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 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.


Published in:
Optics Express, 18, 12, 12283-12290
Year:
2010
ISSN:
10944087
Keywords:
Other identifiers:
Scopus: 2-s2.0-77953578251
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 Record created 2010-11-23, last modified 2018-03-17

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