We report on light-induced optical tuning of colloidal photonic crystals doped with gold nanoparticles Au-nps. By resonantly exciting the Au-np surface plasmon absorption with picosecond pulses at 0.53 m in a standard pump-probe setup, we observed permanent changes in the stop band resonance around 1.7 m, with blue wavelength shifts as large as 30 nm and associated to a nanoparticle reshaping. Fine tuning was achieved by controlling either the pulse energy or the irradiation time.
IN-SITU ALL-OPTICAL TUNING OF A PHOTONIC BAND-GAP WITH LASER PULSES
COMORETTO, DAVIDE
2008-01-01
Abstract
We report on light-induced optical tuning of colloidal photonic crystals doped with gold nanoparticles Au-nps. By resonantly exciting the Au-np surface plasmon absorption with picosecond pulses at 0.53 m in a standard pump-probe setup, we observed permanent changes in the stop band resonance around 1.7 m, with blue wavelength shifts as large as 30 nm and associated to a nanoparticle reshaping. Fine tuning was achieved by controlling either the pulse energy or the irradiation time.
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