6533b823fe1ef96bd127f5a9

RESEARCH PRODUCT

In situ tuning of a photonic band gap with laser pulses

Vincenzo AmendolaSalvatore StivalaAlessia PasquaziGaetano AssantoM. CuciniMoreno MeneghettiDavide Comoretto

subject

Materials sciencePhysics and Astronomy (miscellaneous)business.industrySurface plasmonPhysics::OpticsColloidal crystaloptical tuningLaserlaw.inventionOpticslawPicosecondOptoelectronicsPhotonic crystalSurface plasmon resonancebusinessAbsorption (electromagnetic radiation)Photonic crystalLocalized surface plasmon

description

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 micron in a standard pump-probe setup, we observed permanent changes in the stop band resonance around 1.7 micron, 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.

yearjournalcountryeditionlanguage
2008-09-01
http://hdl.handle.net/10447/49275