We report on light-induced optical tuning of colloidal photonic crystals doped with goldnanoparticles (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 andassociated to a nanoparticle reshaping. Fine tuning was achieved by controlling either the pulse energy or the irradiation time.
|Numero di pagine||3|
|Rivista||Applied Physics Letters|
|Stato di pubblicazione||Published - 2008|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
Stivala, S., Pasquazi, A., Cucini, Stivala, S., Meneghetti, Assanto, G., Comoretto, & Amendola, V. (2008). In situ tuning of a photonic band gap with laser pulses. Applied Physics Letters, 93, 091111-.