We report the characterization of the second-harmonic response of several types of second-order nonlinear probes, which consist of an optical fiber taper, a single nanowire attached to the taper, and functional second-harmonic micro- or nanocrystals attached to the nanowire. We observed anomalous power dependence in the probe composed of multiwall carbon nanotube (CNT) and BaTiO3 nanocrystals. We attributed this anomaly to the transition of BaTiO3 nanocrystals from the tetragonal to the cubic phase due to the heating of CNT by the ultrashort laser pulses.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of the Optical Society of America B: Optical Physics|
|State||Published - Nov 2011|
All Science Journal Classification (ASJC) codes
- Statistical and Nonlinear Physics
- Atomic and Molecular Physics, and Optics