Abstract
Nonlinear optical properties of the undoped hybrid vapor phase epitaxy-grown (GaN film sample) were investigated and analyzed using a tunable femtosecond laser as an excitation source. As the laser wavelength was tuned from 762-796 nm, the sample emitted signals corresponding to the second-harmonic wavelength from 381-398 nm with a quadratic power dependence. A strong three-photon-process-related signal at 367 nm with cubic power dependence was simultaneously observed for the first time.
Original language | English |
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Pages (from-to) | 6805-6806 |
Number of pages | 2 |
Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
Volume | 40 |
Issue number | 12 |
DOIs | |
State | Published - Dec 2001 |
Keywords
- Confocal microscopy
- Gallium nitride
- Nonlinear optics
- Second harmonic generation (SHG)
- Three-photon excitation