Abstract
Two-photon absorption coefficients of GaN for below band gap ultraviolet wavelength and midgap infrared wavelength were measured by using femtosecond pulsewidth autocorrelation and Z-scan techniques. Large two-photon absorption coefficients were obtained. Taking advantage of the large two-photon absorption, we have demonstrated two-photon confocal imaging of a GaN thin film. Direct correlation was found between the yellow luminescence and suppression of bandedge luminescence.
Original language | English |
---|---|
Pages (from-to) | 439-441 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 76 |
Issue number | 4 |
DOIs | |
State | Published - 24 Jan 2000 |