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Two-photon absorption and multiphoton-induced photoluminescence of bulk GaN excited below the middle of the band gap
| Title: | Two-photon absorption and multiphoton-induced photoluminescence of bulk GaN excited below the middle of the band gap |
| Authors: | Toda, Y. Browse this author →KAKEN DB | | Matsubara, T. Browse this author | | Morita, R. Browse this author →KAKEN DB | | Yamashita, M. Browse this author | | Hoshino, K. Browse this author | | Someya, T. Browse this author | | Arakawa, Y. Browse this author |
| Issue Date: | 2003 |
| Journal Title: | Applied Physics Letters |
| Volume: | 82 |
| Issue: | 26 |
| Start Page: | 4714 |
| Publisher DOI: | 10.1063/1.1587260 |
| Abstract: | Optical nonlinearity in the yellow luminescence (YL) band of GaN was investigated using thick bulk samples. Transient pump–probe measurements revealed strong transmission changes due to two-photon absorption(TPA) even at the middle of the YL band. The TPA coefficient evaluated reaches ∼5 cm/GW∼5 cm/GW at about 1.3 eV, which was as large as the mid-gap resonance. The TPA spectrum clearly showed that the observed large nonlinearity originated from the YL band. On the basis of efficient TPA in the YL band, relaxation processes in the multiphoton-induced photoluminescence excitation spectrum were also investigated. |
| Rights: | Copyright 2003 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 82, 4714 (2003) and may be found at http://dx.doi.org/10.1063/1.1587260. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/60592 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 森田 隆二
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