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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 5, Iss. S1 — May. 31, 2007
  • pp: S204–S206

Upconversion luminescence of single-crystalline ZnO by femtosecond laser irradiation

Xinshun Wang, Juan Song, Haiyi Sun, Zhizhan Xu, and Jianrong Qiu  »View Author Affiliations


Chinese Optics Letters, Vol. 5, Issue S1, pp. S204-S206 (2007)


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Abstract

Near infrared to ultraviolet (UV) and visible upconversion luminescence was observed in ZnO single crystalline under femtosecond laser irradiation. The optical properties of the crystal reveal that the UV and visible emission band are due to the exciton transition (D0X) bound to neutral donors and the deep luminescent centers in ZnO, respectively. The relationship between the upconversion luminescence intensity and the pump power of the femtosecond laser reveals that the UV emission belongs to three-photon simultaneous band-to-band excitation and the visible emission belongs to two-photon simultaneous defect-absorption-induced luminescence. The saturation effects are also found in the upconversion process of ZnO.

© 2007 Chinese Optics Letters

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(190.2620) Nonlinear optics : Harmonic generation and mixing
(300.2530) Spectroscopy : Fluorescence, laser-induced
(320.2250) Ultrafast optics : Femtosecond phenomena

Citation
Xinshun Wang, Juan Song, Haiyi Sun, Zhizhan Xu, and Jianrong Qiu, "Upconversion luminescence of single-crystalline ZnO by femtosecond laser irradiation," Chin. Opt. Lett. 5, S204-S206 (2007)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-5-S1-S204

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