Two-photon absorption study of GaN | Zendy

ChiKuang Sun | Zendy; Jian-Chin Liang | Zendy; Jiun-Cheng Wang | Zendy; FuJen Kao | Zendy; S. Keller | Zendy; Michael Mack | Zendy; Umesh K. Mishra | Zendy; Steven P. DenBaars | Zendy

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Two-photon absorption study of GaN

Author(s) -

ChiKuang Sun,

Jian-Chin Liang,

Jiun-Cheng Wang,

FuJen Kao,

S. Keller,

Michael Mack,

Umesh K. Mishra,

Steven P. DenBaars

Publication year - 2000

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.125780

Subject(s) - femtosecond , materials science , absorption (acoustics) , luminescence , two photon absorption , optoelectronics , wavelength , photon , photoluminescence , optics , infrared , laser , physics , composite material

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.

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