Observation of huge nonlinear absorption enhancement near exciton resonance in GaN

被引：17

作者：

Lin, KH

Chern, GW

Huang, YC

Keller, S

DenBaars, SP

Sun, CK ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Elect Engn, Taipei 10617, Taiwan

[2] Natl Taiwan Univ, Grad Inst Electroopt Engn, Taipei 10617, Taiwan

[3] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA

来源：

APPLIED PHYSICS LETTERS | 2003年 / 83卷 / 15期

关键词：

D O I：

10.1063/1.1619218

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Huge excitonic enhancement of two-photon absorption near the exciton-transition energy was observed in the GaN system. The peak value of the nonlinear absorption coefficient is at least 1500 cm/GW, corresponding to an enhancement factor of >100. The room temperature exciton dephasing time is also obtained based on a spectral analysis to be similar to150 fs in bulk GaN, which is close to the exciton ionization time. (C) 2003 American Institute of Physics.

引用

收藏

页码：3087 / 3089

页数：3

相关论文

共 23 条

[1] Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN [J].

Fischer, AJ ;

Shan, W ;

Park, GH ;

Song, JJ ;

Kim, DS ;

Yee, DS ;

Horning, R ;

Goldenberg, B .

PHYSICAL REVIEW B, 1997, 56 (03) :1077-1080

[2]

GARMIRE E, 1999, NONLINEAR OPTICS SEM, V2, pCH2

[3] HOT-CARRIER COULOMB EFFECTS IN GAAS INVESTIGATED BY FEMTOSECOND SPECTROSCOPY AROUND THE BAND EDGE [J].

GONG, T ;

NIGHAN, WL ;

FAUCHET, PM .

APPLIED PHYSICS LETTERS, 1990, 57 (25) :2713-2715

[4] Optical nonlinearities and phase relaxation of excitons in GaN [J].

Hazu, K ;

Shikanai, A ;

Sota, T ;

Suzuki, K ;

Adachi, S ;

Chichibu, SF ;

Mukai, T .

PHYSICAL REVIEW B, 2002, 65 (19) :1952021-1952028

[5] COHERENT COUPLING EFFECTS IN PUMP-PROBE MEASUREMENTS WITH COLLINEAR, COPROPAGATING BEAMS [J].

HEINZ, TF ;

PALFREY, SL ;

EISENTHAL, KB .

OPTICS LETTERS, 1984, 9 (08) :359-361

[6] Femtosecond dynamics of exciton bleaching in bulk GaN at room temperature [J].

Huang, YC ;

Chern, GW ;

Lin, KH ;

Liang, JC ;

Sun, CK ;

Hsu, CC ;

Keller, S ;

DenBaars, SP .

APPLIED PHYSICS LETTERS, 2002, 81 (01) :85-87

[7] Femtosecond Z-scan measurement of GaN [J].

Huang, YL ;

Sun, CK ;

Liang, JC ;

Keller, S ;

Mack, MP ;

Mishra, UK ;

DenBaars, SP .

APPLIED PHYSICS LETTERS, 1999, 75 (22) :3524-3526

[8]

JHO YD, CONDMAT0302280

[9] FEMTOSECOND-PULSE DISTORTION IN QUANTUM-WELLS [J].

KIM, DS ;

SHAH, J ;

MILLER, DAB ;

DAMEN, TC ;

SCHAFER, W ;

PFEIFFER, L .

PHYSICAL REVIEW B, 1993, 48 (24) :17902-17905

[10] Two-photon absorption in GaN, GaInN, and GaAlN alloys [J].

Krishnamurthy, S ;

Nashold, K ;

Sher, A .

APPLIED PHYSICS LETTERS, 2000, 77 (03) :355-357