DETAILED ANALYSIS OF 2ND-HARMONIC GENERATION NEAR 10.6 MU-M IN GAAS/ALGAAS ASYMMETRIC QUANTUM-WELLS

被引:85
作者
BOUCAUD, P [1 ]
JULIEN, FH [1 ]
YANG, DD [1 ]
LOURTIOZ, JM [1 ]
ROSENCHER, E [1 ]
BOIS, P [1 ]
NAGLE, J [1 ]
机构
[1] THOMSON CSF,CENT RECH LAB,F-91410 ORSAY,FRANCE
关键词
D O I
10.1063/1.103742
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report on the observation of resonant intersubband second-harmonic generation in asymmetric GaAs/AlGaAs quantum wells using a cw or Q-switched tunable CO2 laser as the pumping source. The dependence of the second-harmonic intensity with the pump photon wavelength is presented for the first time. A Lorentzian-like second-harmonic line shape is found with a maximum at 10.9 μm and a linewidth of 0.4 μm (4.1 meV). These results are in good agreement with theoretical predictions. The expected quadratic dependence of the second-harmonic conversion efficiency with pump intensity is well verified for intensities up to 150 kW/cm2. The calibrated second-harmonic power reaches 0.13 μW for a cw pump power of 0.8 W. The value of 7.2×10-7 m/V deduced for the second-order nonlinear susceptibility is about 1900 times greater than that found in bulk GaAs.
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页码:215 / 217
页数:3
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