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- W2131607118 abstract "Summary form only given. The authors present evidence of nonlinear optical rectification in compositionally asymmetrical GaAs/AlGaAs MQWs (multi-quantum wells). The structure consisted of 12 periods of 30-AA GaAs-65-AA Al/sub 0.2/Ga/sub 0.8/As wells separated by 500-AA Al/sub 0.4/Ga/sub 0.6/As barriers, epitaxially grown on a 3*10/sup 18/ cm/sup -3/ Si-doped GaAs wafer. The GaAs well is 3*10/sup 17/ cm/sup -3/ Si doped, while the rest of the wells and barriers are nonintentionally doped. A 3000-AA 10/sup 18/-cm/sup -3/ Si-doped GaAs contact layer is grown. The optical rectification is measured at 77 K as a bias appearing at the diode electrodes (with no photocurrent) when it is illuminated by a 10.6- mu m CO/sub 2/ laser. An optical rectification coefficient chi ( omicron = omega - omega ) of 5*10/sup -6/ m/V for each well was determined that is an effective electrooptical coefficient of 4.5*10/sup -9/ m/V in the whole structure. This value of chi ( omicron = omega - omega ) is more than three orders of magnitude higher than in a natural nonlinear medium such as GaAs or InP at 10.6 mu m. This structure can thus be used as a highly effective electrooptic medium in infrared waveguides. >" @default.
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- W2131607118 date "1989-11-01" @default.
- W2131607118 modified "2023-09-24" @default.
- W2131607118 title "Non-linear optical rectification at 10.6 mu m in compositionally asymmetrical GaAs/AlGaAs multi-quantum wells" @default.
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- W2131607118 doi "https://doi.org/10.1109/16.43723" @default.
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