| Autor: |
Eric L. Martinet, James S. Harris, Gary L. Woods, Martin M. Fejer, Bruce A. Richman, Chris W. Rella, Herman C. Chui |
| Rok vydání: |
1994 |
| Předmět: |
|
| Zdroj: |
Quantum Well and Superlattice Physics V. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.175710 |
| Popis: |
Conduction band intersubband absorption and second harmonic generation (SHG) are demonstrated in doubly resonant asymmetric step high indium content quantum wells (QW) grown on a GaAs substrate. Intersubband absorption peaks at 5.51 micrometers and 3.05 micrometers corresponding to the 1 to 2 and 1 to 3 transitions are measured. The susceptibility of SHG from the QW, (Chi) QW(2), is measured using a free electron laser by interference between the SHG fields generated from the QW and the GaAs substrate. A large asymmetry in the SHG power with rotation angle of the sample arising from (Chi) QW(2) is observed. The magnitude and phase of (Chi) QW(2) is measured in the 4.6 - 6.3 micrometers pump wavelength range. (Chi) QW(2) is of maximum amplitude at 6.0 micrometers with a value of 145 +/- 20 nm/V. A change in the sign of the phase of (Chi) QW(2) within the SHG resonance is demonstrated for the first time. Agreement of both the linear and nonlinear properties to a simple model assuming Lorentzian linewidths is discussed. SHG of 2.0 micrometers light is also demonstrated in coupled In0.60Ga0.40As/AlAs quantum wells.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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