Laughton, F.R., Marsh, J.H. and Button, C. (1992) Time-resolved nonlinear absorption modulation in GaAs/AlGaAs multiple-quantum-well waveguides at 1.06 mu m. IEEE Photonics Technology Letters, 4(8), pp. 863-866. (doi: 10.1109/68.149889)
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Abstract
Time-resolved nonlinear absorption modulation due to two-photon absorption (TPA) and free carrier absorption (FCA) was demonstrated in GaAs/AlGaAs waveguides at 1.06 mu m. For a peak input intensity of 4.5*10/sup 11/ Wm/sup -2/, there was a maximum absorption modulation of 35%. This was caused by TPA, so that the recovery time was limited by the laser pulsewidth alone. At a peak input intensity of 1.5*10/sup 12/ Wm/sup -2/, a 65% absorption modulation was observed. This consisted of two components: an instantaneous effect due to TPA and also a slower component, attributed to FCA, whose recovery time was limited by the carrier lifetime. A theoretical model was also derived which provided a good fit to the experimental data.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Marsh, Professor John |
| Authors: | Laughton, F.R., Marsh, J.H., and Button, C. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | IEEE Photonics Technology Letters |
| Publisher: | IEEE |
| ISSN: | 1041-1135 |
| ISSN (Online): | 1941-0174 |
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