Green, R.P., Tredicucci, A., Vinh, N.Q., Murdin, B., Pidgeon, C., Beere, H.E. and Ritchie, D.A. (2009) Gain recovery dynamics of a terahertz quantum cascade laser. Physical Review B, 80(7), (doi: 10.1103/PhysRevB.80.075303)
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Abstract
The gain recovery time of a bound-to-continuum terahertz quantum cascade laser is measured using a stimulated emission photocurrent technique. At low temperatures a value similar to 50 ps is found. This tends to decrease with rising temperature, and suggests that class B laser dynamics should be expected from these devices. Both the value and the trend in the gain recovery time are found to be consistent with hopping transport through the miniband. Power-dependent measurements of the photocurrent clearly show the effects of inhomogeneous broadening of the gain transition
| Item Type: | Articles |
|---|---|
| Keywords: | device devices DYNAMICS EMISSION GAIN LASER low-temperature OSCILLATION quantum cascade laser SEMICONDUCTOR SUPERLATTICES TEMPERATURE terahertz time transition TRANSPORT |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Green, Dr Richard |
| Authors: | Green, R.P., Tredicucci, A., Vinh, N.Q., Murdin, B., Pidgeon, C., Beere, H.E., and Ritchie, D.A. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Physical Review B |
| Publisher: | American Physical Society |
| ISSN: | 1098-0121 |
| ISSN (Online): | 1550-235X |
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