Conference Paper/Proceeding/Abstract 23940 views
Characterisation of the influence of multi-quantum barrier reflectors within GaInP/AlGaInP quantum well lasers using near-field imaging techniques
Applied Surface Science, Volume: 255, Issue: 3, Pages: 649 - 652
Swansea University Author:
Richard Cobley
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DOI (Published version): 10.1016/j.apsusc.2008.07.062
Abstract
<p>Using a near-field scanning optical microscope, near-field photocurrent and topographic imaging has measured the effect on intrinsic electric fields and photocurrent propagation resulting from inserting multi-quantum barrier (MQB) super-lattices into quantum well lasers. Measurements on dev...
| Published in: | Applied Surface Science |
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| Published: |
2008
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa5731 |
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| Abstract: |
<p>Using a near-field scanning optical microscope, near-field photocurrent and topographic imaging has measured the effect on intrinsic electric fields and photocurrent propagation resulting from inserting multi-quantum barrier (MQB) super-lattices into quantum well lasers. Measurements on devices at two different excitation wavelengths have highlighted the sensitivity of the near-field optical technique. Strong correlations were seen in the photocurrent response of the multi-quantum barrier regions when compared with simulations made on the electric field generated within the structure. As a result, photocurrent attenuation was attributed to carrier confinement in these barrier regions when compared to a control sample. The measurements illustrate the effectiveness of the MQB, in addition to the sensitivity and power of the near-field photocurrent technique.</p> |
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| College: |
Faculty of Science and Engineering |
| Issue: |
3 |
| Start Page: |
649 |
| End Page: |
652 |