Intraband carrier photoexcitation in quantum dot lasers

We unveil the role of bound-to-continuum photoexcitation of carriers as a relevant process that affects the performance of quantum dot (OD) lasers. We present the response of an InAs/InGaAs QD laser to a sub-band gap pump, showing an unexpected depletion of the emitted photons. We relate this observation with carrier photoexcitation through additional transmission and photocurrent measurements. We provide a theoretical support to the experimental data and highlight the important role of this process in the laser characteristics.


Published in:
Nano Letters, 8, 881-885
Year:
2008
Publisher:
American Chemical Society
ISSN:
1530-6984
Keywords:
Laboratories:




 Record created 2010-11-30, last modified 2018-03-17

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