Intraband carrier photoexcitation in quantum dot lasers.
basic_science · Level V
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- Record sourced from PubMed, PMID 18278879.
- Also identified by DOI 10.1021/nl073115a.
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Abstract
We unveil the role of bound-to-continuum photoexcitation of carriers as a relevant process that affects the performance of quantum dot (QD) 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.