title: Intraband carrier photoexcitation in quantum dot lasers.
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.
authors.affiliation: Ecole Polytechnique Fédérale de Lausanne, Institute of Quantum Electronics and Photonics, Switzerland. pablo.moreno@epfl.ch
authors.forename: P
authors.initials: P
authors.lastname: Moreno
authors.forename: M
authors.initials: M
authors.lastname: Richard
authors.forename: M
authors.initials: M
authors.lastname: Rossetti
authors.forename: M
authors.initials: M
authors.lastname: Portella-Oberli
authors.forename: L H
authors.initials: LH
authors.lastname: Li
authors.forename: B
authors.initials: B
authors.lastname: Deveaud-Plédran
authors.forename: A
authors.initials: A
authors.lastname: Fiore