title: Optically triggered infrared photodetector.
abstract: We demonstrate a new class of semiconductor device: the optically triggered infrared photodetector (OTIP). This photodetector is based on a new physical principle that allows the detection of infrared light to be switched ON and OFF by means of an external light. Our experimental device, fabricated using InAs/AlGaAs quantum-dot technology, demonstrates normal incidence infrared detection in the 2-6 μm range. The detection is optically triggered by a 590 nm light-emitting diode. Furthermore, the detection gain is achieved in our device without an increase of the noise level. The novel characteristics of OTIPs open up new possibilities for third generation infrared imaging systems ( Rogalski, A.; Antoszewski, J.; Faraone, L. J. Appl. Phys. 2009, 105 (9), 091101).
authors.affiliation: Instituto de Energía Solar, Universidad Politécnica de Madrid , ETSI Telecomunicación, 28040 Madrid, Spain.
authors.forename: Íñigo
authors.initials: Í
authors.lastname: Ramiro
authors.forename: Antonio
authors.initials: A
authors.lastname: Martí
authors.forename: Elisa
authors.initials: E
authors.lastname: Antolín
authors.forename: Esther
authors.initials: E
authors.lastname: López
authors.forename: Alejandro
authors.initials: A
authors.lastname: Datas
authors.forename: Antonio
authors.initials: A
authors.lastname: Luque
authors.forename: José M
authors.initials: JM
authors.lastname: Ripalda
authors.forename: Yolanda
authors.initials: Y
authors.lastname: González
keywords: Photodetector; infrared; intermediate band; quantum dots