Memorias de investigación
Ponencias en congresos:
Optically triggered infrared photodetector
Año:2015
Áreas de investigación
  • Dispositivos electrónicos,
  • Células solares,
  • Tecnología de dispositivos para ingeniería eléctrica y electrónica
Datos
Descripción
We present and demonstrate experimentally a new kind of semiconductor device: the Optically Triggered Infrared Photodetector. This IR photodetector exhibits the following distinctive features: (1) It can be optically commuted ON and OFF by means of an external light bias, and (2) it does not require electrical power supply. The operation principle of the OTIP is as follows. External high-energy (higher than the semiconductor bandgap) light produces photocurrent in the device. Part of this current is lost as recombination through an intermediate band (IB) [1] within the bandgap of the semiconductor. The addition of IR light reduces such recombination and can be, therefore, measured as an increase in current. This new detector concept can be implemented by including quantum dots (QDs) in-between a p-n junction [2]. We demonstrate the operation of the OTIP in an InAs/AlGaAs QD-based device. Our experimental device shows response to normally incident light in the 2?6 ?m range when externally biased by a 590-nm light emitting diode (LED). It also exhibits IR detection driven by a continuous range of photon energies above the bandgap of the device. Furthermore, we demonstrate an increase in detection gain with increasing light-bias intensity. For high intensities the photo-detection seems to saturate. In our experiments, the increase in detection gain did not come with an increase in the measurement noise; hence, it can be understood as an increase in the detectivity. The novel features of the OTIP opens up possibilities for new device applications, for instance, in optical communications.
Internacional
Si
Nombre congreso
12th International Conference on Nanosciences & Nanotechnologies (NN15)
Tipo de participación
960
Lugar del congreso
Thessaloniki (Grecia)
Revisores
Si
ISBN o ISSN
00-0000-000-0
DOI
Fecha inicio congreso
07/07/2015
Fecha fin congreso
10/07/2015
Desde la página
1
Hasta la página
3
Título de las actas
Proc. NN15
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Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Departamento: Electrónica Física
  • Centro o Instituto I+D+i: Instituto de Energía Solar