In(Ga)As quantum rings for terahertz detectors
Journal
Japanese Journal of Applied Physics
Journal Volume
47
Journal Issue
4 PART 2
Pages
2924-2926
Date Issued
2008
Author(s)
Abstract
The In(Ga)As quantum ring infrared photodetector (QRIP) were investigated. The quantum ring (QR) is transformed from 500°C grown 2.2 ML quantum dot (QD) with QD annealing time ∼30 s. The QRs show the broad PL spectrum which is blue shifted from QD about 100meV. The resultant QRIP is a broadband terahertz detector. The response extends from 3 to 100THz with peak responsivity of 127 mA/W at 23 μm which has a spectral detectivity of 2.3 × 10 11 cmHz1/2/W at 10 K under 1.2 V bias. © 2008 The Japan Society of Applied Physics.
Subjects
Far-infrared; Quantum dots; Quantum rings; Terahertz detector
Other Subjects
Annealing; Detectors; Gallium; Indium arsenide; Nanorings; Nanostructures; Optical waveguides; Optoelectronic devices; Quantum electronics; Annealing times; Broadband terahertz; Detectivity; Far-infrared; Infrared photodetectors; Peak responsivity; PL spectrums; Quantum dot; Quantum dots; Quantum ring; Quantum rings; Spectral; Terahertz detector; Terahertz detectors; Semiconductor quantum dots
Type
journal article