Single-Photon Detectors in the Terahertz Range
- 1 June 2010
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Selected Topics in Quantum Electronics
- Vol. 17 (1), 54-66
- https://doi.org/10.1109/jstqe.2010.2048893
Abstract
Semiconductor quantum dot detectors as well as semiconductor charge-sensitive infrared phototransistors are described. They are the only detectors that can count single photons in the terahertz region at present. In terms of the noise equivalent power (NEP), the detectors realize experimental values on the order of 10-21 W/Hz1/2, while theoretically expected values are even much lower, on the order of 10-24 W/Hz1/2. These NEP values are by several orders of magnitude lower than any other state-of-the-art highly sensitive detectors. In addition to the outstanding sensitivity, the detectors are featured by strong advantage of huge current responsivity (106-1010 A/W ) and extremely large dynamic range of response (106-108). The mechanism of detection as well as application of the detectors is discussed.Keywords
This publication has 46 references indexed in Scilit:
- Sensing individual terahertz photonsNanotechnology, 2010
- Terahertz sensing with a carbon nanotube/two-dimensional electron gas hybrid transistorApplied Physics Letters, 2009
- Point contact readout for a quantum dot terahertz sensorApplied Physics Letters, 2008
- A Highly Sensitive Detector for Radiation in the Terahertz RegionIEEE Transactions on Instrumentation and Measurement, 2007
- A sensitive double quantum well infrared phototransistorJournal of Applied Physics, 2006
- Metastable excited states of a closed quantum dot probed by an aluminum single-electron transistorPhysical Review B, 2006
- Sensitive detector for a passive terahertz imagerJournal of Applied Physics, 2006
- Near-infrared optical sensors based on single-walled carbon nanotubesNature Materials, 2004
- Single-electron transistor strongly coupled to an electrostatically defined quantum dotApplied Physics Letters, 2000
- Observation of single-electron charging effects in small tunnel junctionsPhysical Review Letters, 1987