Photon-counting microscopy of terahertz radiation
- 10 April 2006
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 88 (15), 152110
- https://doi.org/10.1063/1.2194473
Abstract
Photon-counting imaging of terahertz radiation is demonstrated with a spatial resolution of 50 μ m for a free-space wavelength of 132 μ m by incorporating a quantum-dot single photondetector into a scanning confocal optical system. Terahertz radiation of 10 − 19 – 10 − 16 W or 10 2 – 10 5 photons ∕ s is imaged. Applying the microscope to the study of semiconductor quantum Hall devices, a threshold behavior of the cyclotron emission is found and the mechanism is discussed.Keywords
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