Photon-counting microscopy imaging in the terahertz (THz) region has been realized with a resolution of 0.05mm for a free space wavelength of 0.13mm. The system incorporates quantum-dot photon detectors into a scanning confocal optical microscope. Minimal requirements for practical application have been fulfilled by improving the operation speed of photon detection by a factor of 100, expanding the operation temperatures beyond 0.3 K and achieving a dynamic range more than 30dB. We use this microscope to probe extremely weak cyclotron emission with less than femto-watt powers radiated from quantum Hall effect devices, which leads to direct visualization of nonequilibrium electrons generated between Landau levels.
Quantum-dot photon detectors and photon-counting terahertz imaging
2005-01-01
2019724 byte
Conference paper
Electronic Resource
English
TB2-3 Quantum-dot Photon Detectors And Photon-Counting Terahertz Imaging
British Library Conference Proceedings | 2005
|Silicon photon-counting detectors enable next-generation imaging
British Library Online Contents | 2006
|Planar architecture optimizes Si single-photon-counting detectors
British Library Online Contents | 2011
|Performance of imaging photon-counting intensifiers
SPIE | 1998
|