Title :
Imaging by THz single photon counting
Author :
Ikushima, Kenji ; Komiyama, Susumu
Author_Institution :
Dept. of Basic Sci., Tokyo Univ., Tokyo
Abstract :
THz photon-counting microscope is developed with quantum-dot single photon detectors. The photon detector is incorporated into a scanning confocal optical system which consists of aplanatic Si-hyperhemisphere lenses. A spatial resolution of 0.05 mm is achieved for a free space wavelength of 0.13 mm. We use the microscope to probe extremely weak inter-Landau level emission in quantum Hall effect devices, which uncovers nonequilibrium electrons generated by quantum electron transports.
Keywords :
Landau levels; photon counting; quantum Hall effect; submillimetre wave imaging; Si-hyperhemisphere lenses; THz photon-counting microscope; Thz imaging; interLandau level emission; quantum Hall effect devices; quantum electron transports; quantum-dot single photon detectors; scanning confocal optical system; Detectors; Electron emission; Electron microscopy; Electron optics; Lenses; Optical imaging; Probes; Quantum dots; Spatial resolution; Stimulated emission; Microscopy; Quantum Hall effect; Quantum dots;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516530
