Quantum-dot photon detectors and photon-counting terahertz imaging
Quantum-dot photon detectors and photon-counting terahertz imaging
- Neue Suche nach: Ikushima, K.
- Neue Suche nach: Hasegawa, T.
- Neue Suche nach: Komiyama, S.
- Neue Suche nach: Ueda, T.
- Neue Suche nach: Hirakawa, K.
- Neue Suche nach: Ikushima, K.
- Neue Suche nach: Hasegawa, T.
- Neue Suche nach: Komiyama, S.
- Neue Suche nach: Ueda, T.
- Neue Suche nach: Hirakawa, K.
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.
Dokumentinformationen
Quantum-dot photon detectors and photon-counting terahertz imaging
2005-01-01
2019724 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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