Tunable lasers and detectors in the FIR
| Autor: | Wolfgang Heiss, Erich Gornik, V. Rosskopf |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Materials science
Spectrometer business.industry Photoconductivity Quantum wire Detector Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Condensed Matter::Materials Science Narrowband law Optoelectronics Stimulated emission business Voltage |
| Zdroj: | Infrared Physics & Technology. 36:113-122 |
| ISSN: | 1350-4495 |
| DOI: | 10.1016/1350-4495(94)00100-y |
| Popis: | The presently available tunable and narrowband FIR detectors use radiative transitions between Landau levels as selective photoconductive process. Significant improvements in the performance of InSb detectors can be achieved by special surface treatment and meander structuring. High resolution photoconductive spectrometers can be realized with high purity GaAs bulk and two-dimensional material. A narrowband photoconductive detector signal is demonstrated with quantum wire structures which have the potential for voltage tunable and narrowband detectivity. The demonstration of stimulated emission from p -Ge in crossed electric and magnetic fields provides a magnetically tunable narrow line (0.2 cm −1 ) source of considerable power for spectroscopic applications. High resolution transmission spectroscopy is demonstrated by measuring the absorption coefficient of shallow donors in bulk Ge. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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