Tunable quantum cascade lasers operating in the terahertz frequency range are demonstrated. By using an external cavity based on the reflection from a movable mirror, both broad and fine tuning of the frequency are achieved by varying the cavity length. Coarse tuning up to 3 cm-1 is obtained near the center frequency of 4.8 THz (∼160 cm-1), and continuous mode-hop-free tuning is observed over ∼ 0.4 cm-1, nearly corresponding to the cavity free spectral range.
Autori interni: | |
Autori: | Jihua, Xu; JOEL M., Hensley; D. B., Fenner; RICHARD P., Green; Lukas, Mahler; Tredicucci, Alessandro; MARK G., Allen; Fabio, Beltram; HARVEY E., Beere; DAVID A., Ritchie |
Titolo: | Tunable terahertz quantum cascade lasers with an external cavity |
Anno del prodotto: | 2007 |
Digital Object Identifier (DOI): | 10.1063/1.2786587 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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