TY - GEN
T1 - Recent results in quantum cascade lasers and applications
AU - Gmachl, Claire
AU - Capasso, Federico
AU - Tredicucci, Alessandro
AU - Köhler, Rüdeger
AU - Hutchinson, Albert L.
AU - Sivco, Deborah L.
AU - Baillargeon, James N.
AU - Cho, Alfred Y.
PY - 2000
Y1 - 2000
N2 - Recent advances in quantum cascade (QC) lasers include widely tunable single-mode distributed feedback (DFB) lasers with high optical power at λ ≈ 4.6 μm, and single-mode DFB lasers at λ ≈ 16 μm based on new surface plasmon waveguides with dual-metal gratings. Single-mode and tunable QC-DFB lasers have successfully been used in many collaborations for various trace-gas sensing applications. Examples are the detection of stratospheric methane and nitrous oxide, the sub-ppbv detection of ammonia by cavity ring down spectroscopy, methane concentration and isotopic composition measurements, and the detection of complex molecules in open air by direct absorption spectroscopy. The versatility of band structure engineering enabled the design and realization of QC-lasers, which operate under both, positive and negative polarity displaying distinct characteristics in each polarity if an asymmetric structure is employed.
AB - Recent advances in quantum cascade (QC) lasers include widely tunable single-mode distributed feedback (DFB) lasers with high optical power at λ ≈ 4.6 μm, and single-mode DFB lasers at λ ≈ 16 μm based on new surface plasmon waveguides with dual-metal gratings. Single-mode and tunable QC-DFB lasers have successfully been used in many collaborations for various trace-gas sensing applications. Examples are the detection of stratospheric methane and nitrous oxide, the sub-ppbv detection of ammonia by cavity ring down spectroscopy, methane concentration and isotopic composition measurements, and the detection of complex molecules in open air by direct absorption spectroscopy. The versatility of band structure engineering enabled the design and realization of QC-lasers, which operate under both, positive and negative polarity displaying distinct characteristics in each polarity if an asymmetric structure is employed.
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M3 - Conference contribution
AN - SCOPUS:0034593679
SN - 5936340023
T3 - Proceedings of the 8th International Symposium Nanostructures: Physics and Technology
SP - 546
EP - 550
BT - Proceedings of the 8th International Symposium Nanostructures
A2 - alferov, Zh.
A2 - Esaki, L.
A2 - Alferov, ZH.
A2 - Esaki, L.
T2 - Proceedings of the 8th International Symposium Nanostructures: Physics and Technology
Y2 - 19 June 2000 through 23 June 2000
ER -