Extraction-Dominated Temperature Degradation of Population Inversion in Terahertz Quantum Cascade Lasers.
Sign Up to like & getrecommendations! Published in 2022 at "Small"
DOI: 10.1002/smll.202106943
Abstract: Degraded population inversion (PI) at elevated temperature, regarded as an important temperature degradation factor in terahertz quantum cascade lasers (THz QCL), has hindered the widespread use of these devices. Herein, the mechanism of the temperature… read more here.
Keywords: population inversion; temperature degradation; extraction; terahertz quantum ... See more keywords
Atomic population inversion and absorption dispersion-spectra driven by modified double-exponential quotient pulses in a three-level atom
Sign Up to like & getrecommendations! Published in 2021 at "Results in physics"
DOI: 10.1016/j.rinp.2021.104108
Abstract: Abstract In this study, we control a three-level atomic system using a typical strong control field with a modified quotient double exponential form (modified QEXP). The considered atomic configuration is a V-type three-level system in… read more here.
Keywords: double exponential; atomic population; level; three level ... See more keywords
Laser-Induced Population Inversion in Rhodamine 6G for Lysozyme Oligomer Detection.
Sign Up to like & getrecommendations! Published in 2017 at "Biochemistry"
DOI: 10.1021/acs.biochem.7b00243
Abstract: Fluorescence spectroscopy is a common method for detecting amyloid fibrils in which organic fluorophores are used as markers that exhibit an increase in quantum yield upon binding. However, most of the dyes exhibit enhanced emission… read more here.
Keywords: population inversion; methodology; laser; rhodamine ... See more keywords
Population Inversion and Dirac Fermion Cooling in 3D Dirac Semimetal Cd3As2.
Sign Up to like & getrecommendations! Published in 2022 at "Nano letters"
DOI: 10.1021/acs.nanolett.1c04250
Abstract: Revealing the ultrafast dynamics of three-dimensional (3D) Dirac fermions is critical for both fundamental science and device applications. So far, how the cooling of 3D Dirac fermions differs from that of two-dimensional (2D) and whether… read more here.
Keywords: population inversion; inversion; dirac semimetal; cooling dirac ... See more keywords
Strong Light-Field Driven Nanolasers
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DOI: 10.1021/acs.nanolett.9b00510
Abstract: Einstein established the quantum theory of radiation and paved the way for modern laser physics including single-photon absorption by charge carriers and finally pumping an active gain medium into population inversion. This can be easily… read more here.
Keywords: population inversion; light field; population; strong light ... See more keywords
Two-level masers as heat-to-work converters
Sign Up to like & getrecommendations! Published in 2018 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.1805354115
Abstract: Significance We propose a paradigm of heat-powered maser. In contrast to textbook knowledge, it does not require population inversion or coherent driving and hence can operate with a two-level working medium. Therefore, it is a… read more here.
Keywords: heat; two level; population inversion; heat work ... See more keywords