Stimulated emission induced by two-photon absorption in GaAs quantum wells

1991 ◽  
Vol 44 (15) ◽  
pp. 8384-8386 ◽  
Author(s):  
C. Moro ◽  
M. Lepore ◽  
R. Cingolani ◽  
R. Tommasi ◽  
M. Ferrara ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Stimulated Emission ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Progresses on the Use of Two-Photon Absorption Laser Induced Fluorescence (TALIF) Diagnostics for Measuring Absolute Atomic Densities in Plasmas and Flames

Plasma ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 145-171
Author(s):  
Kristaq Gazeli ◽  
Guillaume Lombardi ◽  
Xavier Aubert ◽  
Corinne Y. Duluard ◽  
Swaminathan Prasanna ◽  
...  
Keyword(s):  
Optical Transition ◽  
Thin Film Deposition ◽  
Laser Induced Fluorescence ◽  
Film Deposition ◽  
Stimulated Emission ◽  
Photon Absorption ◽  
Collisional Quenching ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Wide Range

Recent developments in plasma science and technology have opened new areas of research both for fundamental purposes (e.g., description of key physical phenomena involved in laboratory plasmas) and novel applications (material synthesis, microelectronics, thin film deposition, biomedicine, environment, flow control, to name a few). With the increasing availability of advanced optical diagnostics (fast framing imaging, gas flow visualization, emission/absorption spectroscopy, etc.), a better understanding of the physicochemical processes taking place in different electrical discharges has been achieved. In this direction, the implementation of fast (ns) and ultrafast (ps and fs) lasers has been essential for the precise determination of the electron density and temperature, the axial and radial gradients of electric fields, the gas temperature, and the absolute density of ground-state reactive atoms and molecules in non-equilibrium plasmas. For those species, the use of laser-based spectroscopy has led to their in situ quantification with high temporal and spatial resolution, with excellent sensitivity. The present review is dedicated to the advances of two-photon absorption laser induced fluorescence (TALIF) techniques for the measurement of reactive species densities (particularly atoms such as N, H and O) in a wide range of pressures in plasmas and flames. The requirements for the appropriate implementation of TALIF techniques as well as their fundamental principles are presented based on representative published works. The limitations on the density determination imposed by different factors are also discussed. These may refer to the increasing pressure of the probed medium (leading to a significant collisional quenching of excited states), and other issues originating in the high instantaneous power density of the lasers used (such as photodissociation, amplified stimulated emission, and photoionization, resulting to the saturation of the optical transition of interest).

Two-Photon Absorption And Time-Resolved Stimulated Emission Depletion Spectroscopy Of A New Push-Pull Fluorene Derivative

2013 ◽  
Author(s):  
Kevin D. Belfield ◽  
Mykhailo V. Bondar ◽  
Alma R. Morales ◽  
Xiling Yue ◽  
Gheorghe Luchita ◽  
...  
Keyword(s):  
Stimulated Emission ◽  
Photon Absorption ◽  
Time Resolved ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Fluorene Derivative ◽  
Stimulated Emission Depletion

Two-photon absorption spectroscopy in GaAs quantum wells

1989 ◽  
Vol 62 (15) ◽  
pp. 1784-1787 ◽  
Author(s):  
K. Tai ◽  
A. Mysyrowicz ◽  
R. J. Fischer ◽  
R. E. Slusher ◽  
A. Y. Cho
Keyword(s):  
Quantum Wells ◽  
Absorption Spectroscopy ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

Two-photon absorption processes in GaAs/Al x Ga1−x As quantum wells

1990 ◽  
Vol 12 (10) ◽  
pp. 1465-1474 ◽  
Author(s):  
I. M. Catalano ◽  
A. Cingolani ◽  
M. Lepore ◽  
R. Cingolani ◽  
K. Ploog
Keyword(s):  
Quantum Wells ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Investigation of Femtosecond IR Radiation Two-Photon Absorption by Pump-Probe Method in GaAs (001) Plate Reflection

2019 ◽  
Vol 14 (4) ◽  
pp. 82-90
Author(s):  
N. N. Rubtsova ◽  
G. M. Borisov ◽  
D. V. Ledovskikh
Keyword(s):  
Quantum Wells ◽  
Average Power ◽  
Photon Absorption ◽  
Ir Radiation ◽  
Central Wavelength ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Femtosecond Radiation ◽  
Kinetics Of

The reflection of probe infrared femtosecond radiation pulses from a gallium arsenide substrate of the (001) orientation in the presence of more powerful pump pulses of the same radiation with a peak power of up to 1 GW/cm2 was investigated. A Yb3+:KY(WO4)2 laser with a central wavelength of 1 035 nm, a repetition rate of 70 MHz, a pulse duration of 130 fs, and an average power of not more than 0.9 W worked in the GaAs transparency region. The experimental dependence of the recorded signal on the pump radiation intensity is in qualitative agreement with the model dependence for two-photon absorption. The results are important for the correct interpretation of reflectivity kinetics of quantum wells.

Picosecond Stimulated Emission in a Fluorescent Solution Following Two-Photon Absorption

1971 ◽  
Vol 3 (1) ◽  
pp. 358-364 ◽  
Author(s):  
M. R. Topp ◽  
P. M. Rentzepis
Keyword(s):  
Stimulated Emission ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Two-Photon Absorption and Time-Resolved Stimulated Emission Depletion Spectroscopy of a New Fluorenyl Derivative

ChemPhysChem ◽  
2012 ◽  
Vol 13 (15) ◽  
pp. 3481-3491 ◽  
Author(s):  
Kevin D. Belfield ◽  
Mykhailo V. Bondar ◽  
Alma R. Morales ◽  
Xiling Yue ◽  
Gheorghe Luchita ◽  
...  
Keyword(s):  
Stimulated Emission ◽  
Photon Absorption ◽  
Time Resolved ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Stimulated Emission Depletion
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