The hydrogen two-photon emission spectrum of moderately dense plasmas

1981 ◽  
Vol 248 ◽  
pp. 380 ◽  
Author(s):  
S. A. Drake ◽  
R. K. Ulrich
Keyword(s):  
Emission Spectrum ◽  
Photon Emission ◽  
Dense Plasmas ◽  
Two Photon

Two-photon emission spectrum of a two-level atom in an ideal cavity

1994 ◽  
Vol 49 (5) ◽  
pp. 4009-4015 ◽  
Author(s):  
Lin-sheng He ◽  
Xun-li Feng
Keyword(s):  
Emission Spectrum ◽  
Photon Emission ◽  
Two Photon ◽  
Level Atom

Two-photon emission spectrum

1987 ◽  
Vol 36 (8) ◽  
pp. 3904-3908 ◽  
Author(s):  
H. R. Zaidi
Keyword(s):  
Emission Spectrum ◽  
Photon Emission ◽  
Two Photon

FEASIBILITY OF THE TWO PHOTON EMISSION ATOMIC PHOSPHOR

1996 ◽  
Vol 80 (Appendix) ◽  
pp. 339-340
Author(s):  
Makoto Toho ◽  
Hideyoshi Kimura
Keyword(s):  
Photon Emission ◽  
Two Photon

Pulse amplification by stimulated two-photon emission

1970 ◽  
Vol 31 (5) ◽  
pp. 256-257 ◽  
Author(s):  
L.L. Hope ◽  
M.O. Vassell
Keyword(s):  
Photon Emission ◽  
Pulse Amplification ◽  
Two Photon

scholarly journals Tailoring and enhancing spontaneous two-photon emission using resonant plasmonic nanostructures

2012 ◽  
Vol 86 (3) ◽  
Author(s):  
Alexander N. Poddubny ◽  
Pavel Ginzburg ◽  
Pavel A. Belov ◽  
Anatoly V. Zayats ◽  
Yuri S. Kivshar
Keyword(s):  
Photon Emission ◽  
Plasmonic Nanostructures ◽  
Two Photon

A fluorescence enhancement assay of cell fusion

1977 ◽  
Vol 28 (1) ◽  
pp. 167-177
Author(s):  
P.M. Keller ◽  
S. Person ◽  
W. Snipes
Keyword(s):  
Absorption Spectrum ◽  
Energy Transfer ◽  
Emission Spectrum ◽  
Cell Fusion ◽  
Saturated Hydrocarbon ◽  
Photon Emission ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Hydrocarbon Chains ◽  
Fluorescent Molecules

Two probes were synthesized which consist of fluorescent molecules conjugated to saturated hydrocarbon chains, 18 carbons long, to ensure their localization into cellular membranes. There is an overlap between the emission spectrum of one probe (donor) and the absorption spectrum of the other probe (acceptor). By the use of appropriate wavelengths it is possible to specifically excite the donor probe and record the fluorescence of the acceptor probe. Two cell populations, each labelled with one of the probes, were infected with a virus that causes cell fusion, mixed in equal proportions, and the fluorescence of the acceptor probe measured as a function of time after infection. An increase in fluorescence was observed beginning at the time of onset of cell fusion indicating a mixing of the fluorescent membrane molecules. An investigation of the distance dependence indicated that the increase in fluorescence was mainly due to resonance energy transfer and not to photon emission and reabsorption. Resonance energy transfer requires that the 2 probes be close together and that there be an overlap of the emission spectrum of the donor probe and the absorption spectrum of the acceptor probe. The possible application of this assay to other types of membrane fusion is noted.

scholarly journals Quantum states of an electromagnetic field interacting with a classical current and their applications to radiation problems

2020 ◽  
Vol 27 (4) ◽  
pp. 902-911
Author(s):  
V. G. Bagrov ◽  
D. M. Gitman ◽  
A. A. Shishmarev ◽  
A. J. D. Farias
Keyword(s):  
Electromagnetic Field ◽  
Synchrotron Radiation ◽  
Dirac Equation ◽  
Photon Emission ◽  
Quantum States ◽  
Photon Radiation ◽  
Electric Currents ◽  
Scalar Particles ◽  
Two Photon ◽  
The Relationship

Synchrotron radiation was originally studied by classical methods using the Liénard–Wiechert potentials of electric currents. Subsequently, quantum corrections to the classical formulas were studied, considering the emission of photons arising from electronic transitions between spectral levels, described in terms of the Dirac equation. In this paper, an intermediate approach is considered, in which electric currents generating the radiation are considered classically while the quantum nature of the radiation is taken into account exactly. Such an approximate approach may be helpful in some cases; it allows one to study one-photon and multi-photon radiation without complicating calculations using corresponding solutions of the Dirac equation. Here, exact quantum states of an electromagnetic field interacting with classical currents are constructed and their properties studied. With their help, the probability of photon emission by classical currents is calculated and relatively simple formulas for one-photon and multi-photon radiation are obtained. Using the specific circular electric current, the corresponding synchrotron radiation is calculated. The relationship between the obtained results and those known before are discussed, for example with the Schott formula, with Schwinger calculations, with one-photon radiation of scalar particles due to transitions between Landau levels, and with some previous results of calculating two-photon synchrotron radiation.

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