γγ PHYSICS WITH VIRTUAL BREMSSTRAHLUNG

1996 ◽  
Vol 11 (09) ◽  
pp. 1645-1647
Author(s):  
S. YELLIN
Keyword(s):  
Mass Shell ◽  
Laser Beams ◽  
Two Photon ◽  
Virtual Photons

Collisions of virtual photons will be a useful source of luminosity for two-photon physics before the availability of backscattered laser beams, and are also required for physics that depend on one or both of the photons being off their mass shell.

scholarly journals Two-photon excitation in living cells induced by low-power cw laser beams

1996 ◽  
Author(s):  
Karsten Koenig ◽  
Tatiana B. Krasieva ◽  
Yagang Liu ◽  
Michael W. Berns ◽  
Bruce J. Tromberg
Keyword(s):  
Low Power ◽  
Living Cells ◽  
Laser Beams ◽  
Two Photon ◽  
Cw Laser ◽  
Photon Excitation ◽  
Two Photon Excitation

Investigation of 6S 1/2–8S 1/2 two-photon transition of cesium atoms by a single 822 nm laser

2021 ◽  
Vol 19 (2) ◽  
pp. 025201
Author(s):  
Ning Liu ◽  
Sandan Wang ◽  
Jinpeng Yuan ◽  
Lirong Wang ◽  
Liantuan Xiao ◽  
...  
Keyword(s):  
Frequency Standard ◽  
Laser Beams ◽  
Fluorescence Signal ◽  
Frequency Reference ◽  
Two Photon ◽  
Photon Transition ◽  
Fabry Perot ◽  
Experimental Parameters ◽  
Stable Frequency ◽  
Vapor Temperature

Abstract We experimentally investigate the 6S 1/2–8S 1/2 two-photon transition in cesium vapor by a single laser. A blue (455.5 and 459.3 nm) fluorescence signal is observed as a result of 822.5 nm laser beams illuminating the Cs vapor with a counter-propagating configuration. The dependences of the fluorescence intensity on the polarization combinations of the laser beams, laser power and vapor temperature are studied to obtain optimal experimental parameters. The frequency difference between the two hyperfine components of 4158 (7) MHz is measured with a Fabry–Perot interferometer as a frequency reference. Such a large spectral isolation and the insensitivity to the Earth’s magnetic field enable the 6S 1/2–8S 1/2 transition to be a stable frequency standard candidate for a frequency-doubled 1644 nm laser in the U-band window for quantum telecommunication.

``Entangled'' free-induction decay in CdS crystal under two-photon excitation by two crossed laser beams

2012 ◽  
Vol 9 (9) ◽  
pp. 654-657 ◽  
Author(s):  
A V Leontiev ◽  
V S Lobkov ◽  
T G Mitrofanova ◽  
A G Shmelyov ◽  
V V Samartsev
Keyword(s):  
Free Induction Decay ◽  
Laser Beams ◽  
Two Photon ◽  
Photon Excitation ◽  
Free Induction ◽  
Two Photon Excitation

scholarly journals Action of counter-propagating laser beams on two-photon excitation of potassium vapour

2010 ◽  
Vol 43 (5) ◽  
pp. 055401 ◽  
Author(s):  
T Efthimiopoulos ◽  
N Merlemis ◽  
M E Movsessian ◽  
D Pentaris ◽  
M Katharakis
Keyword(s):  
Laser Beams ◽  
Two Photon ◽  
Photon Excitation ◽  
Two Photon Excitation

Two-photon photopolymerization with multiple laser beams

2016 ◽  
Author(s):  
Petr Jákl ◽  
Jiří Skalický ◽  
Jan Ježek ◽  
Mojmír Šerý ◽  
Dušan Novotný ◽  
...  
Keyword(s):  
Laser Beams ◽  
Two Photon

scholarly journals Temperature measurements of optically cooled calcium atoms using differential two-photon spectroscopy

2019 ◽  
Vol 485 (3) ◽  
pp. 281-284
Author(s):  
A. A. Bobrov ◽  
E. V. Vilshanskaya ◽  
I. D. Arshinova ◽  
S. A. Saakyan ◽  
V. A. Sautenkov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Optical Trap ◽  
Temperature Measurements ◽  
Laser Beams ◽  
Magneto Optical Trap ◽  
Frequency Detuning ◽  
Two Photon ◽  
Rydberg Transition ◽  
Resonance Laser ◽  
Cooling Laser

A differential two-photon method of measuring the temperature of 40Ca atoms in a continuously operating magneto-optical trap is demonstrated. Coherent two-photon resonances at the 4s2 1S0-50 1S0 Rydberg transition have been investigated experimentally using resonance laser beams propagating at different angles. The tempera­ture of the cloud of 40Ca atoms was measured depending on the frequency detuning of the cooling laser radiation.

Sign in / Sign up

Export Citation Format

Share Document