Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Review Letters

Standing-Wave—Induced Backward Photon Echoes in Gases

N. W. Carlson, Arjun G. Yodh, THOMAS W. MOSSBERG

Published Jul 4, 1983• 6 citations
Publisher

Abstract

It has been found that a standing-wave pulse may be employed to produce an easily detectable, backward-propagating, phase-conjugate "replica" of any traditional gas-phase photon-echo signal. Standing-wave---induced backward two-pulse photon echoes have been observed in lithium vapor while only apertures were used to block laser background. An interesting dependence of backward echo intensity on standing-wave orientation is observed and discussed.

DOI
10.1103/physrevlett.51.35

Related papers

Storage and phase conjugation of light pulses using stimulated photon echoes

N. W. Carlson, William Randall Babbitt, THOMAS W. MOSSBERG

We experimentally demonstrate that three-excitation-pulse (i.e., stimulated) photon echo signals can be backward-propagating, phase-conjugate replicas of the second echo-excitation pulse. Working on the 555.6-nm absorption line of atomic Yb vapor, echo signals, effectively 0.5% as intense as the second excitation pulse, are shown to reproduce image information carried by the second excitation pulse even when wave-front distorters are employed.

Optics Letters•Dec 1, 1983•44 citations

Standing-Wave Induced Backward Photon Echoes in Gases

N. W. Carlson, Arjun G. Yodh, THOMAS W. MOSSBERG

Springer eBooks•Jan 1, 1984•1 citation

Backward Echo in Two-Level Systems

Masayuki Fujita, Hiroki Nakatsuka, H. Nakanishi +1 more

The possible three-pulse echoes in two-level systems of solids and gases are discussed with particular emphasis on backward-wave echoes. One example of the backward echoes was realized with the atomic sodium $D$ line. The detection of this echo requires neither optical shutters nor magnetic field. The decay rate of the echo due to Na-Ar collisions was measured. It is shown that the effect of velocity changing collisions is negligible compared with that of phase interrupting ones.

Physical Review Letters•Apr 9, 1979•62 citations

The Backward Photon Echoes in Na and Na2in the Nanosecond and Picosecond Regions

Masayuki Fujita, 修治 浅香, Hiroki Nakatsuka +1 more

Backward generation of echoes with three-pulse excitation is discussed in solid and gaseous systems. The backward echo in gases is possible as in solids but with different combinations of incident pulse directions. The first experiments in a gas were performed on the atomic sodium D 1 line in both the nanosecond and the picosecond region. Furthermore, we have observed the first backward echo in a molecular system, that is, in both of the X Σ -A Σ and X Σ -B I I transitions of Na 2 . Decays of the echoes were measured as a function of buffer gas (Ar) pressure, and collisional cross sections due to phase interrupting collisions were evaluated for each of the above cases.

Journal of the Physical Society of Japan•Aug 15, 1982•7 citations

Properties of photon echo formed by traveling and standing wave pulses

A. I. Alekseev, Askhat M Basharov

A theoretical study is made of the photon echo which appears in a rarefied gaseous medium as a result of successive action of traveling and standing wave pulses, polarized linearly at an angle ψ. This photon echo represents a superposition of two opposite traveling waves, one of which has the polarization of a standing wave pulse, the other has a linear polarization which depends on ψ and on the parameters of a resonant atomic transition. Similar polarization features are exhibited also by coherent radiation from a resonant medium subjected to steady-state fields of the traveling and standing waves separated by some distance in space. The possibility of obtaining a characteristic narrow resonance is discussed.

Soviet Journal of Quantum Electronics•Jan 31, 1981•0 citations

Photon Echoes in Gases

C. K. N. Patel, R. E. Slusher

Photon echoes following two pulses of C${\mathrm{O}}_{2}$ laser radiation incident on S${\mathrm{F}}_{6}$ gas have been observed. Homogeneous relaxation times for S${\mathrm{F}}_{6}$ colliding with S${\mathrm{F}}_{6}$, He, Ne, and ${\mathrm{H}}_{2}$ are shown to be easily measurable from the decay of photon-echo amplitude.

Physical Review Letters•May 13, 1968•201 citations
It has been found that a standing-wave pulse may be employed to produce an easily detectable, backward-propagating, phase-conjugate "replica" of any traditional gas-phase photon-echo signal. Standing-wave---induced backward two-pulse photon echoes have been observed in lithium vapor while only apertures were used to block laser background. An interesting dependence of backward echo intensity on standing-wave orientation is observed and discussed.
The possible three-pulse echoes in two-level systems of solids and gases are discussed with particular emphasis on backward-wave echoes. One example of the backward echoes was realized with the atomic sodium DDD line. The detection of this echo requires neither optical shutters nor magnetic field. The decay rate of the echo due to Na-Ar collisions was measured. It is shown that the effect of velocity changing collisions is negligible compared with that of phase interrupting ones.
Backward generation of echoes with three-pulse excitation is discussed in solid and gaseous systems. The backward echo in gases is possible as in solids but with different combinations of incident pulse directions. The first experiments in a gas were performed on the atomic sodium D 1 line in both the nanosecond and the picosecond region. Furthermore, we have observed the first backward echo in a molecular system, that is, in both of the X Σ -A Σ and X Σ -B I I transitions of Na 2 . Decays of the echoes were measured as a function of buffer gas (Ar) pressure, and collisional cross sections due to phase interrupting collisions were evaluated for each of the above cases.
A theoretical study is made of the photon echo which appears in a rarefied gaseous medium as a result of successive action of traveling and standing wave pulses, polarized linearly at an angle ψ. This photon echo represents a superposition of two opposite traveling waves, one of which has the polarization of a standing wave pulse, the other has a linear polarization which depends on ψ and on the parameters of a resonant atomic transition. Similar polarization features are exhibited also by coherent radiation from a resonant medium subjected to steady-state fields of the traveling and standing waves separated by some distance in space. The possibility of obtaining a characteristic narrow resonance is discussed.
Photon echoes following two pulses of CO2{\mathrm{O}}_{2}O2​ laser radiation incident on SF6{\mathrm{F}}_{6}F6​ gas have been observed. Homogeneous relaxation times for SF6{\mathrm{F}}_{6}F6​ colliding with SF6{\mathrm{F}}_{6}F6​, He, Ne, and H2{\mathrm{H}}_{2}H2​ are shown to be easily measurable from the decay of photon-echo amplitude.