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

arXiv:1103.0104

Observations of photon echo enhancement in an ultraslow light regime

Joonsung Hahn, Byoung Seung HAM

Published Mar 1, 2011• 0 citations
arXivHTMLPDF

Abstract

Using spectral hole-burning-based ultraslow group velocity in a dilute solid medium, we report enhanced photon echo efficiency three orders of magnitude higher than that in a nonslow light regime. The enhancement is due to exponentially increased absorption of an optical data pulse owing to the enhanced photon-atom interaction in an ultraslow light regime, whereas echo reabsorption is negligibly small due to group-velocity dependent population depletion.

DOI
10.48550/arxiv.1103.0104

Related papers

Enhanced Echo Retrieval Efficiency Using Ultraslow Light

Joonsung Hahn, Byoung Seung HAM

Using ultraslow light phenomenon, we report two-orders of magnitude enhanced photon echo efficiency in a rare-earth doped solid medium, where the enhancement is due to lengthened photon-atom interaction time in a dilute optical medium.

Advanced Photonics•Jan 1, 2011•0 citations

Coherent Photon Echo Gain in a Slow Light Regime

Joonsung Hahn, Byoung Seung HAM

In a spectral hole-burning-based ultraslow-light regime, a few hundred times enhanced photon echoes are observed, where the slow light plays a role to break the critical constraint of ultralow echo efficiency in conventional photon echoes.

Nonlinear Optics•Jan 1, 2011•0 citations

Slow light enhanced photon echoes

Joonsung Hahn, Byoung Seung HAM

We report a slow light-enhanced photon echo method, whose retrieval efficiency is two orders of magnitude higher than that of conventional photon echoes. The enhanced photon echo efficiency is due to lengthened interaction time given by ultraslow group velocity.

arXiv:0909.4992•Sep 28, 2009•2 citations

Transmission enhancement of ultraslow light in an atom shelved model of spectral hole burning solids

Byoung Seung HAM, Joonsung Hahn

We present transmission enhancement of ultraslow light in an inhomogeneously broadened spectral hole-burning solid medium by using precedent dummy light. The function of the dummy light is to burn a half-depth narrow spectral hole in an optically shelved solid system and to maintain the system optically transparent to the probe light, where the probe must experiences ultraslow group velocity due to the narrow spectral hole. The observed transmission increase is as high as 7 times compared with self-induced ultraslow light [J. Hahn and B. S. Ham, Opt. Express 16, 16723 (2008)], where the transmission enhancement is equivalent to 10(5) amplification considering an optical depth of d = 10.

Optics Express•May 20, 2009•4 citations

Observations of self-induced ultraslow light in a persistent spectral hole burning medium

Joonsung Hahn, Byoung Seung HAM

We present observations of self induced ultraslow light in a persistent spectral hole-burning rare-earth doped crystal. The observed group delay (velocity) is as long as 40 micros (75 m/s), which is comparable to that obtained using electromagnetically induced transparency or coherent population oscillations. We analyze the observed ultraslow light as a function of frequency detuning, light intensity, and atom population (oscillator strength). The present observation of ultraslow light in a persistent spectral hole-burning medium gives potentials to all-optical information processing such as on-demand all-optical buffer memories.

Optics Express•Oct 6, 2008•21 citations

First observation of ultraslow group velocity of light in a solid

Alexey V. Turukhin, Venkatapura S. Sudarshanam, M. S. Shahriar +2 more

Summary form only given. Electromagnetically induced transparency (EIT) has been the subject of many experimental and theoretical studies over recent years. Most recently, substantial experimental and theoretical work in this area has been focused on the use of EIT to give ultraslow group velocities for light in both ultracold atomic gas and hot atomic vapors. Much of this interest is based on the fact that slowing the group velocity of a laser pulse down to the speed of sound in the same material can produce strong coupling between acoustic waves and the electromagnetic field. It has been suggested that a giant nonlinearity obtained by this method might be utilized for efficient multi-wave mixing and quantum nondemolition measurements. Slow light might also allow a very efficient nonlinear interaction between laser pulses of extremely low (down to a single photon) energies. Here, we report the first direct observation of an ultraslow group velocity of light down to 45 m/s in a solid, well below the speed of sound in the medium. This group velocity is fundamentally limited only by the inhomogeneous broadening of the ground state transition. At low coupling beam intensities, the fraction of centers that are pumped into the "dark state" increases with coupling laser power, so that the observed group delay is increasing with coupling beam intensity. At higher intensities, power broadening reduces the sharpness of the dispersive feature and the observed group delay decreases.

Quantum Electronics and Laser Science Conference•Nov 13, 2002•8 citations
Using spectral hole-burning-based ultraslow group velocity in a dilute solid medium, we report enhanced photon echo efficiency three orders of magnitude higher than that in a nonslow light regime. The enhancement is due to exponentially increased absorption of an optical data pulse owing to the enhanced photon-atom interaction in an ultraslow light regime, whereas echo reabsorption is negligibly small due to group-velocity dependent population depletion.
We present transmission enhancement of ultraslow light in an inhomogeneously broadened spectral hole-burning solid medium by using precedent dummy light. The function of the dummy light is to burn a half-depth narrow spectral hole in an optically shelved solid system and to maintain the system optically transparent to the probe light, where the probe must experiences ultraslow group velocity due to the narrow spectral hole. The observed transmission increase is as high as 7 times compared with self-induced ultraslow light [J. Hahn and B. S. Ham, Opt. Express 16, 16723 (2008)], where the transmission enhancement is equivalent to 10(5) amplification considering an optical depth of d = 10.
We present observations of self induced ultraslow light in a persistent spectral hole-burning rare-earth doped crystal. The observed group delay (velocity) is as long as 40 micros (75 m/s), which is comparable to that obtained using electromagnetically induced transparency or coherent population oscillations. We analyze the observed ultraslow light as a function of frequency detuning, light intensity, and atom population (oscillator strength). The present observation of ultraslow light in a persistent spectral hole-burning medium gives potentials to all-optical information processing such as on-demand all-optical buffer memories.
Summary form only given. Electromagnetically induced transparency (EIT) has been the subject of many experimental and theoretical studies over recent years. Most recently, substantial experimental and theoretical work in this area has been focused on the use of EIT to give ultraslow group velocities for light in both ultracold atomic gas and hot atomic vapors. Much of this interest is based on the fact that slowing the group velocity of a laser pulse down to the speed of sound in the same material can produce strong coupling between acoustic waves and the electromagnetic field. It has been suggested that a giant nonlinearity obtained by this method might be utilized for efficient multi-wave mixing and quantum nondemolition measurements. Slow light might also allow a very efficient nonlinear interaction between laser pulses of extremely low (down to a single photon) energies. Here, we report the first direct observation of an ultraslow group velocity of light down to 45 m/s in a solid, well below the speed of sound in the medium. This group velocity is fundamentally limited only by the inhomogeneous broadening of the ground state transition. At low coupling beam intensities, the fraction of centers that are pumped into the "dark state" increases with coupling laser power, so that the observed group delay is increasing with coupling beam intensity. At higher intensities, power broadening reduces the sharpness of the dispersive feature and the observed group delay decreases.