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

Acta Physica Sinica

Ultraslow light propagation in a solid

Fan Bao-Hua, Zhang Yun-Dong, Yuan Ping, 哈尔滨工业大学光电子技术研究所309信箱,哈尔滨 150001

Published Jan 1, 2005• 7 citations
Publisher

Abstract

With the spectral hole-burning effect resulting from coherent population oscillation in the homogenously broadened material， the ultraslow light propagation phenomenon with the group velocity as slow as 27.55±0.05m/s at room temperature in a ruby crystal is observed. And the group velocity in ruby crystal depends on the amplitude modulation frequency, the power of laser beam and the orientation of the crystal lattice. Lower frequency or higher power leads to slower group velocity.

DOI
10.7498/aps.54.4692

Related papers

Observation of Ultraslow Light Propagation in a Ruby Crystal at Room Temperature

Matthew S. Bigelow, Nick N. Lepeshkin, Robert W. Boyd

We have observed slow light propagation with a group velocity as low as 57.5+/-0.5 m/s at room temperature in a ruby crystal. A quantum coherence effect, coherent population oscillations, produces a very narrow spectral "hole" in the homogeneously broadened absorption profile of ruby. The resulting rapid spectral variation of the refractive index leads to a large value of the group index. We observe slow light propagation both for Gaussian-shaped light pulses and for amplitude modulated optical beams in a system that is much simpler than those previously used for generating slow light.

Physical Review Letters•Mar 21, 2003•694 citations

Observation of ultraslow light propagation in a ruby crystal at room temperature

Bao-Hua Fan, Yundong Zhang, Ping Yuan

We have observed slow light propagation with a group velocity as slow as 27.52±0.05m/s in a ruby crystal at room temperature. The Gaussian-like pulse signal, which was gained by modulating beam at 514.5nm, was injected into a ruby crystal. The spectral hole effect, attributed to high laser power density, leads to the induced refractive index steep rising. According as this rising, the group velocity of pulse propagation in the ruby becomes very slowly. The experiment result shows that the velocity of pulse propagation depends on the modulation frequency, laser power, the position of crystal and the profile of signal waveform. At the same condition the Gaussian-like pulse obtains much slower velocity than sinusoidal signal.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jan 28, 2005•3 citations

Reduction of Light Group Velocity by Coherent Population Oscillation in a Ruby Crystal

Zhang Yun-Dong, Bao-Hua Fan, Ping Yuan +1 more

We report the investigation of the reduction of the group velocity propagation resulting from the steep change of the refractive index by the coherent population oscillation in a ruby crystal at room temperature. Slow light propagation is observed in a solid-state material at room temperature. The measured delay is about 2.314±0.005 ms, corresponding to a group velocity as slow as 43.215±0.094 m/s in a non-sinusoid modulated waveform. The influences of pulse duration on the delay and the reduction of light propagation are given.

Chinese Physics Letters•Jan 1, 2004•13 citations

Slowdown the light speed in an alexandrite crystal

Bao-Hua Fan, Yundong Zhang, Ping Yuan

We have observed a hole in the absorption profile of the homogeneously broadened absorption band of an Alexandrite crystal. With the spectral hole-burning technique that resulting from the periodic modulation of the ground state population at the beat frequency between the pump and the probe fields, we observed the slowdown the light propagation with the group velocity as slow as 12.5 m/s at room temperature. And the group velocity in the Alexandrite crystal depends on the amplitude modulation frequency, the power of laser beam and the orientation of the crystal lattice. The lower frequency or higher power leads to slower group velocity of light.

Chinese Optics Letters•Aug 28, 2005•0 citations

Experimental observation of the reduction of light group velocity by spectral burning hole in a ruby crystal

Yundong Zhang, Ping Yuan, Bao-Hua Fan +1 more

Slow light propagation is observed in solid state material at room temperature. Here we report the investigation of the slowdown of light propagation resulting from steep change of refractive index by spectral hole technique in a ruby crystal at room temperature. Measured delay is about 3.452/spl plusmn/0.005 ms, corresponding to a group velocity as slow as 28.969/spl plusmn/0.042 m/s in a nonsinusoid modulated waveform.

•Jul 8, 2004•0 citations

Ultraslow light propagation in solid media

Fan Bao

The basic theories underlying the reduction of the group velocity of light are introduced and methods for achieving ultraslow light propagation are discussed. The phenomenon of spectral hole-burning in homogeneously broadened media and the experimental slowing of light in ruby are described. We discuss the significance of such research for science and applications.

•Jan 1, 2005•0 citations
With the spectral hole-burning effect resulting from coherent population oscillation in the homogenously broadened material， the ultraslow light propagation phenomenon with the group velocity as slow as 27.55±0.05m/s at room temperature in a ruby crystal is observed. And the group velocity in ruby crystal depends on the amplitude modulation frequency, the power of laser beam and the orientation of the crystal lattice. Lower frequency or higher power leads to slower group velocity.
We have observed slow light propagation with a group velocity as low as 57.5+/-0.5 m/s at room temperature in a ruby crystal. A quantum coherence effect, coherent population oscillations, produces a very narrow spectral "hole" in the homogeneously broadened absorption profile of ruby. The resulting rapid spectral variation of the refractive index leads to a large value of the group index. We observe slow light propagation both for Gaussian-shaped light pulses and for amplitude modulated optical beams in a system that is much simpler than those previously used for generating slow light.
We have observed slow light propagation with a group velocity as slow as 27.52±0.05m/s in a ruby crystal at room temperature. The Gaussian-like pulse signal, which was gained by modulating beam at 514.5nm, was injected into a ruby crystal. The spectral hole effect, attributed to high laser power density, leads to the induced refractive index steep rising. According as this rising, the group velocity of pulse propagation in the ruby becomes very slowly. The experiment result shows that the velocity of pulse propagation depends on the modulation frequency, laser power, the position of crystal and the profile of signal waveform. At the same condition the Gaussian-like pulse obtains much slower velocity than sinusoidal signal.
We report the investigation of the reduction of the group velocity propagation resulting from the steep change of the refractive index by the coherent population oscillation in a ruby crystal at room temperature. Slow light propagation is observed in a solid-state material at room temperature. The measured delay is about 2.314±0.005 ms, corresponding to a group velocity as slow as 43.215±0.094 m/s in a non-sinusoid modulated waveform. The influences of pulse duration on the delay and the reduction of light propagation are given.
We have observed a hole in the absorption profile of the homogeneously broadened absorption band of an Alexandrite crystal. With the spectral hole-burning technique that resulting from the periodic modulation of the ground state population at the beat frequency between the pump and the probe fields, we observed the slowdown the light propagation with the group velocity as slow as 12.5 m/s at room temperature. And the group velocity in the Alexandrite crystal depends on the amplitude modulation frequency, the power of laser beam and the orientation of the crystal lattice. The lower frequency or higher power leads to slower group velocity of light.