arXiv:quant-ph/0205158 · Physical Review A

Steep optical-wave group-velocity reduction and “storage” of light without on-resonance electromagnetically induced transparency

Mikio Kozuma, Daisuke Akamatsu, L. Deng, E. W. Hagley, Marvin G. Payne

Published Sep 11, 2002• 42 citations

Abstract

We report on experimental investigation of optical-pulse group-velocity reduction and probe-pulse ``regeneration'' using a Raman scheme. This scheme, which does not rely on the commonly used on-one-photon-resonance electromagnetically induced transparency (EIT) process, has many advantages over the conventional method that critically relies on the transparency window created by an EIT process. We demonstrate significant reduction of the group velocity, less probe-field loss, reduced probe-pulse distortion, and high probe-pulse regeneration efficiency.

DOI: 10.1103/physreva.66.031801

Related papers

Achieving very-low-loss group velocity reduction without electromagnetically induced transparency

L. Deng, E. W. Hagley, Mikio Kozuma +2 more

A Raman method is studied experimentally for potential optical-wave group velocity reduction in resonant medium. Specifically, we show that the proposed method can achieve significant group velocity reduction comparable to the conventional electromagnetically induced transparency (EIT) method that had been exclusively used to date. In addition, we show that this method has a significantly lower loss compared to the EIT method, and has rich dynamics such as probe pulse narrowing. Such features have applications in the domain of telecommunication technology.

Applied Physics LettersAug 12, 200213 citations

Optical-wave group-velocity reduction without electromagnetically induced transparency

L. Deng, E. W. Hagley, Mikio Kozuma +1 more

A Raman scheme for optical-pulse group-velocity reduction in a pure lifetime broadened system is studied. We show that this nonelectromagnetically induced transparency (NEIT) scheme has many advantages over the conventional method that critically relies on the transparency window created by an EIT process. Significant reduction of the group velocity, probe field loss, and pulse distortion are reported. In addition, rich dynamics of the propagation process are studied.

Physical Review AMay 10, 200239 citations

Significant propagation reduction of an optical pulse in an active Raman gain scheme

Kaijun Jiang, L. Deng, M. G. Payne

We investigate an active Raman gain scheme for significant group velocity reduction. This scheme, which is fundamentally different from the electromagnetically induced transparency scheme, is capable of achieving ultraslow and distortion-free propagation of a pulsed probe field. The group velocity behavior is drastically different from the conventional electromagnetically induced transparency scheme, and the new scheme can be used to accurately determine the decoherence rate of a long-lived state. In addition, the Raman gain scheme has the advantage of being broadly tunable, an important feature that may have potential applications.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEFeb 8, 20070 citations

Ultraslow propagation of an optical pulse in a three-state active Raman gain medium

Kaijun Jiang, L. Deng, M. G. Payne

We investigate an active Raman gain scheme for significant group velocity reduction. We show that this scheme, which is fundamentally different from the electromagnetically induced transparency scheme, is capable of achieving ultraslow and distortion-free propagation of a pulsed probe field. We demonstrate the group velocity behavior that is drastically different from the conventional electromagnetically induced transparency scheme, and we show that the new scheme can be used to accurately determine the decoherence rate of a long-lived state. In addition, the Raman gain scheme has the advantage of being broadly tunable, an important feature that may have potential applications.

Physical Review AOct 9, 200641 citations

Extremely slow propagation of a light pulse in an ultracold atomic vapor: A Raman scheme without electromagnetically induced transparency

M. G. Payne, L. Deng

We describe a Raman scheme where the group velocity of an optical pulse can be altered dramatically. With this none electromagnetically-induced-transparency scheme, we show that when on a two-photon resonance, a light pulse can propagate with extremely slow group velocity. Both pulse narrowing and broadening can occur depending upon the choice of two-photon detuning. When using a tuned far-off two-photon resonance, we show that the pulse propagates ``superluminally'' in the medium with pulse narrowing.

Physical Review AAug 14, 200150 citations

EFFECTS OF MODULATION SCHEMES ON OPTICAL PULSES TRANSITING AN ELECTROMAGNETICALLY INDUCED TRANSPARENT MEDIUM

Wachter, Christian F.

This thesis investigates the result of modulation schemes in electromagnetically induced transparency (EIT) in rubidium vapor. Through the process of EIT, a control beam can be used to change the optical properties of a medium experienced by a probe field, generating a transparency window. The corresponding change in index of refraction results in slowed group velocity while the beam propagates through the medium. Modulation is used to transmit a message signal through a medium. In classical systems, this entails converting data into a radio frequency by adding a message to an electronic or optical carrier signal. The properties of EIT, light-slowing, and their impacts on a probe pulse with modulation will be confirmed through a detailed semi-classical analysis and by experimental observation.

Sep 1, 20230 citations