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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Detecting Coriolis force via slow light

Sankar Davuluri, Yuri V. Rostovtsev

Published Mar 6, 2013• 1 citation
Publisher

Abstract

We consider a moving ultra-dispersive medium and demonstrate the enhanced Fizeau effect due to dragging the light. We have shown that the enhanced Fizeau effect on a single atom in a cavity can be observed. It has been shown that the change of phase is sensitive to the motion the speed of the order of 10 −15 cm/Hz 1/2 and for possible displacements as small as 10 −17 cm/Hz 1/2 . One of application can be the detection of weak forces exerted on a single atom. In particular, the Coriolis force as small as 10 −42 N/Hz 1/2 can be detected that would provide opportunity to detect rotation with sensitivity 10 −17 s −1 Hz −1/2 .

DOI
10.1117/12.2010294

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We consider a moving ultra-dispersive medium and demonstrate the enhanced Fizeau effect due to dragging the light. We have shown that the enhanced Fizeau effect on a single atom in a cavity can be observed. It has been shown that the change of phase is sensitive to the motion the speed of the order of 10 −15 cm/Hz 1/2 and for possible displacements as small as 10 −17 cm/Hz 1/2 . One of application can be the detection of weak forces exerted on a single atom. In particular, the Coriolis force as small as 10 −42 N/Hz 1/2 can be detected that would provide opportunity to detect rotation with sensitivity 10 −17 s −1 Hz −1/2 .
We have theoretically demonstrated an enhanced Fizeau effect due to dragging the light that occurs when the group velocity of light is ultraslow. The proposed experiment can be done in a cell of atomic Rb vapor under conditions such that the group velocity of light is of the order of a few hundred meters per second. We show theoretically that higher-order dispersion can influence the Fizeau effect and can be observed experimentally. It has been shown that the change of phase is sensitive to the motion of the cell with the speed of the order of ${10}^{\ensuremath{-}3}$ cm/s and for possible displacements as small as 10 \AA{}. The enhanced dragging effect can be applied for position control, detection of slow mechanical motion, and efficient modulators of light.
Fizeau experiment, inspiring Einstein's special theory of relativity, reveals a small dragging effect of light inside a moving medium. Dispersion can enhance such light drag according to Lorentz's predication. Here we experimentally demonstrate slow and fast light enhanced light drag in a moving optical microcavity through stimulated Brillouin scattering induced transparency and absorption. The strong dispersion provides an enhancement factor up to ~10^4, greatly reducing the system size down to the micrometer range. These results may offer a unique platform for a compact, integrated solution to motion sensing and ultrafast signal processing applications.
As one of the most influential experiments on the development of modern macroscopic theory from Newtonian mechanics to Einstein's special theory of relativity, the phenomenon of light dragging in a moving medium has been discussed and observed extensively in different types of systems. To have a significant dragging effect, the long duration of light travelling in the medium is preferred. Here we demonstrate a light-dragging experiment in an electromagnetically induced transparent cold atomic ensemble and enhance the dragging effect by at least three orders of magnitude compared with the previous experiments. With a large enhancement of the dragging effect, we realize an atom-based velocimeter that has a sensitivity two orders of magnitude higher than the velocity width of the atomic medium used. Such a demonstration could pave the way for motional sensing using the collective state of atoms in a room temperature vapour cell or solid state material.
The Fresnel-Fizeau effect of transverse drag, in which the trajectory of a light beam changes due to the transverse motion of the optical medium, is usually extremely small and hard to detect. We observe transverse drag in a moving hot-vapor cell, utilizing slow light due to electromagnetically induced transparency (EIT). The drag effect is enhanced by a factor 3.6 × 10 5 , corresponding to the ratio between the light speed in vacuum and the group velocity under EIT conditions. We study the contribution of the thermal atomic motion, which is much faster than the mean medium velocity, and identify the regime where its effect on the transverse drag is negligible.
Abstract Fizeau’s experiment, inspiring Einstein’s special theory of relativity, reveals a small dragging effect acting on light inside a moving medium. Dispersion can enhance such light drag according to Lorentz’s predication. Here fast- and slow-light-enhanced light drag is demonstrated experimentally in a moving optical microcavity through stimulated Brillouin scattering induced transparency and absorption. The strong dispersion provides an enhancement factor up to ~104, greatly reducing the system size down to the micrometer range. These results may offer a unique platform for a compact, integrated solution to motion sensing and ultrafast signal processing applications.
Abstract We address the coherent regulation of Fizeau's light dragging effect in a five-level atomic medium using the exploitation of joint strong control and weak probing fields. The strength of Fizeau's light dragging, as well as the phase velocity and group index, exhibit a strong reliance upon the detuning of the probing type field and the associated Rabi type frequencies of the control fields. The maximum coefficient for Fizeau's light dragging is determined to be ± 500. This phenomenon significantly affects the phase along with the group velocities and induces a phase shift in light pulses propagating through the medium. Besides, the phase shift with maximum strength of light pulse in the medium is found to be ± 0.08 radians. Finally, it is important to note that our findings hold practical implications for applications such as interferometry, imaging coding, and the development of cloaking devices.