arXiv:cond-mat/0507512

The optical phenomena in multiple-photon interactions (I)

Xiang-Yao Wu, Pi-Feng Gong, Zhi-Yong Yi, Changrui Wu, Xiaoyan Gu, Zonghua Shi

Published Jul 22, 2005• 0 citations

Abstract

In the recent experiment, the phenomena of superluminal and slow-light propagation in dispersive medium were found, and there are various explanation in theory. We find the phenomenon can be explained by multiple-photon interaction. Otherwise, the multiple-photon interaction can also appear other optical phenomenon: doubling frequency, sum frequency, difference frequency which are found in nonlinear optics.

DOI: 10.48550/arxiv.cond-mat/0507512

Related papers

Optical phenomena in the time domain

Charles S. Adams, Ifan G. Hughes

Abstract This chapter discusses a sum of many waves with different frequencies, resulting in wave forms with particular time dependence. The propagation of the time-dependent wave solution through free space, or media with a particular dispersion relation, are analysed. Interesting cases such as the effect of group velocity dispersion, slow light, and fast light are highlighted.

Dec 13, 20180 citations

Explanation of Superluminal Phenomena Based on Wave-Particle Duality and Proposed Optical Experiments

Hai-Long Zhao

An explanation for superluminal phenomena based on wave-particle duality of photons is suggested. A single photon may be regarded as a wave packet, whose spatial extension is its coherence volume. As a photon propagates as a wave train in vacuum, its velocity is just the speed of light. When it tunnels through a barrier as a particle, its wave function collapses and it will travel faster than light. Superluminal motion can occur only within the coherence length and the time constrained by uncertainty principle. A massive particle cannot be superluminal during the tunneling process. So superluminality does not violate causality. As for the superluminal and negative group velocities in anomalously dispersive medium, they are merely reshaping effect of the pulse, and they will become subluminal at large distances. A couple of experiments are proposed to test the superluminal phenomena.

arXiv:1405.3364May 14, 20140 citations

Bandwidth Limitation in Slow Light Schemes

Jacob B. Khurgin, R.S. Tucker

Transparency (EIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305 15.7 Coupled Photonic Resonator Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309 15.8 Dispersion Limitation of Nonlinear Photonic SL Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315 15.9 Conclusions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318 Recent years have seen a great increase in interest in the regime of light propagation with reduced group velocity, commonly referred to as slow light (SL). Startingwith the pioneeringwork performed in the late 1990s [1] a great effort had been directed at both understanding the basic physics of SL phenomena and applying it to various practical tasks-optical communications, signal processing, photonic switching, and many others.

CRC Press eBooksOct 8, 20180 citations

Dispersion-dependent superluminal propagation and photon drag in GaAs/AlGaAs quantum dot molecule

Azmat Iqbal Bashir, Syeda Uzma Batool, Ayesha Arif +1 more

Abstract Controlling the basic properties of light such as polarization, angular momentum, and speed through various optical media leads to interesting phenomena in various fields such as quantum optics, photonics, plasmonics, and quantum information technology. Few of the phenomenon include, for instance, light storage, ultra-slow and ultra-fast propagation, optical transparency, and quantum entanglement via quantum coherence or superposition. The understanding of these phenomenon of milestone implications paved the way for the invention of novel classical and quantum technology. In this article, we present detailed theoretical and numerical demonstration on the dispersion-dependent phenomenon of slow and fast light, optically induced transparency, and photon drag. For this, we employ a three-level scheme of an ensemble of GaAs\AlGaAs double quantum dot molecule in cascade configuration. In particular, by tuning the medium dispersion we predict interesting interplay between ultra-slow and ultra-fast light propagation with vanishing, infinite, ultra-positive and ultra-negative group velocities, and optical-assisted quantum transparency. The quantum coherence of the dressed states modifies considerably the optical properties of the system in view of dispersion, absorption, electron energy loss, transmission, and photon drag. An interesting interplay between ultra-slow to ultra-fast propagation is found by tuning various optical parameters. The calculated superluminal value of group velocity is ± 6 × 1 0 11 m s −1 . We also predict light propagation at vanishing and infinite group velocity. The calculated light drag is ± 6 × 10 − 6 rad/m.

Physica ScriptaOct 2, 202321 citations

Fast and Slow Light

Guang S. He

Fast or slow light propagation means that the group velocity of a quasi-monochromatic light pulse propagating in a resonant medium can be significantly faster or slower than the light speed in a vacuum. Since the end of the last century and the beginning of this century, studies on this subject have attracted a great deal of interest. Remarkable progress has been achieved, based on various nonlinear optical interactions in resonant media. The fundamental research on this subject can enrich our understanding of special relativity and causality in physics. On the other hand, those mechanisms and techniques developed for fast and slow light propagation have provided the potential for many future applications, such as optical buffers and variable delay lines for optical networks, optical computing, optical telecommunications, optical data storage, and signal processing.

Oxford University Press eBooksOct 30, 20140 citations

Symmetry Violation of Time Reversal in High Order Nonlinear Stimulated Radiation and Absorption Processes of Light

Mei Xiaochun

The stimulated radiation and absorption theory of light based on low order linear interaction is considered symmetrical in time reversal processes at present. It is provided in the paper that after high order nonlinear interaction between radiation fields and charged particles is considered, time reversal symmetry in the stimulated radiation and absorption processes would be violated. Based on revised theory, the non-equilibrium and nonlinear phenomena just as generation of laser, amplification of non-population inversion, self-induced transparency and self-induced absorption can be explained more rationally. Other nonlinear processes light such as multiple frequency, sum frequency and difference frequency, double stationary state, self-focusing and self-defocusing, double and multi-photon absorption, stimulated Raman and Brillouim scatterings, photon echo and so on are also enumerated and analyzed in the paper. The results show that most processes of nonlinear optics are violated time reversal symmetry obviously.

Aug 9, 20030 citations