Manipulating Electromagnetic Waves in Magnetized Plasmas: Compression, Frequency Shifting, and Release

Avitzour, Yoav; Shvets, Gennady

doi:10.1103/physrevlett.100.065006

Cited by 16 publications

(21 citation statements)

References 17 publications

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“…Most approaches to obtaining SL rely on the phenomenon of Electromagnetically Induced Transparency (EIT) [4]. EIT and its analogs have been demonstrated in several media, including cold [1], warm atomic gases [5], and even plasmas [6,7].More recently, in response to the emerging applications such as bio-sensing, an increasing attention has shifted towards obtaining EIT using electromagnetic metamaterials [8][9][10]. Metamaterials enable engineering electromagnetic resonances with almost arbitrary frequencies and spatial symmetries.…”

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confidence: 99%

Broadband Slow Light Metamaterial Based on a Double-Continuum Fano Resonance

2011

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We propose a concept of a low-symmetry three-dimensional metamaterial exhibiting a double-continuum Fano (DCF) optical resonance. Such metamaterial is described as a birefringent medium supporting a discrete dark electromagnetic state weakly coupled to the continua of two nondegenerate bright bands of orthogonal polarizations. It is demonstrated that light propagation through such DCF metamaterial can be slowed down over a broad frequency range when the medium parameters (e.g., frequency of the dark mode) are adiabatically changed along the optical path. Using a specific metamaterial implementation, we demonstrate that the DCF approach to slow light is superior to that of the electromagnetically induced transparency because it enables spectrally uniform group velocity and transmission coefficient.

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confidence: 99%

Broadband Slow Light Metamaterial Based on a Double-Continuum Fano Resonance

2011

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“…Moreover, the observed interference phenomena depend sensitively on plasma properties and carrier interactions, and thus, can be used to study solid-state plasmas over a vast range of external fields and temperatures from the classical limit to the ultra-quantum limit. This experimental finding may open up further new opportunities for using coherent methods to manipulate terahertz waves 13,14,19 as well as to probe more exotic phenomena in condensed-matter systems that occur owing to many-body interactions and disorder.…”

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confidence: 90%

Interference-induced terahertz transparency in a semiconductor magneto-plasma

et al. 2009

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Maximum modulation of light transmission occurs when an opaque medium is suddenly made transparent. This phenomenon occurs in atomic and molecular gases through different mechanisms 1,2 , whereas much room remains for further studies in solids [3][4][5] . A plasma is an illustrative system showing opacity for low-frequency light, and light-plasma interaction theory provides a universal framework to describe diverse phenomena including radiation in space plasmas . Here, we use coherent terahertz magneto-spectroscopy to reveal a thermally and magnetically induced transparency in a semiconductor plasma. A sudden appearance and disappearance of transmission through electron-doped InSb is observed over narrow temperature and magnetic field ranges, owing to coherent interference between left-and right-circularly polarized terahertz eigenmodes. Excellent agreement with theory reveals long-lived coherence of magneto-plasmons and demonstrates the importance of coherent interference in the terahertz regime.The free electrons in the conduction band of doped narrow-gap semiconductors, for example, InSb, InAs and HgCdTe, behave as classic solid-state plasmas and have been examined through a number of infrared spectroscopy studies 10,11 . Owing to the low electron densities achievable in these materials and to the electrons' small effective mass and high mobility, most of the important energy scales (the cyclotron energyhω c , the plasma energyhω p , the Fermi energy E F , intra-donor transition energies and so on) can all lie within the same narrow energy range from ∼1 to 10 meV, or the terahertz frequency range (1 THz is equivalent to 4.1 meV). The interplay between these material properties, which are tunable with magnetic field, doping density and/or temperature, make doped narrow-gap semiconductors a useful material system in which to probe and explore new phenomena that can be exploited for future terahertz technology [12][13][14] . Here, we have used a time-domain terahertz magnetospectroscopy system 15 (see the Methods section) with a linearly polarized, coherent terahertz beam to investigate magnetoplasmonic effects in a lightly n-doped InSb sample that shows a sharp plasma edge at ∼0.3 THz at zero magnetic field as well as sharp absorption and dispersion features around the cyclotron resonance (ω c /2π ∼ 2 THz T −1 ). These spectral features can be sensitively controlled by changing the magnetic field and temperature, owing to the very small effective masses of electrons and low thermal excitation energy in this narrow-gap semiconductor. Furthermore, long decoherence times (up to 40 ps) of electron cyclotron oscillations give rise to sharp interference fringes and coherent beating between different normal modes (coupled photon-magneto-plasmon excitations) of the semiconductor plasma, which can be revealed by polarizationsensitive measurements.We found that the transmission of terahertz radiation through this plasma sensitively changes with the temperature, magnetic field and frequency. As an example, we show the tem...

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“…Nonlinear compression of Gaussian pulses in the atmosphere was studied by Yedierler [31]. It was demonstrated numerically that high power microwave pulses can be compressed inside a magnetized plasma by changing the magnitude or the direction of the magnetic field [32]. Tsung et al proposed a method based on the frequency downshift (or photon deceleration) in underdense plasmas to generate single-cycle ultra-intense laser pulses [33].…”

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confidence: 99%

Spatiotemporal Evolution of Intense Short Gaussian Laser Pulses in Weakly Relativistic Magnetized Plasma

Olumi

Maraghechi

2016

Contrib. Plasma Phys.

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Key words High-intensity lasers, ultra-short pulses, relativistic nonlinearity, self-focusing in plasma, selfcompression in plasma.The weakly relativistic regime of propagation of a short and intense laser pulse in the magnetized plasma is investigated. By considering relativistic nonlinearity and using non-linear Schrödinger equation with paraxial approximation, two second-order coupled differential equations are obtained for the longitudinal pulse width parameter (in time) and for the transverse pulse width parameter (in space). The simultaneous evolution of spot size and length of a relativistic Gaussian laser pulse in a magnetized plasma can be calculated by the numerical solution of the equations. The effect of magnetic field is investigated. It is observed that in the presence of magnetic field both the self-compression and the self-focusing can be enhanced. Furthermore, the interplay between the longitudinal self-compression and the transverse self-focusing in a magnetized plasma is investigated.

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Manipulating Electromagnetic Waves in Magnetized Plasmas: Compression, Frequency Shifting, and Release

Cited by 16 publications

References 17 publications

Broadband Slow Light Metamaterial Based on a Double-Continuum Fano Resonance

Broadband Slow Light Metamaterial Based on a Double-Continuum Fano Resonance

Interference-induced terahertz transparency in a semiconductor magneto-plasma

Spatiotemporal Evolution of Intense Short Gaussian Laser Pulses in Weakly Relativistic Magnetized Plasma

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