Circularly polarized narrowband terahertz radiation from a eulytite oxide by a pair of femtosecond laser pulses

Takeda, R.; Kida, N.; Sotome, M.; Matsui, Yoshiki; Okamoto, Hiroshi

doi:10.1103/physreva.89.033832

Cited by 19 publications

(11 citation statements)

References 42 publications

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“…(13) is satisfied. Indeed, the temporal oscillation component in the terahertz wave has been observed near the phonon-polariton resonance in ZnTe [40] and the F 2 phonon mode in Bi 4 Ge 3 O 12 [41]. In α-TeO 2 , the calculated generation efficiency of the terahertz radiation shows the peak structure at 3.71 THz [ Fig.…”

Section: Peak Structure At 371 Thz In Power Spectrummentioning

confidence: 99%

Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

et al. 2014

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We report on the observation of terahertz radiation in a non-centrosymmetric insulating oxide, paratellurite (α-TeO2) by irradiation of a femtosecond laser pulse at room temperature. In the power spectrum of the terahertz radiation, an intensity fringe pattern with a period of ∼ 0.25 THz shows up below 3 THz. It can be reproduced by taking into account the effective generation length for the terahertz radiation with a poor phase-matching condition. In addition, a temporal oscillation component appears in the radiated terahertz wave with a frequency of ∼ 3.71 THz, which is in good agreement with the center frequency of the Raman active longitudinal optical (LO) E mode. On the basis of comprehensive polarized optical and Raman spectroscopic studies, we explain the generation mechanism of the temporal oscillation component in terms of the coherent phonon generation via impulsive stimulated Raman scattering.

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Section: Peak Structure At 371 Thz In Power Spectrummentioning

confidence: 99%

Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

et al. 2014

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“…Such observations can be extended, of course, to other rotor and nuclear-spin states. The important point here is that the energy shifts due to the light exhibit different dependencies upon B XX , B Y Y , and B ZZ for different rotor states while differing for opposite circular polarizations: the rotation and hence orientation of the molecule relative to the light differs for different rotor states while one enantiomorphic form of the helically twisting electric and magnetic field vectors that comprise circularly polarized light [57] is more competent at driving chiral oscillations in the charge and current distributions of the molecule than the other, much as one enantiomorphic form of a glove is a better fit for a human hand than the other, similarly for a fixed circular polarization and opposite enantiomers. In contrast, the chirally sensitive phase that underpins chiral microwave three-wave mixing derives from the sign of the product of three orthogonal electric dipole moment components, which is opposite for opposite enantiomers [23][24][25][26][27][28][29][30][31][32].…”

Section: B Evoking a Chiroptical Response From The Samplementioning

confidence: 99%

Chiral Rotational Spectroscopy

Cameron¹,

Götte²,

Barnett³

2018

Chiral Analysis

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We introduce chiral rotational spectroscopy, a technique that enables the determination of the orientated optical activity pseudotensor components B XX , B Y Y , and B ZZ of chiral molecules, in a manner that reveals the enantiomeric constitution of a sample and provides an incisive signal even for a racemate. Chiral rotational spectroscopy could find particular use in the analysis of molecules that are chiral solely by virtue of their isotopic constitution and molecules with multiple chiral centers. A basic design for a chiral rotational spectrometer together with a model of its functionality is given. Our proposed technique offers the more familiar polarizability components α XX , α Y Y , and α ZZ as by-products, which could see it find use even for achiral molecules.

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“…Again, analogous observations can be made for the magnetic field lines. Interestingly, there is a sense in which the chirality [57] of the helical field lines in our electromagnetic tangle is opposite to that of the plane waves that comprise the tangle: for 1 s =  the field lines form right-or left-handed helices, as described above, whereas for each wave the tips of the field vectors trace out left-or right-handed cylindrical helices about the direction of propagation [59]. It should be noted, however, that the field lines of a circularly polarised plane wave are, like those of a linearly polarised plane wave (section 2), straight lines of indefinite extent.…”

Section: Electromagnetic Tanglementioning

confidence: 99%

Monochromatic knots and other unusual electromagnetic disturbances: light localised in 3D

Cameron

2018

J. Phys. Commun.

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We introduce and examine a collection of unusual electromagnetic disturbances. Each of these is an exact, monochromatic solution of Maxwell's equations in free space with looped electric and magnetic field lines of finite extent and a localised appearance in all three spatial dimensions. Included are the first explicit examples of monochromatic electromagnetic knots. We also consider the generation of our unusual electromagnetic disturbances in the laboratory, at both low and high frequencies, and highlight possible directions for future research, including the use of unusual electromagnetic disturbances as the basis of a new form of three-dimensional display.

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Circularly polarized narrowband terahertz radiation from a eulytite oxide by a pair of femtosecond laser pulses

Cited by 19 publications

References 42 publications

Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

Chiral Rotational Spectroscopy

Monochromatic knots and other unusual electromagnetic disturbances: light localised in 3D

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