Molecular Orientation and Alignment by Intense Single-Cycle THz Pulses

Fleischer, Sharly; Zhou, Yan; Field, Robert W.; Nelson, Keith A.

doi:10.1103/physrevlett.107.163603

Cited by 306 publications

(261 citation statements)

References 49 publications

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“…A complete analytical derivation of this result is given in this paper. Note that this dependency has been already mentioned in [54]. The relation between the FID and the degree of orientation allows us to quantitatively compare the experimental observations with the numerical simulations.…”

Section: Introductionmentioning

confidence: 89%

“…Note that a larger degree of orientation can be achieved with the two-color mechanisms through ionization depletion [53]. In this second regime, molecular orientation has been recently addressed experimentally for linear molecules using only a THz field [54] or its combination with a laser field [55], and in [56,57] for an excitation process with two-color laser fields.…”

Section: Introductionmentioning

confidence: 99%

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Observation of the field-free orientation of a symmetric-top molecule by terahertz laser pulses at high temperature

et al. 2016

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We investigate experimentally and numerically the field-free orientation of the symmetric top molecule of methyl-iodide at high temperature using a terahertz radiation generated by a plasma induced by a two-color laser beam. The degree of orientation is measured from the free-induction decay emitted by the sample. The observed experimental signal is reproduced with a good accuracy by numerical simulations.

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Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Observation of the field-free orientation of a symmetric-top molecule by terahertz laser pulses at high temperature

et al. 2016

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“…In the latter mechanism, so-called sequential double ionization (SDI), two electrons are released independently step by step, therefore the SDI yield can be simulated by using ionization theory based on SAE. Nevertheless, recent experiments [7][8][9] have doubted the validity of independent-electron approximation in the SDI regime. Specifically, Fleischer et al [9] reported an angular correlation between the first and second ionization steps.…”

mentioning

confidence: 99%

“…Nevertheless, recent experiments [7][8][9] have doubted the validity of independent-electron approximation in the SDI regime. Specifically, Fleischer et al [9] reported an angular correlation between the first and second ionization steps. In Ref.…”

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confidence: 99%

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Revealing the role of electron correlation in sequential double ionization

et al. 2014

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The experimental observations of sequential double ionization (SDI) of Ar [A. N. Pfeiffer et al., Nature Phys. 7, 428 (2011)], such as the four-peak momentum distribution and the ionization time of the first and second electrons, are investigated and reproduced with a quantum model by including and excluding the e-e correlation effect. Based on the comparison of experiment and simulation, the role of e-e correlation in SDI is discussed. It is shown that the inclusion of e-e correlation is necessary to reproduce the momentum distribution of electrons.

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Anomalous Terahertz Reflection and Scattering by Flexible and Conformal Coding Metamaterials

Liu

Yang

et al. 2015

Advanced Optical Materials

194

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Arbitrary control of terahertz (THz) waves remains a significant challenge although it promises many important applications. Here, a method to tailor the reflection and scattering of THz waves in an anomalous manner by using 1‐bit coding metamaterials is presented. Specific coding sequences result in various THz far‐field reflection and scattering patterns, ranging from a single beam to two, three, and numerous beams, which depart obviously from the ordinary Snell's law of reflection. By optimizing the coding sequences, a wideband THz thin film metamaterial with extremely low specular reflection, due to the scattering of the incident wave into various directions, is demonstrated. As a result, the reflection from a flat and flexible metamaterial can be nearly uniformly distributed in the half space with small intensity at each specific direction, manifesting a diffuse reflection from a rough surface. Both simulation and experimental results show that a reflectivity less than −10 dB is achieved over a wide frequency range from 0.8 to 1.4 THz, and it is insensitive to the polarization of the incident wave. This work reveals new opportunities arising from coding metamaterials in effective manipulation of THz wave propagation and may offer widespread applications.

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Molecular Orientation and Alignment by Intense Single-Cycle THz Pulses

Cited by 306 publications

References 49 publications

Observation of the field-free orientation of a symmetric-top molecule by terahertz laser pulses at high temperature

Observation of the field-free orientation of a symmetric-top molecule by terahertz laser pulses at high temperature

Revealing the role of electron correlation in sequential double ionization

Anomalous Terahertz Reflection and Scattering by Flexible and Conformal Coding Metamaterials

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