Direct imaging of molecular rotation with high-order-harmonic generation

He, Yanqing; He, Lixin; Lan, Pengfei; Wang, Baoning; Li, Liang; Xiao, Zhu; Cao, Wei; Lu, Peixiang

doi:10.1103/physreva.99.053419

Cited by 47 publications

(23 citation statements)

References 72 publications

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“…Depending on their different boundary conditions, plasmons in metals can be divided into bulk plasmons and surface plasmons (SPs) [32][33][34]. Furthermore, surface plasmons can be subdivided into two categories: the first is conductive surface plasmon polaritons (SPPs), which occur at the metal-dielectric interface in the form of longitudinal waves, and the second is localized surface plasmons (LSPs), which are bound near metal structures.…”

Section: Basic Principle Of Surface Plasmonsmentioning

confidence: 99%

Principle and Applications of the Coupling of Surface Plasmons and Excitons

Liu

et al. 2020

Applied Sciences

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Surface plasmons have been attracting increasing attention and have been studied extensively in recent decades because of their half-light and half-material polarized properties. On the one hand, the tightly confined surface plasmonic mode may reduce the size of integrated optical devices beyond the diffraction limit; on the other hand, it provides an approach toward enhancement of the interactions between light and matter. In recent experiments, researchers have realized promising applications for surface plasmons in quantum information processing, ultra-low-power lasers, and micro-nano processing devices by using plasmonic structures, which have demonstrated their superiority over traditional optics structures. In this paper, we introduce the theoretical principle of surface plasmons and review the research work related to the interactions between plasmons and excitons. Some perspectives with regard to the future development of plasmonic coupling are also outlined.

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Section: Basic Principle Of Surface Plasmonsmentioning

confidence: 99%

Principle and Applications of the Coupling of Surface Plasmons and Excitons

Liu

et al. 2020

Applied Sciences

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“…[ 16 ] Recently, angle‐resolved high‐order‐harmonic spectroscopy was used for generation of a molecular “rotational movie” with the help of iterative machine learning procedure. [ 17 ]…”

Section: Introductionmentioning

confidence: 99%

Optical Imaging of Coherent Molecular Rotors

Bert

Prost

Tutunnikov

et al. 2020

Laser & Photonics Reviews

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Short laser pulses are widely used for controlling molecular rotational degrees of freedom and inducing molecular alignment, orientation, unidirectional rotation, and other types of coherent rotational motion. To follow the ultrafast rotational dynamics in real time, several techniques for producing molecular movies have been proposed based on the Coulomb explosion of rotating molecules, or recovering molecular orientation from the angular distribution of high harmonics. The present work offers and demonstrates a novel nondestructive optical method for direct visualization and recording of movies of coherent rotational dynamics in a molecular gas. The technique is based on imaging the time-dependent polarization dynamics of a probe light propagating through a gas of coherently rotating molecules. The probe pulse continues through a radial polarizer, and is then recorded by a camera. The technique is illustrated by implementing it with two examples of time-resolved rotational dynamics: alignment-antialignment cycles in a molecular gas excited by a single linearly polarized laser pulse, and unidirectional molecular rotation induced by a pulse with twisted polarization. This method may open new avenues in studies on fast chemical transformation phenomena and ultrafast molecular dynamics caused by strong laser fields of various complexities.

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“…[ 1 ] During the recombination step, the returning electrons release its accumulated kinetic energy as bright coherent extreme ultraviolet (EUV) and soft X‐Ray radiations with attosecond duration. [ 2–6 ] The generation of attosecond pulses offers the opportunity to probe and control ultrafast electron dynamics inside atoms, [ 7–13 ] molecules, [ 14–18 ] nanostructures, and solids [ 19–26 ] with unprecedented spatial and temporal resolutions, which has been a topic of great interest in attosecond science.…”

Section: Introductionmentioning

confidence: 99%

Generation of Near‐Circularly Polarized Attosecond Pulse with Tunable Helicity by Unidirectionally Rotating Laser Field

Yuan

Njoroge

et al. 2020

Annalen der Physik

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A method to produce circularly polarized attosecond pulses with tunable helicity from CO molecule by using an unidirectionally rotating laser field is proposed. It is found that broadband harmonic supercontinuum with circular polarization can be generated from the oriented CO molecule. This enables the production sub-100 attosecond isolated pulse with the ellipticity as high as 0.9 at the macroscopic level. Moreover, the helicity of the generated high-order harmonics and the attosecond pulse can be tuned by adjusting the orientation of the CO molecule. This method will be beneficial for the studies on chiral-specific dynamics and magnetic circular dichroism on an attosecond time scale.

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Direct imaging of molecular rotation with high-order-harmonic generation

Cited by 47 publications

References 72 publications

Principle and Applications of the Coupling of Surface Plasmons and Excitons

Principle and Applications of the Coupling of Surface Plasmons and Excitons

Optical Imaging of Coherent Molecular Rotors

Generation of Near‐Circularly Polarized Attosecond Pulse with Tunable Helicity by Unidirectionally Rotating Laser Field

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