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High harmonic generation

About: High harmonic generation is a research topic. Over the lifetime, 11694 publications have been published within this topic receiving 222650 citations. The topic is also known as: HHG.


Papers
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Journal ArticleDOI
TL;DR: A new dynamic two-center interference effect in high-harmonic generation from H2, in which the attosecond nuclear motion of H2+ initiated at ionization causes interference to be observed at lower harmonic orders than would be the case for static nuclei.
Abstract: We report a new dynamic two-center interference effect in high-harmonic generation from ${\mathrm{H}}_{2}$, in which the attosecond nuclear motion of ${\mathrm{H}}_{2}^{+}$ initiated at ionization causes interference to be observed at lower harmonic orders than would be the case for static nuclei. To enable this measurement we utilize a recently developed technique for probing the attosecond nuclear dynamics of small molecules. The experimental results are reproduced by a theoretical analysis based upon the strong-field approximation which incorporates the temporally dependent two-center interference term.

89 citations

Proceedings ArticleDOI
20 Apr 1997
TL;DR: In this article, the application of the revised IEEE-519 Harmonics standards to typical industrial facilities employing adjustable speed drives (ASDs) is discussed, and requirements for control of the harmonic currents are developed as a function of the ASD characteristics.
Abstract: This paper discusses the application of the revised IEEE-519 Harmonics standards to typical industrial facilities employing adjustable speed drives (ASDs). The harmonic generation characteristics of ASDs are described, Requirements for control of the harmonic currents are developed as a function of the ASD characteristics, overall plant loading level, power system characteristics, and power factor correction requirements. Filter design procedures are presented for controlling the harmonic currents injected onto the power system.

89 citations

Journal ArticleDOI
TL;DR: Th thin-film-based ultraefficient periodically-poled lithium niobate nonlinear waveguides are presented, leveraging actively-monitored ferroelectric domain reversal engineering and nanophotonic confinement to address growing demands in integrated-photonic frequency conversion, frequency metrology, atomic physics, and quantum optics.
Abstract: Chip-scale implementations of second-order nonlinear optics benefit from increased optical confinement that can lead to nonlinear interaction strengths that are orders of magnitude higher than bulk free-space configurations. Here, we present thin-film-based ultraefficient periodically-poled lithium niobate nonlinear waveguides, leveraging actively-monitored ferroelectric domain reversal engineering and nanophotonic confinement. The devices exhibit up to 4600 %W−1cm−2 conversion efficiency for second-harmonic generation, pumped around 1540 nm. In addition, we measure broadband sum-frequency generation across multiple telecom bands, from 1460 to 1620 nm. As an immediate application of the devices, we use pulses of picojoule-level energy to demonstrate second-harmonic generation with over 10% conversion in a 0.6-mm-long waveguide. Our ultracompact and highly efficient devices address growing demands in integrated-photonic frequency conversion, frequency metrology, atomic physics, and quantum optics, while offering a coherent link between the telecom and visible bands.

89 citations

Journal ArticleDOI
TL;DR: In this article, a significant improvement in frequency doubling efficiency of a cw output of a GaAlAs laser diode was described, up to 0.72 mW of 421 nm power was generated by illuminating a KNbO3 crystal with a 270 mW diffraction-limited beam generated by an externally injection-locked laser dioder array, operating in a singlemode and single-far field lobe.
Abstract: Significant improvement in frequency doubling efficiency of a cw output of a GaAlAs laser diode is described. Up to 0.72 mW of 421 nm power was generated by illuminating a KNbO3 crystal with a 270 mW diffraction‐limited beam generated by an externally injection‐locked laser diode array, operating in a single‐mode and single‐far‐field lobe.

89 citations

Journal ArticleDOI
TL;DR: In this article, a coupled modes analysis of second-harmonic generation in microdisk resonators is proposed, where whispering gallery modes can be used to obtain a combination of modal and geometrical quasi-phase matching to obtain efficient conversion in isotropic and nonferroelectric materials such as III-V semiconductor compounds.
Abstract: We propose a coupled modes analysis of second-harmonic generation in microdisk resonators. We demonstrate that whispering gallery modes can be used to obtain a combination of modal and geometrical quasi-phase-matching (without domain inversion) to obtain efficient conversion in isotropic and nonferroelectric materials such as III-V semiconductor compounds. Finally we use an analytical model to describe the coupling between a bus waveguide and the nonlinear microdisk to achieve an optimization scheme for practical configuration.

89 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023177
2022438
2021399
2020489
2019516
2018433