scholarly journals High-harmonic generation at the nanoscale boosted by bound states in the continuum

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Luca Carletti ◽  
Sergey S. Kruk ◽  
Andrey A. Bogdanov ◽  
Costantino De Angelis ◽  
Yuri Kivshar
Keyword(s):  
Harmonic Generation ◽  
Bound States ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
The Continuum

Silicon metasurfaces with bound states in the continuum for high-harmonic generation

2021 ◽  
Author(s):  
Kirill L. Koshelev ◽  
George Zograf ◽  
Viacheslav Korolev ◽  
Anastasia Zalogina ◽  
Duk-Yong Choi ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Bound States ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
The Continuum

High-Harmonic Generation in Dielectric Metasurfaces Empowered by Bound States in the Continuum

2020 ◽  
Author(s):  
George Zograf ◽  
Anastasia Zalogina ◽  
Kirill Koshelev ◽  
Duk-Yong Choi ◽  
Viacheslav Korolev ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Bound States ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
The Continuum

scholarly journals High-harmonic generation in one-dimensional Mott insulators

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Yuta Murakami ◽  
Shintaro Takayoshi ◽  
Akihisa Koga ◽  
Philipp Werner
Keyword(s):  
Harmonic Generation ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Mott Insulators ◽  
One Dimensional

scholarly journals Few-Cycle Infrared Pulse Evolving in FEL Oscillators and Its Application to High-Harmonic Generation for Attosecond Ultraviolet and X-ray Pulses

Atoms ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 15
Author(s):  
Ryoichi Hajima
Keyword(s):  
Harmonic Generation ◽  
Short Pulse ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Pulse Generation ◽  
Solid State Lasers ◽  
Linear Accelerators ◽  
X Ray ◽  
Ultrafast Science ◽  
Historical Remarks

Generation of few-cycle optical pulses in free-electron laser (FEL) oscillators has been experimentally demonstrated in FEL facilities based on normal-conducting and superconducting linear accelerators. Analytical and numerical studies have revealed that the few-cycle FEL lasing can be explained in the frame of superradiance, cooperative emission from self-bunched systems. In the present paper, we review historical remarks of superradiance FEL experiments in short-pulse FEL oscillators with emphasis on the few-cycle pulse generation and discuss the application of the few-cycle FEL pulses to the scheme of FEL-HHG, utilization of infrared FEL pulses to drive high-harmonic generation (HHG) from gas and solid targets. The FEL-HHG enables one to explore ultrafast science with attosecond ultraviolet and X-ray pulses with a MHz repetition rate, which is difficult with HHG driven by solid-state lasers. A research program has been launched to develop technologies for the FEL-HHG and to conduct a proof-of-concept experiment of FEL-HHG.

scholarly journals Transient absorption spectroscopy using high harmonic generation: a review of ultrafast X-ray dynamics in molecules and solids

2019 ◽  
Vol 377 (2145) ◽  
pp. 20170463 ◽  
Author(s):  
Romain Geneaux ◽  
Hugo J. B. Marroux ◽  
Alexander Guggenmos ◽  
Daniel M. Neumark ◽  
Stephen R. Leone
Keyword(s):  
Time Scales ◽  
Harmonic Generation ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Transient Absorption Spectroscopy ◽  
Spectroscopic Techniques ◽  
X Rays ◽  
X Ray

Attosecond science opened the door to observing nuclear and electronic dynamics in real time and has begun to expand beyond its traditional grounds. Among several spectroscopic techniques, X-ray transient absorption spectroscopy has become key in understanding matter on ultrafast time scales. In this review, we illustrate the capabilities of this unique tool through a number of iconic experiments. We outline how coherent broadband X-ray radiation, emitted in high-harmonic generation, can be used to follow dynamics in increasingly complex systems. Experiments performed in both molecules and solids are discussed at length, on time scales ranging from attoseconds to picoseconds, and in perturbative or strong-field excitation regimes. This article is part of the theme issue ‘Measurement of ultrafast electronic and structural dynamics with X-rays’.

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