Temporal field and frequency spectrum of intense femtosecond radiation dynamics in the process of plasma formation in a dielectric medium

Stumpf, S. A.; Ponomareva, Evgenia A.; Tcypkin, Anton; Putilin, S. É.; Korolev, A. A.; Козлов, С. А.

doi:10.1088/1555-6611/ab4dac

Cited by 5 publications

(5 citation statements)

References 38 publications

(50 reference statements)

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“…A theoretical model which describes the physics of ultrashort pulses has also been used in the THz generation from liquid water 147,148 . In this model, the dynamics of the radiation field, the evolution of the current density of quasi-free electrons, and the dynamics of the concentration of electrons have been included,…”

Section: Thz Generation From Liquid Plasma Induced By Singlecolor Pulsementioning

confidence: 99%

“…This dependence was also explored in the case of THz generation from liquid plasma. It was observed that from either water film or line, the optimal pulse duration for THz wave generation is in the order of subpicosecond 143,147,148,152 . This observation results from the dependence of plasma formation in water on the optical pulse duration, in which the electron density (corresponding to the pulse width) plays an important role 153 .…”

Section: Thz Intensitymentioning

confidence: 99%

“…In most of the experiments, the linear dependence of THz intensity on the energy of laser pulse was observed before the saturation of THz signal 144,146 . However, there are measurements revealing that the THz energy scales quasi-quadratically with the optical pulse energy 146,147,154 . The difference of the observed dependence may result from the liquid target geometry and the excitation energy of the laser pulse.…”

Section: Thz Intensitymentioning

confidence: 99%

“…Apart from the water, other liquids have been used as the target in the THz generation from liquid plasma, such as -pinene, p-xylene, and ethanol 147,153 . The spectra of THz waves generated from -pinene and water are shown in Fig.…”

Section: Spectrummentioning

confidence: 99%

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Terahertz generation from laser-induced plasma

Wang¹,

Zhang²

2022

OES

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Interest of the research in terahertz (THz) wave has been strongly motivated by its wide applications in the fields of physics, chemistry, biology, and engineering. Developing efficient and reliable THz source is of uttermost priority in these researches. Numerous attempts have been made in fulfilling the THz generation. Greatly benefited from the progress of the ultrafast pulses, the laser-induced-plasma is one of the auspicious tools to provide desirable THz waves, owing to its superiorities in high power threshold, intense THz signal, and ultrawide THz spectrum. This paper reviews the physics and progress of the THz generation from the laser-induced plasmas, which are produced by gas, liquid, and solid. The characteristics of the emitted THz waves are also included. There are many complicated physical processes involved in the interactions of laser-plasma, making various laser-plasma scenarios in the THz generations. In view of this, we will only focus on the THz generation classified by physical mechanisms. Finally, we discuss a perspective on the future of THz generation from the laser-induced plasma, as well as its involved challenges.

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Section: Thz Generation From Liquid Plasma Induced By Singlecolor Pulsementioning

confidence: 99%

Section: Thz Intensitymentioning

confidence: 99%

Section: Thz Intensitymentioning

confidence: 99%

Section: Spectrummentioning

confidence: 99%

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Terahertz generation from laser-induced plasma

Wang¹,

Zhang²

2022

OES

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“…However, multiphoton and tunneling ionization are more important in the case of gas. For more information on the theoretical analysis about single-color excitation, please check [15,50,62,63].…”

mentioning

confidence: 99%

Broadband THz Sources from Gases to Liquids

et al. 2021

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Matters are generally classified within four states: solid, liquid, gas, and plasma. Three of the four states of matter (solid, gas, and plasma) have been used for THz wave generation with short laser pulse excitation for decades, including the recent vigorous development of THz photonics in gases (air plasma). However, the demonstration of THz generation from liquids was conspicuously absent. It is well known that water, the most common liquid, is a strong absorber in the far infrared range. Therefore, liquid water has historically been sworn off as a source for THz radiation. Recently, broadband THz wave generation from a flowing liquid target has been experimentally demonstrated through laser-induced microplasma. The liquid target as the THz source presents unique properties. Specifically, liquids have the comparable material density to that of solids, meaning that laser pulses over a certain area will interact with three orders more molecules than an equivalent cross-section of gases. In contrast with solid targets, the fluidity of liquid allows every laser pulse to interact with a fresh area on the target, meaning that material damage or degradation is not an issue with the high-repetition rate intense laser pulses. These make liquids very promising candidates for the investigation of high-energy-density plasma, as well as the possibility of being the next generation of THz sources.

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Terahertz-induced second harmonic radiation from transient electron behavior in water

Zhao,

Tan,

et al. 2024

Applied Physics Letters

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Laser-induced liquid plasma is expected to be an efficient medium for a new generation of terahertz (THz) devices. However, the mechanism of interaction between liquid plasma and THz waves is currently unclear. Here, we observed two phenomena related to THz wave interaction with water plasma: THz-induced second harmonic (TISH) radiation in water plasma and THz absorption by water plasma. We established an internal relationship between these two macroscopic phenomena by utilizing a photocurrent model and the Drude model. Using liquid water and air as examples, a scheme is proposed to analyze the photonic characteristics of plasma in different physical states. This study offers an experimental basis for predicting the TISH phenomenon across various substances and states and also provides the theoretical support for the practical implementation of liquid-based detection of THz waves.

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Temporal field and frequency spectrum of intense femtosecond radiation dynamics in the process of plasma formation in a dielectric medium

Cited by 5 publications

References 38 publications

Terahertz generation from laser-induced plasma

Terahertz generation from laser-induced plasma

Broadband THz Sources from Gases to Liquids

Terahertz-induced second harmonic radiation from transient electron behavior in water

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