Terahertz wave emission from water lines

Feng, Shijia; Dong, Liquan; Wu, Tong; Tan, Yong; Zhang, Rui; Zhang, Liangliang; Zhang, Cunlin; Zhao, Yuejin

doi:10.3788/col202018.023202

Cited by 12 publications

(10 citation statements)

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“…The detection system is rotated around the water line from 15°to 165°(limited by the finite space) with respect to the laser beam axis to measure the angular distribution when the THz signal is optimized at a detection angle of 90°(i.e., lateral THz emission is detected). The results on the distribution of [132] . Figures reprinted from Ref.…”

Section: Angular Distribution Of Thz Radiation From Water Linesmentioning

confidence: 99%

Plasma-based terahertz wave photonics in gas and liquid phases

Chen

Liu

et al. 2023

Photonics Insights

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Ultra-broadband, intense, coherent terahertz (THz) radiation can be generated, detected, and manipulated using laser-induced gas or liquid plasma as both the THz wave transmitter and detector, with a frequency coverage spanning across and beyond the whole "THz gap." Such a research topic is termed "plasma-based THz wave photonics in gas and liquid phases." In this paper, we review the most important experimental and theoretical works of the topic in the non-relativistic region with pump laser intensity below 10 18 W∕cm 2 .

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Section: Angular Distribution Of Thz Radiation From Water Linesmentioning

confidence: 99%

Plasma-based terahertz wave photonics in gas and liquid phases

Chen

Liu

et al. 2023

Photonics Insights

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“…Understanding the physical mechanism for THz generation from liquid target is essential for advancing THz aqueous sources. A diploe model based on the ponderomotive force is proposed to explain the THz generation from laser-induced liquid plasma 144 . A schematic of the dipole model, which shows the schematic diagram of the THz radiation process, is shown in Fig.…”

Section: Thz Generation From Liquid Plasma Induced By Singlecolor Pulsementioning

confidence: 99%

“…A similar result is also observed when a water line is used as a THz source. In these experiments, the optimal incidence angel depends on the asymmetry optical excitation, project of dipole component in x direction and total internal reflection of THz wave at the liquid/air interface 144,145 .…”

Section: Thz Intensitymentioning

confidence: 99%

“…The dependence of THz electric field strength on the energy of laser pulse has also been investigated. 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 .…”

Section: Thz Intensitymentioning

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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“…Dey et al reported THz wave generation from ionized liquids by focusing intense laser into a cuvette [11]. With successive studies [12][13][14][15][49][50][51], THz wave generation from liquids shows different properties comparing to that from other targets. In this paper, we review recent studies of THz wave generation from flowing liquid targets as well as the ultrafast dynamics of liquids under intense THz excitation.…”

Section: Introductionmentioning

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 wave emission from water lines

Cited by 12 publications

References 0 publications

Plasma-based terahertz wave photonics in gas and liquid phases

Plasma-based terahertz wave photonics in gas and liquid phases

Terahertz generation from laser-induced plasma

Broadband THz Sources from Gases to Liquids

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