THz radiation using the two plasmon decay and the backward Raman scattering

Backward Raman scattering in a relativistic electron beam and intense THz light

A new type of the THz laser is proposed. A coherent tera-hertz light is emitted through the backward Raman scattering between a visible light laser and a relativistic electron beam. The threshold conditions for the laser intensity and the electron beam density are identified. The scheme may lead to one of the most intense tera-hertz coherent light sources.

THz light source based on the two-stream instability and backward Raman scattering

A new scheme of the THz light source is proposed. The excitation of the Langmuir wave in a moderately relativistic electron beam via the two-stream instability and the subsequent interaction of the excited Langmuir wave with the visible light laser results in THz ligh via the Raman scattering. The cost of the current scheme could be cheaper than the conventional technologies by using the electron beam from cathodes and low-intensity infra-red laser.

THz amplification via a Raman scattering

A THz light amplifier and the corresponding methods are proposed, based on the Raman interaction between a THz light and visible light lasers. Two lasers, with their frequencies differing by that of a Langmuir wave, counter-propagate inside a background plasma, exciting a rather strong Langmuir wave. The THz light amplification occurs through the non-resonant Raman scattering between the THz light and one of the lasers in the presence of the mentioned Langmuir wave. It is normally the case that the non-resonant scattering does not exchange the energy between E \&M fields but the author demonst…

掺杂等离子体金纳米棒的二甲基丙烯酸酯聚合物在单发高能飞秒激光辐照下形成的弹坑壁的拉曼光谱表征

Raman spectroscopic characterization of crater walls formed upon single-shot high energy femtosecond laser irradiation of dimethacrylate polymer doped with plasmonic gold nanorods

该研究通过拉曼光谱分析单发飞秒激光在掺金纳米棒聚合物中形成的弹坑壁，发现新的C–D/N–D振动峰，并推测其源于等离子体增强强激光场诱导的核反应。

Soft x-ray generation based on the two-plasmon decay and the backward Raman scattering in a moderately relativistic electron beam

A scheme of soft-xray radiation is proposed. In the scheme, a moderately intense laser excites plasmons via the two-plasmon decay in a relativistic electron beam. As the second laser encounters the electron beam in the opposite direction, it emits soft x-rays via the backward Raman scattering. Our analysis suggests that the effective cross-section of this scattering is higher than the Thomson scattering and that the conversion efficiency from the pump laser to the soft x-ray could be very high in the optimal scenario. USing the plasmon pump with duration of 1-100 pico-second and the electron b…

Hybrid Stimulated Raman Scattering -- Two Plasmon Decay Instability and 3/2 Harmonic in Steep-Gradient Femtosecond Plasmas

The hybrid Stimulated Raman Scattering - Two Plasmon Decay instability had shown to play the dominant role for plasma waves excitation and energy absorption at interaction of very intense femtosecond obliquely incident $p$-polarized laser pulse (intensity $10^{17}-5\cdot10^{19}$ W/cm$^2$) with a steep gradient ($L\sim λ$) plasma near the quarter critical surface, i.e. within the typical for modern experiments conditions. The plasmons are excited as two wave packets confined near this surface with very wide $\approx ω_0/c$ spatial spectra along its normal. Hence, phase matching conditions for 3…