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Photon deceleration in plasma wakes generates single-cycle relativistic tunable infrared pulses.


ABSTRACT: Availability of relativistically intense, single-cycle, tunable infrared sources will open up new areas of relativistic nonlinear optics of plasmas, impulse IR spectroscopy and pump-probe experiments in the molecular fingerprint region. However, generation of such pulses is still a challenge by current methods. Recently, it has been proposed that time dependent refractive index associated with laser-produced nonlinear wakes in a suitably designed plasma density structure rapidly frequency down-converts photons. The longest wavelength photons slip backwards relative to the evolving laser pulse to form a single-cycle pulse within the nearly evacuated wake cavity. This process is called photon deceleration. Here, we demonstrate this scheme for generating high-power (~100?GW), near single-cycle, wavelength tunable (3-20?µm), infrared pulses using an 810?nm drive laser by tuning the density profile of the plasma. We also demonstrate that these pulses can be used to in-situ probe the transient and nonlinear wakes themselves.

SUBMITTER: Nie Z 

PROVIDER: S-EPMC7271200 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Photon deceleration in plasma wakes generates single-cycle relativistic tunable infrared pulses.

Nie Zan Z   Pai Chih-Hao CH   Zhang Jie J   Ning Xiaonan X   Hua Jianfei J   He Yunxiao Y   Wu Yipeng Y   Su Qianqian Q   Liu Shuang S   Ma Yue Y   Cheng Zhi Z   Lu Wei W   Chu Hsu-Hsin HH   Wang Jyhpyng J   Zhang Chaojie C   Mori Warren B WB   Joshi Chan C  

Nature communications 20200603 1


Availability of relativistically intense, single-cycle, tunable infrared sources will open up new areas of relativistic nonlinear optics of plasmas, impulse IR spectroscopy and pump-probe experiments in the molecular fingerprint region. However, generation of such pulses is still a challenge by current methods. Recently, it has been proposed that time dependent refractive index associated with laser-produced nonlinear wakes in a suitably designed plasma density structure rapidly frequency down-c  ...[more]

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