Abstract

Resonant Effects in Terahertz Generation with Laser-Induced Gas Plasmas

Highlights

  • Research on intense terahertz (THz) electromagnetic sources has received an increasing attention owing to numerous applications, for example, in timedomain spectroscopy, biomedical imaging or security screening [1]

  • It was shown later that the plasma built-up by tunneling photoionization is necessary to explain the high amplitudes of the THz field [4], and a quasi-dc plasma current generated by the temporally asymmetric two-color field is responsible for THz emission [5]

  • One can expect that the gas plasma features plasmonic resonances which may have a strong impact on the

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Summary

Introduction

Research on intense terahertz (THz) electromagnetic sources has received an increasing attention owing to numerous applications, for example, in timedomain spectroscopy, biomedical imaging or security screening [1]. First reported by Cook et al [3], THz emission from intense two-color pulses was initially attributed to optical rectification via third-order nonlinearity. Numerous experimental results show that the laser-induced free electron density has a strong impact on the THz emission [4,6,7]. One can expect that the gas plasma features plasmonic resonances which may have a strong impact on the

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