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Spectrally intense terahertz source based on triangular Selenium.

Mostafa Shalaby1, Christoph P Hauri2

  • 11] SwissFEL, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland [2] Physics Department, ETH Zurich, 8093 Zurich, Switzerland.

Scientific Reports
|January 28, 2015
PubMed
Summary
This summary is machine-generated.

We introduce triangular Selenium (Se) as a novel terahertz (THz) emitter. Numerical results show Se offers superior spectral density and efficiency for intense THz generation compared to existing crystal-based sources.

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Area of Science:

  • Solid-state physics
  • Optics and photonics
  • Materials science

Background:

  • Terahertz (THz) sources are crucial for various applications, with intensity determined by spectral density.
  • Current THz generation methods often rely on specific crystal properties for efficient output.

Purpose of the Study:

  • To introduce triangular Selenium (Se) as a novel material for intense THz generation.
  • To numerically demonstrate the superior performance of Se compared to conventional THz emitter crystals.

Main Methods:

  • Numerical simulations were employed to evaluate the THz emission properties of triangular Selenium.
  • The optical rectification process in Selenium was analyzed to determine spectral density and conversion efficiency.

Main Results:

  • Triangular Selenium exhibits excellent phase matching, enabling the use of elongated crystals.
  • This results in high spectral flatness, a broad THz bandwidth (0.5-3.5 THz), high conversion efficiency, and significant THz pulse energy.
  • The spectral THz density generated in Selenium surpasses that of contemporary crystal-based THz sources.

Conclusions:

  • Triangular Selenium is a promising novel material for generating intense and broadband THz radiation.
  • Its superior performance offers a significant advancement over existing THz emitter technologies.