Diamond diffractive lens with a continuous profile for powerful terahertz radiation

Maxim Komlenok, Taras Kononenko, Dmitry Sovyk, Vladimir Pavelyev, Boris Knyazev, Evgeny Ashkinazi, Anton Reshetnikov, Gennadii Komandin, Vladimir Pashinin, Victor Ralchenko, Vitaly Konov

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

An increase in the radiation power of terahertz (THz) sources requires the development of new optics working with it. The laser-assisted replication technique is proposed to fabricate the diamond cylindrical diffractive lens with a continuous profile for the THz range. The procedure involves the inverted structuring of a silicon substrate by laser ablation for its further replication to the diamond surface utilizing the chemical vapor deposition process. Testing of the fabricated lens performed with a free-electron laser at the wavelength of 141 µm has demonstrated high diffraction efficiency (95 ± 5%) and a good agreement between the measured and expected intensity distribution in the focal plane.

Original languageEnglish
Pages (from-to)340-343
Number of pages4
JournalOptics Letters
Volume46
Issue number2
DOIs
Publication statusPublished - 15 Jan 2021

OECD FOS+WOS

  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY
  • 1.03.SY OPTICS

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