Diamond diffractive lens with a continuous profile for powerful terahertz radiation

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 inv...

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Bibliographic Details
Published in:Optics letters 2021-01, Vol.46 (2), p.340-343
Main Authors: Komlenok, Maxim, Kononenko, Taras, Sovyk, Dmitry, Pavelyev, Vladimir, Knyazev, Boris, Ashkinazi, Evgeny, Reshetnikov, Anton, Komandin, Gennadii, Pashinin, Vladimir, Ralchenko, Victor, Konov, Vitaly
Format: Article
Language:English
Subjects:
Chemical vapor deposition
Diamonds
Diffraction efficiency
Focal plane
Free electron lasers
Laser ablation
Lasers
Lenses
Replication
Silicon substrates
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.414097