Off-axis metallic diffractive lens for terahertz beams

Agnieszka Siemion , Andrzej Siemion , Michał Makowski , Maciej Sypek , Emilie H�rault , Fr�d�ric Garet , Jean-Louis Coutaz


A diffractive optical element for off-axis focusing of terahertz radiation is presented. It was designed in a nonparaxial regime and manufactured in a metal slab by laser cutting of curved stripes. The optical function of the structure includes focusing and deflecting the illuminating beam of a chosen frequency in a particular place. Therefore, the element acts as both a spatial and a spectral filter; hence it is especially suitable for separating the terahertz signal from a broadband thermal load in passive detection devices. The experimental evaluation of the proposed diffractive lens by means of time-domain spectroscopy is presented and discussed.
Author Agnieszka Siemion (FP / OPD)
Agnieszka Siemion,,
- Optics and Photonics Division
, Andrzej Siemion
Andrzej Siemion,,
, Michał Makowski (FP / OPD)
Michał Makowski,,
- Optics and Photonics Division
, Maciej Sypek (FP / OPD)
Maciej Sypek,,
- Optics and Photonics Division
, Emilie H�rault
Emilie H�rault,,
, Fr�d�ric Garet - [Universite Savoie Mont Blanc]
Fr�d�ric Garet,,
, Jean-Louis Coutaz - [Universite Savoie Mont Blanc]
Jean-Louis Coutaz,,
Journal seriesOptics Letters, ISSN 0146-9592, (A 40 pkt)
Issue year2011
Keywords in EnglishDiffractive optics, Integrated optics devices, Spectroscopy, teraherz, Terahertz imaging
ASJC Classification3107 Atomic and Molecular Physics, and Optics
Score (nominal)40
Publication indicators Scopus Citations = 21; WoS Citations = 21; Scopus SNIP (Source Normalised Impact per Paper): 2011 = 2.453; WoS Impact Factor: 2011 = 3.399 (2) - 2011=3.387 (5)
Citation count*25 (2020-01-01)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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