On Focusing of Broadband Terahertz Pulses
- Authors: Malevich V.L.1, Sinitsyn G.V.1, Rosanov N.N.2,3,4
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Affiliations:
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus
- Vavilov State Optical Institute
- ITMO University
- Ioffe Physical Technical Institute, Russian Academy of Sciences
- Issue: Vol 127, No 4 (2019)
- Pages: 719-722
- Section: Physical Optics
- URL: https://journals.rcsi.science/0030-400X/article/view/166128
- DOI: https://doi.org/10.1134/S0030400X19100163
- ID: 166128
Cite item
Abstract
The particular features of the focusing of a broadband THz pulse with a Gaussian transverse amplitude distribution by a lens are investigated theoretically. The expressions for the spatiotemporal field distribution on the beam axis and in the focal plane of the lens are obtained in the quasi-optical approximation. It is shown that, for the focusing to be efficient, it is necessary to use lenses with a focal distance that is much shorter than the characteristic diffraction length at the frequency corresponding to the spectral maximum of the THz pulse.
Keywords
About the authors
V. L. Malevich
B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus
Author for correspondence.
Email: v.malevich@ifanbel.bas-net.by
Belarus, Minsk, 220072
G. V. Sinitsyn
B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus
Email: nnrosanov@mail.ru
Belarus, Minsk, 220072
N. N. Rosanov
Vavilov State Optical Institute; ITMO University; Ioffe Physical Technical Institute, Russian Academy of Sciences
Author for correspondence.
Email: nnrosanov@mail.ru
Russian Federation, St. Petersburg, 199053; St. Petersburg, 197101; St. Petersburg, 194021
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