TY - JOUR

T1 - Frequency-tunable transient Cherenkov radiation from an inhomogeneous medium

AU - Pakhomov, Anton

AU - Arkhipov, Rostislav

N1 - Publisher Copyright: © 2021 American Physical Society.

PY - 2021/9/8

Y1 - 2021/9/8

N2 - We propose a scheme to generate coherent radiation with a tunable frequency spectrum based on the excitation of an inhomogeneous thin layer of a resonant medium by an ultrashort pulse. The Cherenkov-type radiation emitted in a transient stage, i.e., while the excitation wavefront is still propagating over the medium, is shown to contain additional frequency components, which are determined by the spatial frequency components of the medium's density distribution and the excitation geometry. We demonstrate that the spectral content of this transient radiation can be adjusted in wide limits by controlling the spatial density distribution of the resonant medium and the shape of the excitation wavefront. Our theoretical results pave the way towards simple and compact swept-frequency or frequency-tunable optical oscillators as well as sources of the frequency-modulated optical radiation.

AB - We propose a scheme to generate coherent radiation with a tunable frequency spectrum based on the excitation of an inhomogeneous thin layer of a resonant medium by an ultrashort pulse. The Cherenkov-type radiation emitted in a transient stage, i.e., while the excitation wavefront is still propagating over the medium, is shown to contain additional frequency components, which are determined by the spatial frequency components of the medium's density distribution and the excitation geometry. We demonstrate that the spectral content of this transient radiation can be adjusted in wide limits by controlling the spatial density distribution of the resonant medium and the shape of the excitation wavefront. Our theoretical results pave the way towards simple and compact swept-frequency or frequency-tunable optical oscillators as well as sources of the frequency-modulated optical radiation.

KW - EMISSION

KW - POLARIZATION

KW - GENERATION

KW - ATTOSECOND

KW - DISCOVERY

KW - LIGHT

UR - http://www.scopus.com/inward/record.url?scp=85114868289&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/a722a522-110e-3e83-b8c3-70cdc3f2400b/

U2 - 10.1103/physreva.104.033509

DO - 10.1103/physreva.104.033509

M3 - Article

AN - SCOPUS:85114868289

VL - 104

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 3

M1 - 033509

ER -