TY - JOUR
T1 - Spatially distributed PT symmetric refractive index using four-wave-mixing in a double-Λ setup
AU - Kudriašov, Viačeslav
AU - Liao, Wen Te
AU - Juzeliūnas, Gediminas
AU - Hamedi, Hamid R.
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/8
Y1 - 2024/8
N2 - We propose a scheme for designing Parity-Time (PT) spatially symmetric structures of the refractive index for a generated probe field propagating in a double-Λ (DL) atomic medium. By creating position-dependent atomic coherences and manipulating them controllably—via applied control fields and one-photon detuning— we achieve PT symmetry of the refractive index. This causes the refractive index components to become symmetric/antisymmetric functions of the transverse coordinate. We demonstrate that, in order to achieve PT condition for DL, a four-wave mixing process can be employed, with one of the control fields and detuning being anti-symmetric functions of the transverse coordinates, while the other control field being either symmetric or constant. Furthermore, we illustrate that this PT symmetry holds for different distances along the propagation direction and analyze its dependence on the phase matching conditions.
AB - We propose a scheme for designing Parity-Time (PT) spatially symmetric structures of the refractive index for a generated probe field propagating in a double-Λ (DL) atomic medium. By creating position-dependent atomic coherences and manipulating them controllably—via applied control fields and one-photon detuning— we achieve PT symmetry of the refractive index. This causes the refractive index components to become symmetric/antisymmetric functions of the transverse coordinate. We demonstrate that, in order to achieve PT condition for DL, a four-wave mixing process can be employed, with one of the control fields and detuning being anti-symmetric functions of the transverse coordinates, while the other control field being either symmetric or constant. Furthermore, we illustrate that this PT symmetry holds for different distances along the propagation direction and analyze its dependence on the phase matching conditions.
KW - Double-Lambda atomic system
KW - Four-wave mixing
KW - Parity-time symmetry
UR - http://www.scopus.com/inward/record.url?scp=85185395600&partnerID=8YFLogxK
U2 - 10.1016/j.optlastec.2024.110733
DO - 10.1016/j.optlastec.2024.110733
M3 - 期刊論文
AN - SCOPUS:85185395600
SN - 0030-3992
VL - 175
JO - Optics and Laser Technology
JF - Optics and Laser Technology
M1 - 110733
ER -