Passive magnetic-free broadband optical isolator based on unidirectional self-induced transparency.
Opt Express
; 32(7): 11010-11021, 2024 Mar 25.
Article
em En
| MEDLINE
| ID: mdl-38570960
ABSTRACT
Achieving a broadband nonreciprocal device without gain and any external bias is very challenging and highly desirable for modern photonic technologies and quantum networks. Here we theoretically propose a passive and magnetic-free all-optical isolator for a femtosecond laser pulse by exploiting a new mechanism of unidirectional self-induced transparency, obtained with a nonlinear medium followed by a normal absorbing medium at one side. The transmission contrast between the forward and backward directions can reach 14.3 dB for a 2π - 5â
fs laser pulse. The 20 dB bandwidth is about 56â
nm, already comparable with a magneto-optical isolator. This work provides a new mechanism which may benefit non-magnetic isolation of ultrashort laser pulses.
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MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article