Interaction of surface plasmon polaritons and acoustic waves inside an acoustic cavityстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 октября 2017 г.
Аннотация:In this Letter, we introduce an approach for manipulation
of active plasmon polaritons via acoustic waves at subterahertz
frequency range. The acoustic structures considered
are designed as phononic Fabry–Perot microresonators
where mirrors are presented with an acoustic superlattice
and the structure’s surface, and a plasmonic grating is
placed on top of the acoustic cavity so formed. It provides
phonon localization in the vicinity of the plasmonic grating
at frequencies within the phononic stop band enhancing
phonon–light interaction. We consider phonon excitation
by shining a femtosecond laser pulse on the plasmonic
grating. Appropriate theoretical model was used to describe
the acoustic process caused by the pump laser pulse in the
GaAs/AlAs-based acoustic cavity with a gold grating on top.
Strongest modulation is achieved upon excitation of propagating
surface plasmon polaritons and hybridization of
propagating and localized plasmons. The relative changes
in the optical reflectivity of the structure are more than
an order of magnitude higher than for the structure without
the plasmonic film.