Tunable plasmonic nanocavity with Ge2Sb2Te5 film for directional launching of surface plasmons | Zendy

Hee-Dong Jeong | Zendy; ChiYoung Hwang | Zendy; Hyuntai Kim | Zendy; Muhan Choi | Zendy; SeungYeol Lee | Zendy

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Tunable plasmonic nanocavity with Ge₂Sb₂Te₅ film for directional launching of surface plasmons

Author(s) -

Hee-Dong Jeong,

ChiYoung Hwang,

Hyuntai Kim,

Muhan Choi,

SeungYeol Lee

Publication year - 2018

Publication title -

japanese journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.487

H-Index - 129

eISSN - 1347-4065

pISSN - 0021-4922

DOI - 10.7567/jjap.57.040307

Subject(s) - plasmon , materials science , surface plasmon , optoelectronics , groove (engineering) , optics , extinction ratio , germanium , physics , silicon , wavelength , metallurgy

A tunable plasmonic nanocavity which consists of a metallic groove with submerged ultra-thin Ge2Sb2Te5 film is proposed for controlling the on/off characteristics of directional surface plasmon polaritions (SPPs) launching. Different mechanisms of launching SPPs using two orthogonal incident polarizations are investigated to reveal the SPP generation characteristics from the proposed nanocavity. By choosing the appropriate position of Ge2Sb2Te5 film, we report that the directional launching characteristics of SPPs can be controlled by changing the phase state of extremely small volume of Ge2Sb2Te5 film, which shows up to 37 dB of extinction ratio changing characteristics.

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