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Optical Switching Using Transition From Dipolar To Charge Transfer Plasmon Modes In Ge2sb2te5 Bridged Metallodielectric Dimers, Arash Ahmadivand, Burak Gerislioglu, Raju Sinha, Mustafa Karabiyik, Nezih Pala
Optical Switching Using Transition From Dipolar To Charge Transfer Plasmon Modes In Ge2sb2te5 Bridged Metallodielectric Dimers, Arash Ahmadivand, Burak Gerislioglu, Raju Sinha, Mustafa Karabiyik, Nezih Pala
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Capacitive coupling and direct shuttling of charges in nanoscale plasmonic components across a dielectric spacer and through a conductive junction lead to excitation of significantly different dipolar and charge transfer plasmon (CTP) resonances, respectively. Here, we demonstrate the excitation of dipolar and CTP resonant modes in metallic nanodimers bridged by phase-change material (PCM) sections, material and electrical characteristics of which can be controlled by external stimuli. Ultrafast switching (in the range of a few nanoseconds) between amorphous and crystalline phases of the PCM section (here Ge2Sb2Te5 (GST)) allows for designing a tunable plasmonic switch for optical communication applications with significant …