Antenna-assisted picosecond control of nanoscale phase transition in vanadium dioxide

Light, Science & Applications
Otto L MuskensJavier Aizpurua

Abstract

Nanoscale devices in which the interaction with light can be configured using external control signals hold great interest for next-generation optoelectronic circuits. Materials exhibiting a structural or electronic phase transition offer a large modulation contrast with multi-level optical switching and memory functionalities. In addition, plasmonic nanoantennas can provide an efficient enhancement mechanism for both the optically induced excitation and the readout of materials strategically positioned in their local environment. Here, we demonstrate picosecond all-optical switching of the local phase transition in plasmonic antenna-vanadium dioxide (VO2) hybrids, exploiting strong resonant field enhancement and selective optical pumping in plasmonic hotspots. Polarization- and wavelength-dependent pump-probe spectroscopy of multifrequency crossed antenna arrays shows that nanoscale optical switching in plasmonic hotspots does not affect neighboring antennas placed within 100 nm of the excited antennas. The antenna-assisted pumping mechanism is confirmed by numerical model calculations of the resonant, antenna-mediated local heating on a picosecond time scale. The hybrid, nanoscale excitation mechanism results in 20 times redu...Continue Reading

References

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Citations

Dec 12, 2017·Advanced Materials·Kaichen DongJunqiao Wu
May 28, 2019·Scientific Reports·Arunas JagminasGintaras Valušis
Jul 25, 2018·Scientific Reports·Miao SunRanjith Rajasekharan Unnithan
Dec 13, 2017·Nanotechnology·Hongwei LiuXiao Renshaw Wang
Nov 2, 2019·Applied Optics·Maryam ZahedianBogdan Dragnea
Oct 22, 2020·Light, Science & Applications·Jianyu ZhangKostya S Novoselov
Oct 30, 2020·Optics Express·Sarvenaz MemarzadehJeremy N Munday
Apr 7, 2021·Optics Express·Lei KangDouglas H Werner

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Methods Mentioned

BETA
2
2 hybrid
2 hybrids

Software Mentioned

COMSOL
Multiphysics

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