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Thermally controlled femtosecond pulse shaping using metasurface based optical filters

Rahimi, Eesa and Şendur, Kürşat (2018) Thermally controlled femtosecond pulse shaping using metasurface based optical filters. Nanophotonics, 7 (3). pp. 659-668. ISSN 2192-8606 (Print) 2192-8614 (Online)

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Official URL: http://dx.doi.org/10.1515/nanoph-2017-0089

Abstract

Shaping of the temporal distribution of the ultrashort pulses, compensation of pulse deformations due to phase shift in transmission and amplification are of interest in various optical applications. To address these problems, in this study, we have demonstrated an ultra-thin reconfigurable localized surface plasmon (LSP) band-stop optical filter driven by insulator-metal phase transition of vanadium dioxide. A Joule heating mechanism is proposed to control the thermal phase transition of the material. The resulting permittivity variation of vanadium dioxide tailors spectral response of the transmitted pulse from the stack. Depending on how the pulse's spectrum is located with respect to the resonance of the band-stop filter, the thin film stack can dynamically compress/expand the output pulse span up to 20% or shift its phase up to 360 degrees. Multi-stacked filters have shown the ability to dynamically compensate input carrier frequency shifts and pulse span variations besides their higher span expansion rates.

Item Type:Article
Uncontrolled Keywords:optical pulse shaping; localized surface plasmons; reconfigurable optical filter; vanadium dioxide phase transition; Joule heating
Subjects:UNSPECIFIED
ID Code:34264
Deposited By:Kürşat Şendur
Deposited On:29 Mar 2018 12:26
Last Modified:29 Mar 2018 12:26

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