Abstract
A photonic switch is an integral part of optical telecommunication systems. A plasmonic bandpass filter integrated with materials exhibiting phase transition can be used as a thermally reconfigurable optical switch. This paper presents the design and demonstration of a broadband photonic switch based on an aluminium nanohole array on quartz utilising the semiconductor-to-metal phase transition of vanadium dioxide. The fabricated switch shows an operating range over 650 nm around the optical communication C, L, and U band with maximum 20%, 23% and 26% transmission difference in switching in the C band, L band, and U band, respectively. The extinction ratio is around 5 dB in the entire operation range. This architecture is a precursor for developing micron-size photonic switches and ultra-compact modulators for thin film photonics.
Highlights
Plasmonics offers an attractive platform to bridge the size mismatch between optical devices and electronics, and enable compact integration of these devices on a single chip[11]
Plasmonic wavelength filters based on perforated metallic film integrated with suitable materials exhibiting phase transition can be used as a thermally reconfigurable photonic switch operate in submicron scale[24,25]
We present, using both computational and experimental methods, a broadband photonic switch based on a hybrid combination of a hexagonal array of holes and vanadium oxide
Summary
Miao Sun 1, Mohammad Taha[2], Sumeet Walia[2], Madhu Bhaskaran[2], Sharath Sriram[2], William Shieh1 & Ranjith Rajasekharan Unnithan[1]. Plasmonic wavelength filters based on perforated metallic film integrated with suitable materials exhibiting phase transition can be used as a thermally reconfigurable photonic switch operate in submicron scale[24,25]. VO2 - Ag and VO2 – Au based thermally-driven optical switches operating near IR region (800 nm to 900 nm) have been demonstrated with 4% and 1.2% transmission respectively using a square arrangement of holes[41] In this manuscript, we present, using both computational and experimental methods, a broadband photonic switch based on a hybrid combination of a hexagonal array of holes and vanadium oxide. It is for the first time that such a combination of the hexagonal array with semiconductor-to-metal phase transition of VO2 has been explored for the fabrication of a thermally reconfigurable photonic switch, resulting in such high transmission efficiency in the optical communication range
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