Light Assisted Electro-Metallization in Resistive Switch With Optical Accessibility

An optically assisted electrically writable non-volatile nanophotonic resistive switch based on silicon is proposed with an optical readout capability. The proposed scheme also address the issue of undesired current overshoot in resistive switches. Optical assistance is provided with the blue pump l...

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Bibliographic Details
Published in:Journal of lightwave technology 2021-09, Vol.39 (18), p.5869-5874
Main Authors: Singh, Lalit, Sulabh, Kaushik, Vishal, Rajput, Swati, Mishra, Rahul Dev, Kumar, Mukesh
Format: Article
Language:English
Subjects:
Current carriers
Electrodes
High resistance
integrated photonics
Ions
Low resistance
Metallizing
Metals
Nanophotonic resistive switch
Optical devices
Optical imaging
Optical pumping
Optical switches
Optical switching
plasmonic waveguide
Silicon
Switches
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Summary:An optically assisted electrically writable non-volatile nanophotonic resistive switch based on silicon is proposed with an optical readout capability. The proposed scheme also address the issue of undesired current overshoot in resistive switches. Optical assistance is provided with the blue pump light which leads to the photogenrated charge carriers in the active TiO_{2} layer to lower the set voltage and to improve the endurance of the device. A large hysteresis of the current loop in presence of a blue wavelength of light at lower voltages is observed with the proposed three-layered device of Ag/TiO_{2}/p-Si. The electrical resistive state of the device is readout at 1550-nm of wavelength with an optical extinction ratio of 16 dB for 1 mm long device. The optical guidance with the formation (low resistance state) and dissolution (high resistance state) of conductive path filament in the active layer of TiO_{2} is also discussed. The proposed nanophotonic functionality can be useful in realizing ultra-compact on-chip devices for optical switching, modulation and neuromorphic computing.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2021.3091970