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|Title:||A superconducting dual-channel photonic switch||Authors:||Srivastava, Yogesh Kumar
Krishnamoorthy, Harish N. S.
|Keywords:||Science::Physics||Issue Date:||2018||Source:||Srivastava, Y. K., Manjappa, M., Cong, L., Krishnamoorthy, H. N. S., Savinov, V., Pitchappa, P., & Singh, R. (2018). A superconducting dual-channel photonic switch. Advanced Materials, 30(29), 1801257-. doi:10.1002/adma.201801257||Journal:||Advanced Materials||Abstract:||The mechanism of Cooper pair formation and its underlying physics has long occupied the investigation into high temperature (high-Tc ) cuprate superconductors. One of the ways to unravel this is to observe the ultrafast response present in the charge carrier dynamics of a photoexcited specimen. This results in an interesting approach to exploit the dissipation-less dynamic features of superconductors to be utilized for designing high-performance active subwavelength photonic devices with extremely low-loss operation. Here, dual-channel, ultrafast, all-optical switching and modulation between the resistive and the superconducting quantum mechanical phase is experimentally demonstrated. The ultrafast phase switching is demonstrated via modulation of sharp Fano resonance of a high-Tc yttrium barium copper oxide (YBCO) superconducting metamaterial device. Upon photoexcitation by femtosecond light pulses, the ultrasensitive cuprate superconductor undergoes dual dissociation-relaxation dynamics, with restoration of superconductivity within a cycle, and thereby establishes the existence of dual switching windows within a timescale of 80 ps. Pathways are explored to engineer the secondary dissociation channel which provides unprecedented control over the switching speed. Most importantly, the results envision new ways to accomplish low-loss, ultrafast, and ultrasensitive dual-channel switching applications that are inaccessible through conventional metallic and dielectric based metamaterials.||URI:||https://hdl.handle.net/10356/137405||ISSN:||0935-9648||DOI:||10.1002/adma.201801257||DOI (Related Dataset):||https://doi.org/10.21979/N9/L6ILCD||Rights:||This is the peer reviewed version of the following article: Srivastava, Y. K., Manjappa, M., Cong, L., Krishnamoorthy, H. N. S., Savinov, V., Pitchappa, P., & Singh, R. (2018). A superconducting dual-channel photonic switch. Advanced Materials, 30(29), 1801257-., which has been published in final form at [https://doi.org/10.1002/adma.201801257]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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