Journal
ADVANCED MATERIALS
Volume 30, Issue 29, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201801257
Keywords
dual-channel switching; high-temperature superconductors; terahertz metamaterials; ultrafast dynamics; YBCO
Categories
Funding
- Singapore Ministry of Education [MOE2015-T2-2-103, MOE2016-T3-1-006(S)]
- Singapore National Research Foundation (NRF)
- French National Research Agency (ANR) [NRF2016-NRF-ANR004]
- UK Engineering and Physical Sciences Research Council [EP/M009122/1]
- EPSRC [EP/M009122/1] Funding Source: UKRI
Ask authors/readers for more resources
The mechanism of Cooper pair formation and its underlying physics has long occupied the investigation into high temperature (high-T-c) 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-T-c 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available