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Electromagnetic saturation of angstrom-sized quantum barriers at terahertz frequencies
Cited 62 time in
Web of Science
Cited 66 time in Scopus
- Authors
- Issue Date
- 2015-09
- Publisher
- American Physical Society
- Citation
- Physical Review Letters, Vol.115 No.12, p. 125501
- Abstract
- Metal-graphene-metal hybrid structures allow angstrom-scale van derWaals gaps, across which electron tunneling occurs. We squeeze terahertz electromagnetic waves through these lambda/10000000 gaps, accompanied by giant field enhancements. Unprecedented transmission reduction of 97% is achieved with the transient voltage across the gap saturating at 5 V. Electron tunneling facilitated by the transient electric field strongly modifies the gap index, starting a self-limiting process related to the barrier height. Our work enables greater interplay between classical optics and quantum tunneling, and provides optical indices to the van der Waals gaps.
- ISSN
- 0031-9007
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