Broadband Nonreciprocal Amplification in Luminal Metamaterials

Autor:	Galiffi, E., Huidobro, P. A., Pendry, J. B.
Rok vydání:	2019
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Physics - Applied Physics Physics - Optics
Zdroj:	Phys. Rev. Lett. 123, 206101 (2019)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.123.206101
Popis:	Time has emerged as a new degree of freedom for metamaterials, promising new pathways in wave control. However, electromagnetism suffers from limitations in the modulation speed of material parameters. Here we argue that these limitations can be circumvented by introducing a traveling-wave refractive index modulation, with the same phase velocity of the waves. We show how the concept of "luminal grating" can yield giant nonreciprocity, achieve efficient one-way amplification, pulse compression and frequency up-conversion, proposing a realistic implementation in double-layer graphene. Comment: 6 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1907.08421 Zobrazit plný text záznamu View this record from Arxiv