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Classical analogue of electromagnetically induced transparency with a metal-superconductor hybrid metamaterial

Cihan Kurter ; Philippe Tassin (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Lei Zhang ; Thomas Koschny ; Alexander P. Zhuravel ; Alexey V. Ustinov ; Steven M. Anlage ; Costas M. Soukoulis
Physical Review Letters (0031-9007). Vol. 107 (2011), 4, p. 043901.
[Artikel, refereegranskad vetenskaplig]

Metamaterials are engineered materials composed of small electrical circuits producing novel interactions with electromagnetic waves. Recently, a new class of metamaterials has been created to mimic the behavior of media displaying electromagnetically induced transparency (EIT). Here we introduce a planar EIT metamaterial that creates a very large loss contrast between the dark and radiative resonators by employing a superconducting Nb film in the dark element and a normal-metal Au film in the radiative element. Below the critical temperature of Nb, the resistance contrast opens up a transparency window along with a large enhancement in group delay, enabling a significant slowdown of waves. We further demonstrate precise control of the EIT response through changes in the superfluid density. Such tunable metamaterials may be useful for telecommunication because of their large delay-bandwidth products.

Nyckelord: metamaterial, slow light, superconductor, electromagnetically induced transparency

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Denna post skapades 2013-10-03. Senast ändrad 2013-10-03.
CPL Pubid: 184602


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)


Nanovetenskap och nanoteknik
Optisk fysik
Den kondenserade materiens fysik
Övrig elektroteknik, elektronik och fotonik

Chalmers infrastruktur