We calculate the dispersion relations for electromagnetic waves propagating at the interface between two dissimilar Drude metals in an external magnetic field B parallel to the interface. The propagating modes are bound to the interface and travel perpendicular to B. In certain frequency ranges, the waves can propagate in one direction only. The frequency range for these one-way modes increases with increasing B. One group of modes occurs at moderate frequencies, between the lower and upper plasma frequencies of the two metals. The other occurs at much lower frequencies, between their lower and upper cyclotron frequencies. We discuss possible ways to realize such modes in real materials, including dissimilar superconductors.
REFERENCES
1.
T. F.
Krauss
, Phys. Status Solidi A
197
, 688
(2003
).2.
Z.
Yu
, G.
Veronis
, Z.
Wang
, and S.
Fan
, Phys. Rev. Lett.
100
, 023902
(2008
).3.
M. L.
Povinelli
, S. G.
Johnson
, E.
Lidorikis
, J. D.
Joannopoulos
, and M.
Soljacic
, Appl. Phys. Lett.
84
, 3639
(2004
).4.
F. D. M.
Haldane
and S.
Raghu
, Phys. Rev. Lett.
100
, 013904
(2008
).5.
Z.
Wang
, Y. D.
Chong
, J. D.
Joannopoulos
, and M.
Soljacic
, Phys. Rev. Lett.
100
, 013905
(2008
).6.
7.
W.
Qiu
, Z.
Wang
, and M.
Soljačić
, Opt. Express
19
(22
), 22248
(2011
).8.
9.
D. C.
Mattis
and J.
Bardeen
, Phys. Rev.
111
, 412
(1958
).10.
M.
Tinkham
, Introduction to Superconductivity
, 2nd ed. (Dover Books
, Mineola, New York
, 1996
), p. 87
.© 2014 AIP Publishing LLC.
2014
AIP Publishing LLC
You do not currently have access to this content.
