Plasmons in strong superconductors

Transverse Optical Plasmons in Layered Superconductors.

We discuss the possible existance of transverse optical plasma modes in superlattices consisting of Josephson coupled superconducting layers. These modes appear as resonances in the current-current correlation function, as opposed to the usual plasmons which are poles in the density-density channel. We consider both bilayer superlattices, and single layer lattices with a spread of interlayer Jo...

Pair breaking in strong-coupling superconductors

Renormalization-group approach to strong-coupled superconductors

We develop an asymptotically exact renormalization-group approach that treats electron-electron and electron-phonon interactions on an equal footing. The approach allows an unbiased study of the instabilities of Fermi liquids without the assumption of a broken symmetry. We apply our method to the problem of strongly coupled superconductors and find the temperature T* below which the high-temper...

Strong coupling between mid-infrared localized plasmons and phonons.

We numerically and experimentally demonstrate strong coupling between the mid-infrared localized surface plasmon resonances supported by plasmonic metamaterials and the phonon vibrational resonances of polymethyl methacrylate (PMMA) molecules. The plasmonic resonances are tuned across the phonon resonance of PMMA molecules at 52 THz to observe the strong coupling, which manifests itself as an a...

Strong coupling of single emitters to surface plasmons

D. E. Chang,1 A. S. Sørensen,2 P. R. Hemmer,1,3 and M. D. Lukin1,4 1Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA 2Niels Bohr Institute, DK-2100 Copenhagen Ø, Denmark 3Electrical Engineering Department, Texas A&M University, College Station, Texas 77843, USA 4Harvard-Smithsonian Center for Astrophysics, ITAMP, Cambridge, Massachusetts 02138, USA Received 24 March 2...