Demonstration of Quadrature-Squeezed Surface Plasmons in a Gold Waveguide

Alexander Huck, Technical University of Denmark
Stephan Smolka, Technical University of Denmark
Peter Lodahl, Technical University of Denmark
Anders S. Sorensen, Niels Bohr Institute
Alexandra Boltasseva, Birck Nanotechnology Center, Purdue University
Jiri Janousek, Technical University of Denmark
Ulrik Andersen, Technical University of Denmark

Abstract

We report on the efficient generation, propagation, and reemission of squeezed long-range surface-plasmon polaritons in a gold waveguide. Squeezed light is used to excite the nonclassical surface-plasmon polaritons, and the reemitted quantum state is fully characterized by complete quantum tomographic reconstruction of the density matrix. We find that the plasmon-assisted transmission of nonclassical light in metallic waveguides can be described by a beam splitter relation. This result is explained theoretically.

Discipline(s)

Nanoscience and Nanotechnology