Demonstration of Quadrature Squeezed Surface-Plasmons in a Gold Waveguide
Alexander Huck, Stephan Smolka, Peter Lodahl, Anders S. Soerensen,, Alexandra Boltasseva, Jiri Janousek, and Ulrik L. Andersen
TL;DR
This paper demonstrates the generation and propagation of quadrature squeezed surface-plasmon polaritons in a gold waveguide, with full quantum characterization confirming non-classical light transmission in plasmonic structures.
Contribution
It presents the first experimental realization of quadrature squeezed SPPs in a gold waveguide with complete quantum state tomography.
Findings
Successful generation and re-emission of squeezed SPPs
Quantum state tomography confirms non-classical properties
Plasmon-assisted transmission modeled as a beam splitter
Abstract
We report on the efficient generation, propagation, and re-emission of squeezed long-range surface-plasmon polaritons (SPPs) in a gold waveguide. Squeezed light is used to excite the non-classical SPPs and the re-emitted quantum state is fully quantum characterized by complete tomographic reconstruction of the density matrix. We find that the plasmon-assisted transmission of non-classical light in metallic waveguides can be described by a Hamiltonian analogue to a beam splitter. This result is explained theoretically.
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