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"The interactions between quantum states of light and nanoscale metamaterials"

Dr. Charles Altuzarra
Nanyang Technological University, Singapore


Fabrication of structures on the nanometer scale and their interactions with light has gained increasing amounts of interest in the past several years. Nanostructures have come in all flavors: some that resonate at specific wavelengths of light, some that rotate the polarization (namely chiral structures), others that have holographic properties. Specific structures have been known to mimic functionalities of bulk optical components, for instance classical light can be focused past the diffraction limit by being transmitted through flat lenses: slit nanostructures that induce "super-oscillation". Furthermore, ultra-thin plasmonic metamaterials have the ability to coherently absorb light into plasmons.

It has already been shown that plasmons conserve the quantum state of entangled photons through an array of holes milled in a gold thin film. Is it safe to assume that all nanostructures are viable in the quantum regime? or will we occasionally observe changes in the behavior of quantum states of light.

Here, I will be discussing our recent results from three experiments: 1) heralded single photons focused by the virtue of a superoscillation flat lens [1], 2) Single photons coherently absorbed by a plasmonic metamaterial [2] and 3) Nonlocal 'control' of plasmonic coherent perfect absorption (CPA) observed with polarization entangled photon pairs (type II SPDC). The results give insights on studying properties of nanostructured materials of plasmonic and non-plasmonic characteristics with quantum states light. Moreover, they show that complex fabrication schemes can be integrated for tailored 'light-matter' interactions.

[1] Light: Sci. & Appl. 5, e16127(2016). [2] Nat. commun. 6:7031 (2016)

Tuesday, September 27, 2016
IQSE 578, 12:30 Noon
Mitchell Physics Building

Institute for Quantum Science and Engineering
Texas A&M University

(Sandwiches, chips, and water to be served at 12:00 noon)

Host: Girish Agarwal