ELFT HÍRADÓ

[mcsete AT physx.u-szeged.hu]

Meghívó

SZTE TTIK Fizikus Tanszékcsoport Szemináriuma

Előadó: Professor Vasily N. Astratov,
Department of Physics and Optical Science
University of North Carolina at Charlotte

Cím:
Microspherical Photonics:
Optical Super-Resolution and Resonant Propulsion Effects

Időpont: 2015. július 10, 11 h

Helyszín: SZTE TTIK, Budó Ágoston tanterem, Szeged, Dóm tér 9


Abstract:
Emerging microspherical photonics is based on two recently observed  
effects in the optical properties of dielectric microspheres -  
super-resolution imaging and resonant propulsion. The physical  
mechanisms of optical super-resolution are debated in the literature  
and can involve excitation of plasmon resonances in nanostructured  
metallic objects coupled to microspherical dielectric antennas. We  
developed a methodology of experimental definition of super-resolution  
and demonstrated ~lambda/7 resolution of nanoplasmonic arrays [1]. We  
observed a resonant enhancement of the optical forces exerted on  
microspheres in evanescent fiber couplers. It is shown that the  
magnitude of the optical forces is determined by almost complete light  
momentum transfer to microspheres under resonance with their  
whispering gallery modes [2]. This can lead to sorting of spherical  
photonic atoms with identical resonant properties for a variety of  
applications [3].

[1] A. Darafsheh, N.I. Limberopoulos, J.S. Derov, D.E. Walker, Jr.,  
and V.N. Astratov, APL 104, 061117 (2014)
[2] Y. Li, A.V. Maslov, N.I. Limberopoulos, A.M. Urbas, and V.N.  
Astratov, Laser & Phot. Rev. 9, 263 (2015).
[3] A.V. Maslov and V.N. Astratov, APL 105, 121113 (2014).


Minden erdeklődőt szeretettel várunk.

Dr. Csete Mária
szeminarium-koordinator

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