Nano-apertures and applications II
16:40 Invited talk : Fast modeling of nano-apertures using the hybridizable discontinuous Galerkin method
Ngoc-Cuong Nguyen (1),Jaime Peraire (1),Hyeong-Ryeol Park (2),Xiaoshu Chen (2),Sang-Hyun Oh (2)
(1)MIT (USA) , (2)University of Minnesota (USA) Accurate computational modeling of electromagnetic wave propagation inside nano-aperatures poses some significant challenge. The enormous mismatch in length scales, up to 6 orders of magnitude between millimeter-scale wavelength and nanometer-scale gap size, is beyond the capabilities of currently available finite-difference time-domain or finite-element methods. To solve this problem, we employ the Hybridizable Discontinuous Galerkin method to calculate full 3D field distributions and transmission spectra for nano-aperature structures in a fast and accurate manner.
17:00 Invited talk : Nanostructured plasmonic interferometers for ultrasensitive label-free biosensing
Filbert J. Bartoli
Lehigh University (USA) This presentation will focus on the design, fabrication, and characterization of nanoplasmonic interferometers for label-free biosensing applications.
17:20 : Subwavelength Lattice Optics by Evolutionary Design
Northwestern University (USA) A new class of structured optical materials-lattice opto-materials-that can manipulate the flow of visible light into a wide range of three dimensional profiles using evolutionary design principles will be discussed. Lattice opto-materials based on predicted arrangements of nanoscale holes can exhibit simple properties, such as on- and off-axis focusing, and can also concentrate light into multiple, discrete focal spots. Anisotropic unit cell shapes can achieve polarization-dependent optical responses from the same two-dimensional patterned substrate.
17:35 : Extraordinary light intensity enhancement by hyperfocusing in low Q-factor resonators: the Helmholtz Optical Resonator example.
F. Pardo (1),P. Chevalier (1),P. Bouchon (2),R. Haidar (2),J.-L. Pelouard (1)
(1)MiNaO Laboratory- LPN-CNRS (France) , (2)MiNaO Laboratory-ONERA-DOTA (France) A slit-box combination (the Optical Helmholtz Resonator) permits to observe the nearly total funneling of a transverse magnetic focused beam, even if the slit is arbitrarly narrow. In this hyperfocusing phenomena, the energy concentration corresponds to a giant enhancement of the electric field intensity, up to 10 5 in the near infrared range. I will discuss the applications for photodetection, SERS, SEIRA, and nonlinear optics, and show in a picturial way the building sequence of the field.
17:50 : Listening to a virus with a double-nanohole optical tweezer
Skylar Wheaton, Ryan Gelfand, Reuven Gordon
University of Victoria (Canada) Virus vibrations reveal structural properties, allowing for identification and selecting specific virus particles in solution, and these vibrations can be targeted to destroy specific viruses with a unique excitation frequency spectrum. Using extraordinary acoustic Raman spectroscopy (EARS), we measure the vibrational spectra of individual isolated MS2 virus particles in solution.