Session Overview |
Nonlinear Optics, Nanophotonics and Plasmonics - Bloc 6Room: Cartier 2 |
Date: Thursday, June 07 |
15:30 |
Characterization of Optical Polarization Knots
Main Author: Hugo Larocque Organization: University of Ottawa, Canada We experimentally generate optical polarization knots. The topology of these knots is then characterized by reconstructing their Seifert surfaces and computing their genus. |
15:45 |
Weak Measurements of the Dipolar Emitter Polarization State
Main Author: Sergey Nechayev Organization: Max Planck Institute for the Science of Light, Germany Abstract— We investigate polarization singularities (C points) in the far-field of an elliptically polarized dipole. For an almost linear dipole moment, four singularities occur along directions almost aligned with the dipole moment axis - in the null intensity region. Under certain assumptions measuring two of the C points is enough to fully characterize the dipole’s polarization state. We experimentally resolve these C points via weak measurement far-field polarization projection. We propose practical applications for the fundamental study of dipolar emitters in general and position sensing in particular. |
16:00 |
Design and fabrication of novel photonic crystal fiber for supercontinuum generation of OAM beam
Main Author: Manish Sharma Organization: École de technologie supérieure, Canada A novel endlessly monoradial photonic crystal fiber design is proposed to enable the stable transmission of orbital angular momentum (OAM) beams and promote a supercontinuum light vortex source. The modal properties of the proposed fiber are investigated and optimized via finite-element method. The characterization of fabricated fiber samples is also discussed. |
16:15 |
Four-Wave Mixing Theory for Cylindrical Vector Beams in Optical Fibre
Main Author: Scott Goudreau Organization: University of Ottawa, Canada Cylindrical vector beams are a form of structured light where the polarization varies across the transverse profile. We have developed the theory describing four-wave mixing of these beams, which holds potential as a method for generating mode-entangled photons. The four-wave mixing selection rules are developed explicitly for a subset of cylindrical vector modes possessing one unit of orbital angular momentum. |
16:30 |
Limitations to the sensitivity of a three-mode nonlinear interferometer
Main Author: Jefferson Florez Organization: University of Ottawa, Canada We investigate the phase sensitivity of a nonlinear interferometer. Unlike previous analyses, we take into account the quantum features of the pump field. After obtaining the quantum state that describes the pump, signal and idler modes at the interferometer output, we calculate the phase uncertainty by means of the classical Fisher information. We compare this uncertainty with the one predicted in the parametric approximation, which allows us to establish the range of validity for such an approximation. We finally study the minimum phase uncertainty as a function of the input number of pump photons, and find an inverse scaling with this number, which is also known as Heisenberg scaling. |
16:45 |
Tunable field dynamics from a figure-eight laser featuring an on-chip nonlinear waveguide
Main Author: Piotr Roztocki Organization: INRS-EMT, Canada A range of mode-locking dynamics is experimentally demonstrated using a polarization-reconfigurable figure-eight laser architecture, which contains a highly nonlinear on-chip spiral waveguide. |
17:00 |
Realizing on-chip, flat-band photonic crystal superprisms
Main Author: Jeremy Upham Organization: University of Ottawa, Canada By optimizing the dispersion curve of a 2D photonic crystal superprism, not for the largest angular dispersion but instead for constant angular group velocity dispersion over a broad bandwidth, we designed a device capable of experimentally demonstrating linear dispersion from 1500 to 1600 nm with clear separation of as many as 8 channels. |
17:15 |
Imaging based on low-coherence interferometry in the visible spectrum
Main Author: Mikel Bravo Acha Organization: Universite de Sherbrooke, Canada This paper presents a proof of concept based on free space optics for a low-coherence interferometer designed for imaging in the visible spectrum. Based on numerical simulations, a waveguide structure is proposed for single-mode operation over a 550-750 nm bandwidth as a first building block for a future system fully implemented in integrated optics. |
17:30 |
A New Nano-Optical Approach for Nanoimprinting-Stamp Origination Targetting Data Storage
Main Author: Mahssa Abdolahi Organization: Simon Fraser University, Canada In this paper, an optimized nano-optical process for fast, effective, and reliable nanoimprinting, which can be used for implementing data storage or as a stand-alone technique for origination of a stamp, has been proposed. |
17:45 |
Multilayered doped fiber structure for high second harmonic generation
Main Author: Salah Abdullah Organization: Université Laval, Canada Second harmonic generation (SHG) is initially demonstrated in a 16-multilayered germanium (Ge) doped silica fiber structure through a combination of thermal poling and Maker Fringe techniques. This multilayered poled fiber structure has shown a higher SHG intensity peak (1050mV compared to unpolled f and single mode fibers. |
18:00 |
Impurity effects on surface plasmons in graphene
Main Author: Mousa Bahrami Organization: Concordia University , Canada We investigate transverse magnetic (TM) and transverse electric (TE) surface plasmons (SPs) in graphene in the presence of impurity scattering in the Lindhard approximation. We show how the scattering strength alters the behavior and domains of TM SPs and determine its critical value below which no SPs exist. The quality factor of these SPs for intra- and inter-band transitions is proportional to the square of the quantity “fine structure constant times the wavelength divided by the impurity strength”. Further, we show that impurity scattering suppresses TE SPs. |