Photonics materials - 2Virtual room: Optonique - 3
|Tuesday, May 26|
PM-2-26-1 / Coupling Nonlinear Optical Dynamics to Polymer Systems for Light-Directed Organization of Functional Materials
* Ian Dean Hosein, Syracuse University, Canada
Coupling polymeric systems to nonlinear dynamics offers opportunities to create materials with tailored morphology and functionality via pattern forming processes. Examples include periodic striations from traveling fronts in thermal polymerization, coalescence of polymer films during dewetting, oscillatory gels, and phase separation. Here, we present a fundamentally new mechanism to organize polymeric materials that couples photopolymerization to the nonlinear dynamics of optical fields. In a new process of optical auto-acceleration, a positive feedback mechanism emerges between photopolymerization and transmitted light intensity, whereby a mutual, dynamic interaction emerges between optical field distribution and the underlying morphology of the polymer medium. The input light undergoes Modulation Instability – dividing into a multitude of microscale “self-trapped” beams, which are nonlinear waveforms characterized by divergence-free propagation. As a result, these nonlinear waveforms inscribe permanent microstructure consisting of microscopic “channels” in the polymer. This coupling between optical nonlinearity and morphology evolution will be demonstrated in polyfunctional acrylate systems, polymer blends, as well as polymer-solvent mixtures. As a demonstration of the potential of this new process and the material properties, their application towards creating light-collecting encapsulants for solar cells will be discussed. Harnessing nonlinear optical pattern formation to direct the organization of polymeric materials opens opportunities for studying interesting nonlinear systems, while creating advanced microstructures that can serve functional roles in a broad range of applications.
PM-2-26-2 / WAVEGUIDE ENCODED LATTICES (WELS) : POLYMER FILMS WITH ENHANCED FIELDS OF VIEW INSPIRED BY ARTHROPODAL COMPOUND EYES
* Kathryn Benincasa, McMaster University, Canada
Cecile Fradin, McMaster University
Kalaichelvi Saravanamuttu, McMaster University
In this presentation, we will describe a family of 2 to 3 mm thick, polymer films inscribed with WELs that – like compound eyes – have a greatly enhanced panoramic field of view (FOV) but also possess properties that are impossible or extremely challenging to achieve in natural or artificial compound eyes. WELs transmit, focus and invert images without the need for bulky optics and conversely, precisely control the shape and trajectory of light beams.
PM-2-26-3 / Designing Computing-Inspired Functions in Materials Using a Nonlinear Optical Response
* Fariha Mahmood, McMaster University, Canada
Alexander Hudson, McMaster University
Matthew Ponte, McMaster University
Thomas Pena Ventura, McMaster University
Amos Meeks, Harvard University
Ankita Shastri, Harvard University
Andy Tran, McMaster University
Anna Shneidman, Harvard University
Victor Yashin, University of Pittsburgh
Anna Balazs, University of Pittsburgh
Joanna Aizenberg, Harvard University
Kalaichelvi Saravanamuttu, McMaster University
Stimuli-responsive materials that compute represent a new way of using the diverse capabilities of polymeric systems – exploiting chemical changes to create functional structures that receive, process, and respond to information that enters the system in the form of a stimulus. Herein, we present two polymer-based materials with a nonlinear optical response – namely, a light-induced increase in refractive index – and describe how these responses can form the basis of computing-inspired functions. The first system, a photopolymerizable cuboid, performs three computing operations: data recognition and transfer; volumetric encoding, and binary arithmetic. Binary data, input in the form of three broad, mutually orthogonal beams of white light patterned with light (1) and dark (0) stripes, elicits the formation of up to three populations of filaments or waveguides within volume subdivisions (voxels) of the cuboid. Spontaneous self-organization of orthogonal waveguide populations yields ordered configurations that may be read at the sample output to perform operations. The second system, a hydrogel functionalized with photoisomerizable merocyanine moieties, shows reversible self-trapping of incoming laser light. When multiple beams of light propagate through the material, the crosslinked nature of the gel allows them to interact and exert influence over their neighbours’ behaviour at long ranges. These interactions may form the basis of other computing-inspired functions.
PM-2-26-5 / Towards Ultra-Thin Monolithic Imaging Systems
* Michael DelMastro, University of Ottawa, Canada
Orad Reshef, University of Ottawa
Katherine Bearne, University of Ottawa
Ali Alhulaymi, University of Ottawa
Lambert Giner, National Research Council of Canada
Robert Boyd, University of Ottawa
Jeff Lundeen, University of Ottawa
The advancements in metamaterials have resulted in the creation of metalenses, which are significantly thinner than typical lenses and can therefore reduce the length of imaging systems. However, the required propagation distance between these lenses is what causes the sizeable length of most imaging systems. We present a novel optic called a “spaceplate” which reduces the space necessary for light propagation. Three types of spaceplate are defined, two of which have been verified experimentally.
PM-2-26-6 / Prismatic 3D Printing: Seamless Elements from Nonlinear Waves
* Oscar Alejandro Herrera Cortes, McMaster University, Canada
Oscar Alejandro Herrera Cortes, Derek. R. Morim, Natalie Blanchard, Tomas Omasta and Kalaichelvi Saravanamuttu* Department of Chemistry and Chemical Biology McMaster University Hamilton, Canada Keywords: Prismatic 3D printing, nonlinear waves, self-trapping, electroactive waveguides. Prismatic 3D printing is a volumetric method to create micro- and macroscopic structures by employing patterned nonlinear waves from light emitting diodes (LEDs) elicited when LED beams travel in a photopolymerizable medium1. Refractive index-changes originated by the photopolymerization reaction initiated by light lead to optical self-trapping which allows the beam to retain its shape as it travels through the medium2,3. This technique differs from traditional layer-by-layer 3D printing approaches in that each launched optical pattern inscribes a prismatic element in a single step. The resultant prisms can be combined into a complete object by fusing the prisms together, as a form of post-processing or as part of the printing process. This technique was also extended to overlapping prismatic elements, illustrating our ability to minimize the number of printable elements and increase printing speeds to greater than 100x the speed of conventional stereolithographic printers. These prismatic elements are homogeneous along z and have a higher refractive index compared to their surroundings which give each prismatic element excellent light-guiding properties. Finally, we show how prismatic 3D printing provides is a fast route to fabricate moving electroactive slab hydrogel waveguides and hydrogels prisms patterned with 3-D waveguide circuitry capable of performing complex motions. References  Basker, D. K.; Cortes, O. A. H.; Brook, M. A.; Saravanamuttu, K. 3D Nonlinear Inscription of Complex Microcomponents (3D NSCRIPT): Printing Functional Dielectric and Metallodielectric Polymer Structures with Nonlinear Waves of Blue LED Light. Adv. Mater. Technol. 2017, 2 (5), 1600236–n/a.  Zhang J.; Kasala K.; Rewari A.; Saravanamuttu K. Self-trapping of spatially and temporally incoherent light in a photochemical system, J. Am. Chem. Soc. 2006, 128, 406-407.  Kewitsch, A. S.; Yariv, A. Self-focusing and self-trapping of optical beams upon photopolymerization. OPTICS LETTERS 1996, 21(1), 24-26.
PM-2-26-7 / Enhanced Photoluminescence in Encapsulated TFSI-treated MoS2
* Kurt Tyson, Queen's University, Canada
James Godfrey, Queen's University
James Fraser, Queen's University
Robert Knobel, Queen's University
Poor photoluminescence quantum yield (PLQY) limits the use of monolayer MoS2 for optoelectronic device applications. We demonstrate significantly enhanced photoluminescence (PL) up to an order of magnitude using trifluoromethansulfonimide (TFSI) acid treatment with preservation of this effect via hexagonal boron nitride (hBN) encapsulation.
PM-2-26-8 / Design of a plasmonic antenna hot-electron solar cell
* Rana Poushimin, Queen's University, Canada
This document briefly introduces a new generation of solar cells as the rectenna solar cells which consist of an array of Au nanorods that receive the energy of the sun and generate hot electrons as the decay of surface plasmon polariton. This low-cost plasmonic device is sensitive to polarization and, its efficiency would be above 90%.