Photonics materials - 4Virtual room: CMC - 1
|Thursday, May 28|
PM-4-28-1 / III-As nanowires grown by HVPE for photonic applications
* Gabin Gregoire, Institut Pascal, France
The growth of InAs and GaAs nanowires by Hydride Vapor Phase Epitaxy is studied (HVPE). HVPE is well known for the control of nanostructures morphologies which is a key point for futur infrared photonics devices.
PM-4-28-2 / Photocontrollable liquid crystalline hybrid composites for photonics
* Alexey Bobrovsky, Chemistry Department of Moscow State University, Russian Federation
Valery Shibaev, Chemistry Department of Moscow State University
New types of hybrid liquid crystalline composites based on organic and inorganic matrices were elaborated and their unique photooptical properties were demonstrated.
PM-4-28-3 / Liquid crystals bring agility to solid state lighting
* Vladimir Presniakov, LensVector, Canada
Armen Zohrabyan, LensVector
Simon Careau, LensVector
Aram Bagramyan, LensVector
Tigran Galstian, LensVector
We shall describe our work on the development of liquid crystal components for the manipulation of light. Particular attention will be devoted to the case of light emitting diode enabled solid state lighting systems. Dynamic beam shaping cases will be described and discussed.
PM-4-28-4 / Highly absorbing carbon nanotube based coatings for optical and infrared applications
* David Carnahan, NanoLab, Inc., United States
Thomas Morgan, NanoLab, Inc.
In optical and infrared systems, the control of stray light is essential to achieving high contrast. Carbon nanotube based coatings are becoming the state of the art choice for stray light control. Vertically aligned carbon nanotube arrays (VANTA) are the world’s blackest, most highly absorbing materials. However, at grazing angles, they suffer from higher reflection coefficients, due to their anisotropy, making them poorly suited for applications where grazing angle incidence is expected. Further, VANTA coatings are synthesized at high temperatures, limiting the materials that can be used. To address this and other issues, NanoLab has researched and developed highly absorbing carbon nanotube loaded paints, (now marketed as Singularity Black) to create a more randomized structure with high optical and infrared absorption that has better grazing angle performance. This paint can be spray-applied to large areas, on lower temperature substrates, and at lower cost. This paper describes the structures necessary for highly absorbing black coatings, and reviews the approach and data collected for two products, Singularity Black paint and NanoLab’s version of vertically aligned nanotube coatings, adVANTA.
PM-4-28-5 / Modified Tip-enhanced Raman spectroscopy to detect a monolayer of Reverse Micelles
* Ramis Arbi, McMaster University, Canada
Lok Shu Hui, McMaster University
A modified set-up for tip-enhanced Raman spectroscopy is proposed to extend conventional tip-enhanced Raman spectroscopy, beyond the dependence on near field optics. The mechanisms for enhancement have been proposed through comparisons to spectra from other enhanced Raman techniques. This technique allows for the characterization of a monolayer of PS-b-P2VP reverse micelles and paves a way for a promising technique in the characterization of self- assembled arrays of nanoparticles.
PM-4-28-6 / Photonic properties of siliceous micro-organisms and what we can learn from them
* Mark Andrews, McGill University, Canada