Nanotech 2008 Vol. 3
Nanotech 2008 Vol. 3
Nanotechnology 2008: Microsystems, Photonics, Sensors, Fluidics, Modeling, and Simulation - Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, Volume 3

Photonics & Nanowires Chapter 1

Passive Light Power Control Enbaled by Nanotechnology

Authors: A. Donval, B. Nemet, R. Shvartzer, M. Oron

Affilation: KiloLambda Technologies Ltd, Israel

Pages: 17 - 21

Keywords: nanotechnology, optical power control, limiting, blocking, protection filter

The need to regulate and control light power is relevant not only for sophisticated communication systems but also to everyday optical equipment such as cameras or car rear-view mirror and require an active electronic feedback control. We explore the unique capabilities and advantages of nanotechnology in developing next generation non-linear components and devices to control and regulate optical power in a passive way to reduce complexity and cost. The design of artificial nanostructured materials for the use in non-linear optical devices is very challenging as it involves the need to incorporate the nanoparticles, nanomaterials and quantum physics equations. We are taking advantage of the unique capabilities of nanoparticles guest embedded within dielectric host matrices for field enhancement effect in developing a whole family of passive Optical Power Control (OPC) components and solutions [ , , ]. We report specifically on the Dynamic Sunlight Filter (DSF), which can be used for light control against blooming of morning sun or headlights of approaching car facing the rear-view window. The DSF is highly transparent at low incident light power. As the light level is increased, the transmission decreases accordingly in a selective way and is limited only to the intense light areas in the image. This process is reversible and the filter returns to its transparent state once the intensity of light decreases to its normal level. We present our nanotechnology power control mechanisms as well as a preliminary design of the DSF. We demonstrate power control and regulation in prototype configuration for several device approaches. Finally, we discuss DSF possible applications, our wish list includes, among others, enjoying a cooler room in a sunny summer day by automatically darkening the window to a predefined level, thus passing less heat and resulting in energy saving

ISBN: 978-1-4200-8505-1
Pages: 940
Hardcopy: $159.95

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