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:: Conference on Optics and Photonics ::
 

 

 

:: Latest Published Issue: Volume 23, Number 9 (2017/3) ::
:: Accurate optical surface profilometry ::
Accurate optical surface profilometry
Quang Duc Pham and Yoshio Hayasaki
A new method uses an ultra-stable mode-locked femtosecond laser, a single-pixel camera, and the compressive sensing technique to measure objects with depths of several centimeters.
AWT IMAGEMeasuring the surface profile of objects with large depth is becoming important in several industrial applications (e.g., car manufacturing). Surface profilometers can be used to determine the profile of an object by simply measuring the distance between a reference and sample points on the object. The accuracy of such measurements, however, is limited by the stability of the mechanical parts in the instrument.
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:: Photon up-converting devices for solar fuels ::
Photon up-converting devices for solar fuels
Karl Börjesson, Damir Dzebo, Bo Albinsson and Kasper Moth-Poulsen
Employing a molecular solution capable of triplet-triplet annihilation in a layered microfluidic device enables the solar spectrum to be locally modified toward the UV, increasing solar energy system efficiency.
AWT IMAGESolar power production and solar energy storage are important technologies on the road toward obtaining a sustainable society, independent of access to fossil fuels. To achieve this goal, challenges must be overcome regarding intermittency (the inherent changeability in the supply of solar energy) and load leveling (the variability in consumer demand for electricity). As a consequence, technologies for solar energy storage in the form of latent electrical power (voltaics) and energy-rich chemical bonds (solar fuels) are becoming increasingly important.
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:: Efficient nanoparticle synthesis ::
Efficient nanoparticle synthesis
Dorota Koziej
Integrating a microwave reactor with a microfluidic platform reduces the synthesis time of nanoparticles to 64ms.
AWT IMAGENanoparticles are essential building blocks for many energy-related applications, ranging from lithium ion batteries, catalysis, and photocatalysis to electrochromic windows. The ability to synthesize nanoparticles with well-defined size, shape, and structure is critically important. In recent years, there have been two main trends to improve the efficiency of nanoparticle synthesis by use of microwave or microfluidic reactors.1, 2 Microwave reactors provide a higher nanoparticle yield in shorter reaction times than conventional batch reactors,1 and microfluidic reactors have the separate advantage that reaction conditions, such as heat and mass transfer rates, can be independently controlled for small volumes of reaction solution.2 Integrating such miniaturized reactors with microwave heaters would combine the advantages of both and so improve nanoparticle synthesis.

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:: Dual-function graphene-based electronic devices ::
 | Post date: 2014/04/19 | 
Dual-function graphene-based electronic devices
AWT IMAGEGraphene/poly(vinylidene fluoride-co-trifluoroethylene) multilayer films enable the fabrication of transparent, flexible nanogenerators and acoustic devices.
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:: Domesticating random lasers ::
 | Post date: 2014/04/19 | 
Domesticating random lasers
AWT IMAGEWhen pumped with a spatially modulated light beam, random lasers can be tuned to emit into specific, predetermined directions.

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