نتایج جستجو برای: photopolymer

تعداد نتایج: 555  

Journal: :Photonics Research 2022

The integration of nano-emitters into plasmonic devices with spatial control and nanometer precision has become a great challenge. In this paper, we report on the use smart polymer to selectively immobilize specific preselected sites gold nanocubes (GNCs). cunning is twofold. First, it records both selected site future emitters–GNC distance through plasmon-assisted photopolymerization. Second, ...

2017
Po-Lin Chen Sheng-Lung Cho June-Hua Lin Shiuan-Huei Lin Ken Y. Hsu Sien Chi

Two-wavelength holographic recording in thick phenanthrenequinone-doped poly(methyl methacrylate) photopolymer is demonstrated. By using 325 nm laser as a gating illumination during the holographic recording with 647 nm laser, a volume hologram with diffraction efficiency of ∼4% can be recorded in a 2 mm thick sample. In addition, the Bragg selectivity curve with clear sinc nulls is demonstrate...

Journal: :Optics express 2003
C Neipp A Beléndez J Sheridan J Kelly F O'Neill S Gallego M Ortuño I Pascual

The nonlocal diffusion model proposed by Sheridan and coworkers has provided a useful interpretation of the nature of grating formation inside photopolymer materials. This model accounts for some important experimental facts, such as the cut-off of diffraction efficiency for high spatial frequencies. In this article we examine the predictions of the model in the case of a general dependence of ...

2012
Michael Statt Christophe Dorrer Kenneth L. Marshall

Radially polarizing liquid crystal (LC) devices aligned optically were investigated for applications in laser technology. Presently, radially polarized beams are generated through complex laser resonator configurations or buffing of LC alignment layers. Optically aligned LC devices offer several advantages over these methods, including their simple fabrication, low cost, high laser damage thres...

2012
Manuel Ortuño Sergi Gallego Andrés Márquez Cristian Neipp Inmaculada Pascual Augusto Beléndez

Photopolymers have proved to be useful for different holographic applications such as holographic data storage or holographic optical elements. However, most photopolymers have certain undesirable features, such as the toxicity of some of their components or their low environmental compatibility. For this reason, the Holography and Optical Processing Group at the University of Alicante develope...

Journal: :Optics letters 2008
Nitesh Pandey Izabela Naydenova Suzanne Martin Vincent Toal

A method has been developed for retrieving the complete angular selectivity profile of transmission holographic gratings in one step. The method is applied to study in real time the shrinkage and changes in the effective optical thickness of a slanted holographic grating recorded in an acrylamide-based photopolymer. It can form the basis of a holographic sensor of analytes that cause a thicknes...

Journal: :Applied optics 1996
Y Kawata R Juškaitis T Tanaka T Wilson S Kawata

A transmission differential phase-contrast microscope with a split detector is used as a readout system for a multilayered three-dimensional optical memory. The system is applicable to data recorded as refractive-index changes. The system is compact and easy to use. The three-dimensional optical transfer function for the system is derived. This shows that the spatial bandwidth of the system is ...

2004
Chunhe Zhao Jian Liu Zhenhai Fu Ray T. Chen

The film shrinkage effect of photopolymeric phase media failed to provide the desired volume holograms for point-to-point optical interconnects. In this paper, we report a new compensation method to physically correct the shrinkage effect resulted from the holographic recording and the post baking. Dupont photopolymer HRF-600X001 is studied. The correction of the Bragg diffraction angle shift o...

Journal: :Optics letters 2008
Chunfang Ye Robert R McLeod

We introduce a new method to make gradient index (GRIN) lenses and GRIN lens arrays by exposing diffusion-driven photopolymers using a low-power CW laser. By changing the size and power of the laser beam and the exposure time the index profile of the GRIN lens can be controlled. Combined with the self-developing nature of the photopolymer, this enables rapid "on-demand" printing of arbitrary mi...

Journal: :Optics letters 1999
L Dhar A Hale H E Katz M Schilling M G Schnoes F C Schilling

A general strategy for fabricating thick, optically flat photopolymer recording media with high dynamic range (M/#) that exhibit low levels of recording-induced Bragg detuning for holographic data storage is presented. In particular, media with M/# values as high as 42 in 1-mm-thick formats are obtained. We believe that these results are the first demonstration of a holographic storage medium w...

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