Multiple patterning of holographic photopolymers for increased refractive index contrast

Photopolymers for Use as Holographic Media

Impact of inhibitor diffusion in holographic photopolymers

Holographic photopolymers develop permanent index change via the polymerization and subsequent diffusion of monomer. It is well-known that to achieve high-fidelity recording, the rate of polymerization must be small in comparison to the rate of diffusion, particularly for strong exposures that consume significant fractions of the available monomer. When this condition is violated, polymerizatio...

Holographic recording in acrylamide photopolymers: thickness limitations.

Holographic recording in thick photopolymer layers is important for application in holographic data storage, volume holographic filters, and correlators. Here, we studied the characteristics of acrylamide-based photopolymer layers ranging in thickness from 250 microm to 1 mm. For each thickness, samples with three different values of absorbance were studied. By measuring the diffraction efficie...

3D micro-optic circuits in holographic photopolymers

Three-dimensional direct-write lithography into diffusion-mediated photopolymers developed for holography is shown to create 10 micron single-mode waveguides. We demonstrate low-loss waveguides, 90 degree bends off of encapsulated mirrors and fabrication of waveguides to embedded fibers. ©2007 Optical Society of America OCIS codes: (160.5470) Polymers, (160.2900) Holographic recording materials...

Cell refractive index tomography by digital holographic microscopy.

For what we believe to be the first time, digital holographic microscopy is applied to perform optical diffraction tomography of a pollen grain. Transmission phase images with nanometric axial accuracy are numerically reconstructed from holograms acquired for different orientations of the rotating sample; then the three-dimensional refractive index spatial distribution is computed by inverse ra...