Photonics Nanostruct 2015 Aug;16:24-33
University of Puerto Rico, Rio Piedras Campus, PO Box 23343, San Juan, PR 00931-3343, USA.
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J Photochem Photobiol B 2017 Aug 3;173:282-290. Epub 2017 Jun 3.
University of Puerto Rico, Rio Piedras Campus, PO Box 23343, San Juan, PR 00931-3343, USA. Electronic address:
Presently we continue our studies of the quantum mechanism of light energy transmission in the form of excitons by axisymmetric nanostructures with electrically conductive walls. Using our theoretical model, we analyzed the light energy transmission by biopolymers forming optical channels within retinal Müller cells. There are specialized intermediate filaments (IF) 10-18nm in diameter, built of electrically conductive polypeptides. Read More
Neurophotonics 2017 Jan 16;4(1):011005. Epub 2016 Aug 16.
Universidad Central del Caribe , School of Medicine, Department of Physiology, Bayamón 00960-6032, Puerto Rico.
Some very transparent cells in the optical tract of vertebrates, such as the lens fiber cells, possess certain types of specialized intermediate filaments (IFs) that have essential significance for their transparency. The exact mechanism describing why the IFs are so important for transparency is unknown. Recently, transparency was described also in the retinal Müller cells (MCs). Read More
Opt Express 2010 Feb;18(4):3601-7
Institute of Electro-optical Science and Engineering, National Cheng Kung University, Tainan, Taiwan 701, China.
An axially symmetric twisted nematic liquid crystal (ASTNLC) device, based on axially symmetric photoalignment, was demonstrated. Such an ASTNLC device can convert axial (azimuthal) to azimuthal (axial) polarization. The optical properties of the ASTNLC device are analyzed and found to agree with simulation results. Read More
Proc Natl Acad Sci U S A 2014 May 12;111(21):7564-9. Epub 2014 May 12.
Department of Physics, University of California, Berkeley, CA 94720;Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;Kavli Energy NanoSciences Institute at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory, Berkeley, CA 94720
Optical absorption is the most fundamental optical property characterizing light-matter interactions in materials and can be most readily compared with theoretical predictions. However, determination of optical absorption cross-section of individual nanostructures is experimentally challenging due to the small extinction signal using conventional transmission measurements. Recently, dramatic increase of optical contrast from individual carbon nanotubes has been successfully achieved with a polarization-based homodyne microscope, where the scattered light wave from the nanostructure interferes with the optimized reference signal (the reflected/transmitted light). Read More