All-optical photochromic spatial light modulators based on photoinduced electron transfer in rigid matrices

A single material (not a multi-element structure) spatial light modulator may be written to, as well as read out from, using light. The device has tailorable rise and hold times dependent on the composition and concentration of the molecular species used as the active components. The spatial resolution of this device is limited only by light diffraction as in volume holograms. The device may function as a two-dimensional mask (transmission or reflection) or as a three-dimensional volume holographic medium. This device, based on optically-induced electron transfer, is able to perform incoherent to coherent image conversion or wavelength conversion over a wide spectral range (ultraviolet, visible, or near-infrared regions)

The synthesis of a symmetrically substituted α-octa(isopentoxy)anthralocyanine

α-Octa(isopentoxy)anthralocyanine has been synthesized and is found to have an unprecedented low-energy Q-band absorption and a low first oxidation potential

Enhanced reverse saturable absorption and optical limiting in heavy-atom-substituted phthalocyanines

The reverse saturable absorption and the optical-limiting response of metal phthalocyanines can be enhanced by use of the heavy-atom effect. Phthalocyanines containing heavy-metal atoms, such as In, Sn, and Pb, show a nearly factor-of-2 enhancement in the ratio of effective excited-state to ground-state absorption cross sections compared with those containing lighter atoms, such as Al and Si. In an f/8 optical geometry, homogeneous solutions of heavy-metal phthalocyanines, at 30% linear transmission, limit 8-ns 532-nm laser pulses to ≤ 3 µJ the energy for 50% probability of eye damage) for incident energies as high as 800 µJ

Physicians and the Income Tax

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Diagnosis and Treatment of Sacroiliac Joint Dysfunction: A Case Report

Sacroiliac joint dysfunction (SIJD) is plausible and can be treated through skilled physical therapy. The purpose of this case study is to educate and inform on the treatment for sacroiliac joint dysfunction. The patient was an 81 year old female, who was direct access and presented to physical therapy with complaints of left buttock and hamstring pain that was exacerbated with prolonged sitting. Upon physical examination it was determined the patient presented with SIJD which demonstrated a left on left sacral rotation, left ups lip, and bilateral anterior rotation of either pelvis intermittently. Official diagnosis was sprain of the sacroiliac join and pain in the left leg (S33.6XXD, M79.60S). The patient was seen for twenty-one visits, an hour each visit. Upon discharge the patient was pain free, without reoccurrence of symptoms. Manual therapy, strength training, stretching and modalities were used in her treatment sessions with achievement of goals and good outcomes

Molecular photonics: high-speed materials for optical signal processing

Issued as final reportUnited States. Office of Naval Researc