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We develop photoacoustic imaging technologies for in vivo early-cancer detection and functional, metabolic, molecular, and histologic imaging by physically combining non-ionizing electromagnetic and ultrasonic waves. Unlike ionizing x-ray radiation, non-ionizing electromagnetic waves — such as optical and radio waves — pose no health hazard and reveal new contrast mechanisms. Unfortunately, electromagnetic...
AOM-RN, an acousto-optic modulator designed to operate in the pure Raman-Nath diffraction regime, was applied as an optical phase modulator in FM spectroscopy of saturated absorption resonances, coherent population trapping resonances, sub-natural magneto-optical resonances in Cs vapor, i.e. such kind of optical resonances which are currently employed as the frequency references in metrology of the...
A new method, previously reported, for fabricating optical diffraction gratings involves writing a periodic magnetic pattern in a magnetic memory medium and using a magnetic fluid as magnetic toner to render the pattern visible. Using this method, an optical grating can easily be prepared even on convex and concave surfaces. Because the optical characteristics of such relief-type gratings are determined...
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