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Hybrid polymer photonic crystal band-edge lasers are chemically activated to covalently bind bio-molecules or for HeLa cell attachment using an anthraquinone (AQ) UV activated photolinker. The lasers change emission wavelength linearly with inhomogeneous cell coverage.
An ultrafast optical microscope capable of rapidly and sensitively acquiring wide field optical images with sub-100 femtosecond temporal resolution and micrometer spatial resolution is demonstrated for the first time.
MEH-PPV:fullerene composites show strong nonlinear absorption in the near infrared and potential as optical limiters. The photophysics and nonlinear optics of the composites are consistent with the formation of absorbing charge carriers.
A precisely controllable positioning stage based on an optical-zooming interferometer using two diode lasers locked to a fs-comb was developed. The nonlinearity error of positioning was 0.6 nm and control resolution was 20 pm.
We combine plasmonic grating structures with commercially available semiconductor laser diode packages to realize a prototype miniaturized chemical/bio-sensor.
Quantum cascade laser based breath sensor platform for medical applications employing a quartz-enhanced photoacoustic spectroscopy technique is reported. The detection sensitivity for exhaled ammonia is at <10 ppbv level with 1 s time resolution.
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