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33 results about "Liquid-crystal laser" patented technology
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A liquid-crystal laser is a laser that uses a liquid crystal as the resonator cavity, allowing selection of emission wavelength and polarization from the active laser medium. The lasing medium is usually a dye doped into the liquid crystal. Liquid-crystal lasers are comparable in size to diode lasers, but provide the continuous wide spectrum tunability of dye lasers while maintaining a large coherence area. The tuning range is typically several tens of nanometers. Self-organization at micrometer scales reduces manufacturing complexity compared to using layered photonic metamaterials. Operation may be either in continuous wave mode or in pulsed mode.
Estradiol detection device based on liquid crystal-gold nanoparticle laser sensor
PendingCN121740770APhase-affecting property measurementsColor/spectral properties measurementsBio moleculesWhispering gallery
The invention belongs to the technical field of liquid crystal laser sensing, and relates to an estradiol detection device based on a liquid crystal-gold nanoparticle laser sensor. The optical flow control optical fiber is used as an echo wall resonator. In order to realize an estradiol sensing function, the DNA aptamer is modified on the inner surface of the optical flow control optical fiber to realize specific capture of estradiol. After the aptamer is combined with estradiol, the interaction between the aptamer and estradiol triggers the aptamer imaging change, so that the liquid crystal molecule realizes the conversion from a bipolar type to a radial type, and the conversion leads to the reduction of the refractive index, thereby causing the blue shift of the spectrum. By virtue of a local disturbance effect based on the gold nanoparticles, a quadruple synergistic effect of hyperpolarizability change of modified biomolecules, liquid crystal molecule orientation and echo wall mode resonance, an opportunity is provided for sensing and amplifying subtle detection of a target binding event. The problem of low sensitivity caused by common naked eye observation or wide spectrum monitoring in a liquid crystal microdroplet sensor is solved.
Owner:DALIAN UNIV OF TECH