USA As Represented by Secretary of the Navy

Jeffrey C Owrutsky

Joshua D Caldwell

Orest J Glembocki

James Peter Long

Albert Epshteyn

Tatyana I Feygelson

Bradford B Pate

Paul A Desario

William Maza

Vanessa Breslin

Debra R Rolison

Jeffrey W Long

Christopher N Chervin

Jeremy J Pietron

Joseph S Melinger

Kenan P Fears

Carlos M Hangarter

Daniel A Steinhurst

Adam Dunkelberger

Blake Simpkins

Carlos Hangarter

Disclosed is a method of irradiating a composition having water and hydrogen-terminated nanodiamonds with light that generates water-solvated electrons from the nanodiamonds. The method can be used to degrade fluoroalkyl compounds such as perfluorooctane sulfonate.

Nanodiamond reduction photochemistry

An apparatus including an optical resonator, and a method of using same. The optical limiter includes an optically absorbent material. The optical resonator supports a plurality of resonant transmission peaks at resonant frequencies defined by the cavity length. The optically absorbent material exhibits a saturable absorption response at a fundamental absorption peak located spectrally at a fundamental absorption peak frequency of the plurality of resonant transmission peaks. The optically absorbent material includes an absorptivity sufficient for strong cavity coupling, such that the fundamental absorption peak splits into a first upper vibration polariton transmission peak and a second lower polariton transmission peak separated by a Rabi splitting. The Rabi splitting is proportional to a square root of the absorptivity. The absorptivity varies with optical excitation of the optically absorbent material. The absorptivity is maximized at a photon-unsaturated ground state, and the absorptivity is minimized at an optically excited state.

Intrinsic and tunable self-modulating optical limiter via strong cavity coupling

Optical devices that include one or more structures fabricated from polar-dielectric materials that exhibit surface phonon polaritons (SPhPs), where the SPhPs alter the optical properties of the structure. The optical properties lent to these structures by the SPhPs are altered by introducing charge carriers directly into the structures. The carriers can be introduced into these structures, and the carrier concentration thereby controlled, through optical pumping or the application of an appropriate electrical bias.

Actively tunable polar-dielectric optical devices

Disclosed herein is an article having: a substrate and a RuOcoating having nanoparticles of RuO. Also disclosed herein is an article having: a substrate and a RuOcoating. The coating is made by: immersing the substrate in a solution of RuOand a nonpolar solvent at a temperature that is below the temperature at which RuOdecomposes to RuOand warming the substrate and solution to ambient temperature under ambient conditions to cause the formation of the coating.

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A method for detecting a fire while discriminating against false alarms in a monitored space containing obstructed and partially obstructed views includes the steps of positioning an infrared camera in a location where the camera has both a direct view of a first portion of the monitored space and an obstructed view of a second portion of the monitored space, the camera including a charge coupled device (CCD) array sensitive to wavelengths in the range of from about 400 to about 1000 nm and a long pass filter for transmitting wavelengths greater than about 700 nm; filtering out radiation wavelengths lower than about 700 nm; converting an electrical current from the CCD array to a signal input to a processor; processing the signal; and generating alarms when predetermined criteria are met to indicate the presence of a fire in one or both of the first portion of the monitored space and the second portion of the monitored space. Indirect radiation, such as radiation scattered and reflected from common building or shipboard materials and components, indicative of a fire can be detected. The method can be implemented with relatively low cost components. A benefit of using the invention in a system in combination with Video Image Detection Systems (VIDS) is that in principle both fire and smoke can be detected for an entire compartment without either kind of source having to be in the direct LOS of the cameras, so that the entire space can be monitored for both kinds of sources with a single system.

Fire detection method

Growing community of inventors

Silver Spring, MD, United States of America

Jeffrey C Owrutsky