摘要:
Photonic crystal sensors may be created from two and three dimensional photonic crystals by introducing defects. The localization of the optical field in the defect region affords the ability to sense small volumes of analyte.
摘要:
A photonic crystal optical temperature measuring system and a method for measuring the temperature of an object. The photonic crystal optical temperature measuring system has at least one photonic crystal temperature sensor having a resonant cavity, the resonant frequency of which is a function of the temperature of the resonant cavity.
摘要:
Two-dimensional photonic crystal slab apparatus and a method for fabricating two-dimensional photonic crystal slab apparatus. A two-dimensional photonic crystal slab apparatus has a photonic crystal slab containing a two-dimensional periodic lattice, and upper and lower cladding layers for the photonic crystal slab, the upper and lower cladding layers each having a metallic cladding layer. The metallic cladding layers permit achieving substantially perfect light transmission through a waveguide in the slab, even when the waveguide is strongly bent. The fabrication method includes forming a two-dimensional photonic crystal slab from a dielectric slab supported on a substrate by, for example, an etch process.
摘要:
Photonic crystal sensors may be created from two and three dimensional photonic crystals by introducing defects. The localization of the optical field in the defect region affords the ability to sense small volumes of analyte.
摘要:
An apparatus and method for measuring a target environmental variable (TEV) that employs a film-bulk acoustic resonator with motion plate. The film-bulk acoustic resonator (FBAR) includes an acoustic reflector formed in an FBAR wafer and a surface. A first electrode is formed on the surface of the acoustic reflector and has a surface. A piezoelectric layer is formed on the surface of the first electrode and has a surface. A second electrode is formed on the surface of the piezoelectric layer. A motion plate is suspended in space at a predetermined distance relative to the surface of the second electrode and is capacitively coupled to the FBAR.
摘要:
A humidity sensor that includes a resonant structure and a structure for altering a resonant frequency of the resonant structure in response to a change in humidity. The structures of a humidity sensor according to the present teachings may be formed in relatively small form factors and are well suited to remote applications and providing mechanisms for compensating for temperature drift.
摘要:
A photonic crystal sensor adapted for single nanoparticle detection is disclosed. Very small single particles and single molecules may be detected. The sensors may be adapted to allow differential measurements.
摘要:
The external cavity laser includes a resonant cavity defined at one end by a Bragg reflector and a gain medium located in the optical cavity. Coupled to the Bragg reflector is an actuator that changes the pitch of the Bragg reflector and, hence, the wavelength at which the optical cavity is resonant. The wavelength of the light generated by the external cavity laser can therefore be tuned by a single control signal applied to the actuator.
摘要:
A method for manufacturing refractive microlenses and other three-dimensional micromechanical structures having desired properties. At least one first micromechanical structure is formed by dispensing a first material onto a surface of a first substrate, a mold is prepared using the at least one first micromechanical structure, and at least one second micromechanical structure of a second material is molded on a surface of a second substrate using the mold. The at least one first micromechanical structure is formed of a material that is suitable to the procedure by which it is dispensed, and the at least one second micromechanical structure is formed of a material that provides desired properties.
摘要:
The application relates to methods for producing islands of functionality within nanoscale apertures. Islands of functionality can be produced by growing an aperture constriction layer from the walls, functionalizing the exposed base of the aperture, then removing the aperture constriction layer. The aperture constriction layer can be produced, for example, by anodically growing an oxide layer onto a cladding through which the aperture extends. The islands of functionality can be used to bind a single molecule of interest, such as an enzyme within the nanoscale aperture.