Abstract: A method of manufacturing a platform (10) for an integrated electronic and optical circuit comprises forming at least one optical device portion in a CMOS compatible substrate (12), wherein the optical device portion comprises a waveguide layer (22) and a barrier layer (20) arranged to confine light to a region of the waveguide layer, wherein forming the at least one optical device potion comprises: forming at least one trench (14) in the substrate (12); depositing the barrier layer (20) in the at least one trench (14); depositing the waveguide layer (22) over the barrier layer (20), and planarizing the substrate (12).

Abstract: A laser comprising: at least one wavelength selective reflector that comprises a waveguide vertically coupled to at least one photonic crystal resonator, the waveguide and photonic crystal resonator being arranged to provide wave-vector matching between at least one mode of the photonic crystal resonator and at least one mode of the waveguide; an optical gain medium for generating light for coupling into the waveguide, and a reflector at an end of the optical gain medium, the reflector and the photonic crystal resonator defining a laser cavity. Light generated by the optical gain medium is coupled into the waveguide and coupled into the photonic crystal resonator, and partially reflected back to the optical gain medium.

Abstract: A device comprising a metal layer on a crystalline silicon substrate, and a waveguide that has a refractive index greater than that of the crystalline silicon, wherein the waveguide is arranged to couple light to a surface plasmon mode at an interface between the silicon substrate and the metal layer when a waveguide mode is phase matched to the surface plasmon mode.

Abstract: A laser comprising: at least one wavelength selective reflector that comprises a waveguide vertically coupled to at least one photonic crystal resonator, the waveguide and photonic crystal resonator being arranged to provide wave-vector matching between at least one mode of the photonic crystal resonator and at least one mode of the waveguide; an optical gain medium for generating light for coupling into the waveguide, and a reflector at an end of the optical gain medium, the reflector and the photonic crystal resonator defining a laser cavity. Light generated by the optical gain medium is coupled into the waveguide and coupled into the photonic crystal resonator, and partially reflected back to the optical gain medium.

Abstract: A device comprising a metal layer on a crystalline silicon substrate, and a waveguide that has a refractive index greater than that of the crystalline silicon, wherein the waveguide is arranged to couple light to a surface plasmon mode at an interface between the silicon substrate and the metal layer when a waveguide mode is phase matched to the surface plasmon mode.

Abstract: An optical device including: a waveguide of refractive index na for carrying at least one mode of at least one wavelength, and at least one resonator with a resonant wavelength. The resonator has a mode volume of less than ten cubic resonant wavelengths. In use light in the waveguide is vertically coupled into the at least one resonator, and the waveguide and resonator(s) are arranged to provide wave-vector matching between at least one mode of the resonator and at least one mode of the waveguide.

Abstract: An optical device including: a waveguide of refractive index na for carrying at least one mode of at least one wavelength, and at least one resonator with a resonant wavelength. The resonator has a mode volume of less than ten cubic resonant wavelengths. In use light in the waveguide is vertically coupled into the at least one resonator, and the waveguide and resonator(s) are arranged to provide wave-vector matching between at least one mode of the resonator and at least one mode of the waveguide.

Abstract: Multiple site information of light intensity is obtained by application of a multiple-fibre probe in a real-time optical monitoring system. The multiple-fibre probe includes a plurality of optical fibres distributed along the length of the probe. Each optical fibre may be is switchable between the mode for transmitting optical signal into the malignant tissue and the mode for collecting the optical signal from the same tissue. Thus the numbers of the probes can be minimized for collecting multiple site light information and the irritation to the tissue is reduced. A method of using such a probe to determine coagulated boundary in thermal or other treatment is also described.

Abstract: An air drag reducing apparatus is mounted on the rearward surface of a large vehicle. The apparatus comprises first and second pairs of identical panels having a base edge and first and second side edges extending from the base edge, and mating hinge plates and hinge pin. The base edges of the first pair of panels are adapted for mounting to one of the opposed vertical side edges of the rearward surface of the large vehicle and the base edges of the second pair of panels are adapted for mounting to one of the upper and lower side edges of the rearward surface. The second side edge of each of the first pair of panels is hingedly connected to the first side edge of a respective one the second pair of panels so as to form one of two fold-away portions of the apparatus. Each of the panels is symmetric about a respective axis of symmetry. At least one of the angles formed between the edges of the panels and the sides of the rearward surface of the vehicle is between 18 and 30 degrees.

Abstract: A remote tracking and sensing device (20) includes a global positioning system receiver (22). A processor (24) receives a position signal from the global positioning system receiver (22). A communication interface (30) connects the processor (24) to at least two wireless communication systems (26, 28). A power management system (32) provides power to the processor (24) based on an output (38) from a motion sensor (40).