Abstract: A system includes an illumination source, a detector and a processor. The detector acquires spectral measurements of a sample under test under at least one varying condition. The processor processes the measurements to generate at least one spectral representation that includes Raman spectra and at least one spectral representation that includes non-Raman spectra.

Abstract: A system includes an optical Y-junction coupler to receive a first modulated optical signal on a wide input path of the optical Y-junction coupler and to receive a second modulated optical signal on a narrow input path of the optical Y-junction coupler, wherein the optical Y-junction coupler generates a combined optical signal from signals received on the wide input path and the narrow input path. A multimode waveguide receives the combined optical signal from the optical Y-junction coupler and propagates a spatially multiplexed optical output signal along a transmission path.

Abstract: A dynamic optical crossbar array includes a first set of parallel transparent electrode lines, a bottom set of parallel electrode lines that cross said transparent electrode lines, and an optically variable material disposed between said first set of transparent electrode lines and said bottom set of electrode lines.

Abstract: A memristor structure may be provided that includes a first electrode, a second electrode, and a buffer layer disposed on the first electrode. The memristor structure may include a switching layer interposed between the second electrode and the buffer layer to form, when a voltage is applied, a filament or path that extends from the second electrode to the buffer layer and to form a Schottky-like contact or a heterojunction between the filament and the buffer layer.

Abstract: An apparatus for performing a sensing application may a substrate having a plurality of nano-fingers positioned to receive the dispensed solution , first and second reservoirs, first and second dispensers to dispense first and second solutions from the first and second reservoirs onto first and second subsets of the plurality of nano-fingers. The plurality of nano-fingers are flexible, such that the plurality of nano-fingers are configurable with respect to each other. The apparatus may include an illumination source to illuminate the first and second solutions and an analyte introduced around the plurality of nano-fingers, wherein light is to be emitted from the analyte in response to being illuminated. The apparatus may include a detector to detect the light emitted from the analyte.

Abstract: Examples of integrated sensors are disclosed herein. An example of an integrated sensor includes a substrate and a sensing member formed on a surface of the substrate. The sensing member includes collapsible signal amplifying structures and an area surrounding the collapsible signal amplifying structures that enables self-positioning of droplets exposed thereto toward the collapsible signal amplifying structures.

Abstract: An apparatus for performing a sensing application may a substrate having a plurality of nano-fingers positioned to receive the dispensed solution , first and second reservoirs, first and second dispensers to dispense first and second solutions from the first and second reservoirs onto first and second subsets of the plurality of nano-fingers. The plurality of nano-fingers are flexible, such that the plurality of nano-fingers are configurable with respect to each other. The apparatus may include an illumination source to illuminate the first and second solutions and an analyte introduced around the plurality of nano-fingers, wherein light is to be emitted from the analyte in response to being illuminated. The apparatus may include a detector to detect the light emitted from the analyte.

Abstract: Examples of integrated sensors are disclosed herein. An example of an integrated sensor includes a flexible substrate, and an array of spaced apart sensing members formed on a surface of the flexible substrate. Each of the spaced apart sensing members includes a plurality of polygon assemblies. The polygon assemblies are arranged in a controlled pattern on the surface of the flexible substrate such that each of the plurality of polygon assemblies is a predetermined distance from each other of the plurality of polygon assemblies, and each of the plurality of polygon assemblies including collapsible signal amplifying structures controllably positioned in a predetermined geometric shape.

Abstract: An apparatus for performing a sensing application includes a reservoir to contain a solution, a dispenser to dispense the solution from the reservoir, and a substrate having a plurality of nano-fingers positioned to receive the dispensed solution, in which the plurality of nano-fingers are flexible, such that the plurality of nano-fingers are configurable with respect to each other. The apparatus also includes an illumination source to illuminate the received solution, an analyte introduced around the plurality of nano-fingers, and the plurality of nano-fingers, in which light is to be emitted from the analyte in response to being illuminated. The apparatus further includes a detector to detect the light emitted from the analyte.

Abstract: A memristor structure may be provided that includes a first electrode, a second electrode, and a buffer layer disposed on the first electrode. The memristor structure may include a switching layer interposed between the second electrode and the buffer layer to form, when a voltage is applied, a filament or path that extends from the second electrode to the buffer layer and to form a Schottky-like contact or a heterojunction between the filament and the buffer layer.

Abstract: A scattering spectroscopy nanosensor includes a nanoscale-patterned sensing substrate to produce an optical scattering response signal indicative of a presence of an analyte when interrogated by an optical stimulus. The scattering spectroscopy nanosensor further includes a protective covering to cover and protect the nanoscale-patterned sensing substrate. The protective covering is to be selectably removed by exposure to an optical beam incident on the protective covering. The protective covering is to prevent the analyte from interacting with the nanoscale-patterned sensing substrate prior to being removed.

Abstract: A negative index material (or metamaterial) crossbar includes a first layer of approximately parallel nanowires and a second layer of approximately parallel nanowires that overlay the nanowires in the first layer. The nanowires in the first layer are approximately perpendicular in orientation to the nanowires in the second layer. Each nanowire of the first layer and each nanowire of the second layer has substantially regularly spaced fingers. The crossbar further includes resonant elements at nanowire intersections between the respective layers. Each resonant element includes two fingers of a nanowire in the first layer and two fingers of a nanowire in the second layer.

Abstract: A scattering spectroscopy nanosensor includes a nanoscale-patterned sensing substrate to produce an optical scattering response signal indicative of a presence of an analyte when interrogated by an optical stimulus. The scattering spectroscopy nanosensor further includes a protective covering to cover and protect the nanoscale-patterned sensing substrate. The protective covering is to be selectably removed by exposure to an optical beam incident on the protective covering. The protective covering is to prevent the analyte from interacting with the nanoscale-patterned sensing substrate prior to being removed.

Abstract: Embodiments of the present invention are directed to nanoscale memristor devices that provide nonvolatile memristive switching. In one embodiment, a memristor device comprises an active region, a first electrode disposed on a first surface of the active region, and a second electrode disposed on a second surface of the active region, the second surface opposite the first surface. The first electrode is configured with a larger width than the active region in a first direction, and the second electrode is configured with a larger width than the active region in a second direction. Application of a voltage to at least one of the electrodes produces an electric field across a sub-region within the active region between the first electrode and the second electrode.

Abstract: A scattering spectroscopy nanosensor includes a nanoscale-patterned sensing substrate to produce an optical scattering response signal indicative of a presence of an analyte when interrogated by an optical stimulus. The scattering spectroscopy nanosensor further includes a protective covering to cover and protect the nanoscale-patterned sensing substrate. The protective covering is to be selectably removed by exposure to an optical beam incident on the protective covering. The protective covering is to prevent the analyte from interacting with the nanoscale-patterned sensing substrate prior to being removed.

Abstract: A holographic mirror 10 for re-directing an optical signal that includes a base 14 having an outer surface 16, and a plurality of discrete nano-structures 12 formed into the outer surface of the base. Each nano-structure has an out-of-plane dimension 20 that is within an order of magnitude of one or both in-plane dimensions 22. The plurality of nano-structures are configured in a repeating pattern with a predetermined spacing 18 between nano-structures for re-directing an optical signal.

Abstract: Embodiments of the present invention are directed to nanoscale memristor devices that provide nonvolatile memristive switching. In one embodiment, a memristor device includes an active region, a first electrode disposed on a first surface of the active region, and a second electrode disposed on a second surface of the active region, the second surface opposite the first surface. The first electrode is configured with a smaller width than the active region in a first direction, and the second electrode is configured with a larger width than the active region in a second direction. Application of a voltage to at least one of the electrodes produces an electric field across a sub-region within the active region between the first electrode and the second electrode.

Abstract: According to an example, an apparatus for performing spectroscopy includes a parabolic reflector and a plurality of surface-enhanced Raman spectroscopy (SERS) elements spaced from the parabolic reflector and positioned substantially at a focal point of the parabolic reflector. The parabolic reflector is to reflect Raman scattered light emitted from molecules in a near field generated by the plurality of SERS elements to substantially increase the flux of the Raman scattered light emitted out of the apparatus.

Abstract: A system includes an illumination source, a detector and a processor. The detector acquires spectral measurements of a sample under test under at least one varying condition. The processor processes the measurements to generate at least one spectral representation that includes Raman spectra and at least one spectral representation that includes non-Raman spectra.

Abstract: A surface enhanced Raman spectroscopy (SERS) apparatus employs a nanorod in an indentation in a surface of a substrate. The SERS apparatus includes the nanorod having a tip at a free end opposite to an end of the nanorod that is supported by the substrate indentation. The indentation has a tapered profile and supports the nanorod at a bottom of the indentation. The free end of the nanorod extends away from the indentation bottom. The SERS apparatus further includes a Raman-active material at a surface of one or both of the nanorod and the indentation. The indentation and the nanorod facilitate one or both of production and detection of a Raman scattering signal emitted by an analyte in a vicinity of the nanorod and indentation.