摘要:
Embodiments of the present invention relate to a family of image-rotation prisms. Each image-rotation prism has the property that as an image-rotation prism is rotated, an image passing through the image-rotation prism rotates at twice the angular rate of the image-rotation prism. Embodiments of the present invention include optical systems that can be used for board-to-board communications and employ the image-rotation prisms to compensate for arbitrary axial rotations and misalignment of optical signals and can be used to direct optical signals output from transmitters on one board to particular detectors of a detector arrangement located on an adjacent board.
摘要:
A memristive routing device includes a memristive matrix, mobile dopants moving with the memristive matrix in response to programming electrical fields and remaining stable within the memristive matrix in the absence of the programming electrical fields; and at least three electrodes surrounding the memristive matrix. A method for tuning electrical circuits with a memristive device includes measuring a circuit characteristic and applying a programming voltage to the memristive device which causes motion of dopants within the memristive device to alter the circuit characteristic. A method for increasing a switching speed of a memristive device includes drawing dopants from two geometrically separated locations into close proximity to form two conductive regions and then switching the memristive device to a conductive state by applying a programming voltage which rapidly merges the two conductive regions to form a conductive pathway between a source electrode and a drain electrode.
摘要:
An optoelectronic memory cell has a transparent top electrode, a photoactive layer, a latching layer, and a bottom electrode. The photoactive layer absorbs photons transmitted through the top electrode and generates charge carriers. During light exposure, the latching layer changes its resistance under an applied electric field in response to the generation of charge carriers in the photoactive layer.
摘要:
A nanoscale switching device is constructed such that an electroforming process is not needed to condition the device for normal switching operations. The switching device has an active region disposed between two electrodes. The active region has at least one switching layer formed of a switching material capable of transporting dopants under an electric field, and at least one conductive layer formed of a dopant source material containing dopants that can drift into the switching layer under an electric field. The switching layer has a thickness about 6 nm or less.
摘要:
A sensing device includes a nanowire configured to deform upon exposure to a force, and a transducer for converting the deformation into a measurement. The nanowire has two opposed ends; and the transducer is operatively connected to one of the two opposed ends of the nanowire. The other of the two opposed ends of the nanowire is freestanding.
摘要:
In one aspect of the present invention, an electric-field-enhancement structure is disclosed. The electric-field-enhancement structure includes a substrate and an ordered arrangement of dielectric particles having at least two adjacent dielectric particles spaced from each other a controlled distance. The controlled distance is selected so that when a resonance mode is excited in each of the at least two adjacent dielectric particles responsive to excitation electromagnetic radiation, each of the resonance modes interacts with each other to result in an enhanced electric field between the at least two adjacent dielectric particles. Other aspects of the present invention are electric-field-enhancement apparatuses that utilize the described electric-field-enhancement structures, and methods of enhancing an electric field between adjacent dielectric particles.
摘要:
A photodetector includes a first layer, a second layer and a plurality of nanowires established between the first and second layers. At least some of the plurality of nanowires have a bandgap that is different from a bandgap of at least some other of the plurality of nanowires.
摘要:
A Fresnel antenna includes a plurality of Fresnel elements spaced to selectively attenuate electromagnetic waves having a predetermined wavelength, selected wavelengths, or range of wavelengths, and to concentrate electromagnetic waves having a predetermined wavelength, selected wavelengths, or range of wavelengths other than the attenuated wavelengths.
摘要:
Nanowire-based photodiodes are disclosed. The photodiodes include a first optical waveguide having a tapered first end, a second optical waveguide having a tapered second end, and at least one nanowire comprising at least one semiconductor material connecting the first and second ends in a bridging configuration. Methods of making the photodiodes are also disclosed.
摘要:
Devices, systems, and methods for enhancing Raman spectroscopy and hyper-Raman are disclosed. A molecular analysis device for performing Raman spectroscopy comprises a substrate and a laser source disposed on the substrate. The laser source may be configured for emanating a laser radiation, which may irradiate an analyte disposed on a Raman enhancement structure. The Raman enhancement structure may be disposed in a waveguide. The molecular analysis device also includes a wavelength demultiplexer and radiation sensors disposed on the substrate and configured for receiving a Raman scattered radiation, which may be generated by the irradiation of the analyte and Raman enhancement structure.