32 results about "Nanophotonics" patented technology

The present invention relates to near-field scanning optical microscopy (NSOM) and near-field/far-field scanning microscopy methods, systems and devices that permit the imaging of biological samples, including biological samples or structures that are smaller than the wavelength of light. In one embodiment, the present invention permits the production of multi-spectral, polarimetric, near-field microscopy systems that can achieve a spatial resolution of less than 100 nanometers. In another embodiment, the present invention permits the production of a multifunctional, multi-spectral, polarimetric, near-field/far-field microscopy that can achieve enhanced sub-surface and in-depth imaging of biological samples. In still another embodiment, the present invention relates to the use of polar molecules as new optical contrast agents for imaging applications (e.g., cancer detection).

A method of forming an integrated photonic semiconductor structure having a photonic device and a CMOS device may include depositing a first silicon nitride layer having a first stress property over the photonic device, depositing an oxide layer having a stress property over the deposited first silicon nitride layer, and depositing a second silicon nitride layer having a second stress property over the oxide layer. The deposited first silicon nitride layer, the oxide layer, and the second silicon nitride layer encapsulate the photonic device.

A method of forming an integrated photonic semiconductor structure having a photodetector device and a CMOS device may include depositing a dielectric stack over the photodetector device such that the dielectric stack encapsulates the photodetector. An opening is etched into the dielectric stack down to an upper surface of a region of an active area of the photodetector. A first metal layer is deposited directly onto the upper surface of the region of the active area via the opening such that the first metal layer may cover the region of the active area. Within the same mask level, a plurality of contacts including a second metal layer are located on the first metal layer and on the CMOS device. The first metal layer isolates the active area from the occurrence of metal intermixing between the second metal layer and the active area of the photodetector.

The invention belongs to the field of nanophotonics, and relates to a manufacturing method for a nanowire with a CuO/ZnO core/shell structure. The method comprises the following steps of: 1, heating a copper foil with a cleaned surface in the air by using a thermal oxidation method to grow a CuO nanowire array arranged directionally; 2, dripping saturated zinc acetate ethanol solution onto the CuO nanowire array prepared in the step 1 and naturally airing the solution in the air; and 3, heating the CuO nanowire array covered with zinc acetate on an electric stove of 350 DEG C for 15 to 30 minutes to obtain the CuO/ZnO core/shell structure. The method provided by the invention has the advantages of simplicity, quickness, low cost, capacity of being produced on a large scale, and the like.

Systems and methods of sensing intraocular pressure are described. In one embodiment, a miniaturized IOP monitoring system is provided using a nanophotonics-based implantable IOP sensor with remote optical readout that can be adapted for both patient and research use. A handheld detector optically excites the pressure-sensitive nanophotonic structure of the IOP-sensing implant placed in the anterior chamber and detects the reflected light, whose optical signature changes as a function of IOP. Optical detection eliminates the need for large, complex LC structures and simplifies sensor design. The use of nanophotonic components improves the sensor's resolution and sensitivity, increases optical readout distance, and reduces its size by a factor of 10-30 over previously reported implants. Its small size and convenient optical readout allows frequent and accurate self-tracking of IOP by patients in home settings. Embodiments can also be used to monitor colonies of animals to support glaucoma research and drug discovery.

The invention discloses a method for forming a dimer structure by assembling a DNA origami template and a nanometer gold cube based on a surface enhanced Raman effect. The method specifically comprises the five steps of preparation of triangular DNA origami with specific sites; preparation of a sulfydryl DNA modified nanometer gold cube; preparation of three dimer configurations; and high efficiency precise assembly by using agarose gel electrophoresis and a transmission electron microscope representational structure, and surface enhanced Raman scattering by using a scanning electron microscope and dark-field microscope co-location detection assembly structure. The method solves the problems of low assembly repeatability and poor structural stability, a new idea is also provided for construction of nanometer optical materials due to establishment of the method, and the method is of great significance to research of nanophotonics.

A device for generation of genuine random numbers, uses quantum stochastic processes in optical parametric nonlinear media. The dimensionality of the random numbers is varied from 2 to over 100,000. Their statistical properties, including the correlation function amongst random numbers, are tailored using linear and nonlinear optical circuits following the parametric nonlinear media. Both the generation and manipulation of random numbers can be integrated on a single nanophotonics chip. By incorporating optoelectric effects, fast streams of random numbers can be created in custom statistical properties, which can be updated or reconfigured in real time, such as at 10 GHz speed. The unpredictability of the random numbers is quantifying by evaluating their min-entropy. The genuineness of quantum random numbers is tested using both statistical tools and independently verified by measuring the quantum entanglement between the photons in real time reducing vulnerability to hostile attack.

A new class of surface plasmon waveguides is presented. The basis of these structures is the presence of surface plasmon modes, supported on the interfaces between the dielectric regions and the flat unpatterned surface of a bulk metallic substrate. The waveguides discussed here are promising to have significant applications in the field of nanophotonics by being able to simultaneously shrink length, time and energy scales, allowing for easy coupling over their entire bandwidth of operation, and exhibiting minimal absorption losses limited only by the intrinsic loss of the metallic substrate. These principles can be used for many frequency regimes (from GHz and lower, all the way to optical).

The invention belongs to the field of nanophotonics, and provides a silicon-based ultra-wide spectrum photon absorber and a preparation method thereof, and aims to solve the technical problem that inthe prior art, silicon-based optical and photoelectric devices cannot achieve efficient absorption in ultraviolet, visible and near-infrared bands. The absorber comprises a first metal film layer, a first disordered nano bowl array layer, a silicon substrate, a second disordered silicon nano bowl array layer and a second metal film layer, a double-sided disordered metal/silicon nano bowl array composite structure can efficiently absorb more than 80% of incident photons within the waveband range of 200-2500nm, is insensitive to the polarization and angle of incident light, and has a wide application prospect in the fields of photoelectric detection and reverse detection, solar cells, photoelectric sensing and the like.

The invention discloses a method for simply preparing an Au-Ag dual-metal nanoparticle film of a meshed structure. According to the method, a small quantity of AgNO3 is added in the synthetic process of Au seeds, Ag+ is stably adsorbed to the surfaces of Au nanoparticles, and thus the Au nanoparticles have anisotropy in the growing process; and then the Au nanoparticles containing Ag are used as seeds, no inductive agent needs to be added, and the Au-Ag dual-metal nanoparticle film which is of the meshed structure and has a clean surface can be obtained through self-assembling on a gas-liquid interface under the normal temperature condition. The method is simple and rapid, reaction conditions are mild, no inductive agent or organic solvent needs to be added, and the prepared nanoparticle film has extremely good stability and has potential application value in the aspects of surface-enhanced raman, plasma nanometer circuits, nanophotonics, electro-catalysis and new energy application. The method can also be used for preparing other dual-metal nanoparticle film materials.

The invention relates to a directional emission organic semiconductor light emitting diode array based on metal nano electrodes and preparation thereof, and belongs to the technical field organic optoelectronics and nanophotonics. On a glass substrate, a photoresist nano grating is utilized to serve as a template, nano-scale organic light emitting diodes parallel to the located inclined planes areprepared on the inclined planes at the same side of each convex grid line of the nano grating, and the nano-scale organic light emitting diode includes an anode layer Au, a hole transport layer PEDOT: PSS, an organic light emitting layer F8BT film, an electron transport layer LiF and a cathode Al which are sequentially laminated outward from the side surface of the convex grid line. The inclinedorganic light emitting diodes are formed on the nano grating structure, and all of the organic light emitting diodes form an array structure. The device achieves the working mode of end emission and obtains the directional emission nano OLED (Organic Light Emitting Diode) array.

The invention provides a preparation method of a surface plasmon metamaterial, and belongs to the technical field of nanophotonics and nanofabrication. According to the preparation method, the thickness of a spin-coated photoresist is controlled through an electroplating process to realize control over the thickness of an intermediate layer in metal-medium-metal, and different medium thicknesses can serve as an optical cavity and can be coupled with surface plasmons to realize different optical responses; and meanwhile, optical absorption is enhanced by means of the ohmic loss of metal, almost-perfect optical absorption (the absorption rate is close to 100%) and high-quality factor optical cavities are realized by means of the electromagnetic energy localization effect of the surface plasmons. The technical method is simple, stable and cheap and can realize large-area processing.

The invention belongs to the field of nanophotonics, and discloses a method for realizing a micronano all-optical color. The method comprises the following steps of: arranging two or three nanowires on a glass substrate in turn to form a cross knot; coupling red light, green light or blue light into the nanowires through optical fibers connected with the nanowires respectively; and synthesizing colored light spots in various colors at the cross knot. In the method, an electric driver or a color filter is not needed; and the method has the advantages of easiness in fabrication and the like.