摘要:
A sensor apparatus includes a laser optically coupled to a photonic crystal structure configured to provide an evanescent field through a sensed medium region such that the photonic crystal structure functions as a cavity/resonator for the laser.
摘要:
A sensor apparatus includes a photonic crystal structure including a Mach Zehnder interferometer with a reference arm and a sensor arm configured to provide an evanescent field through a sensed medium region adjacent to the sensor arm.
摘要:
A NERS-active structure includes a deformable, active nanoparticle support structure for supporting a first nanoparticle and a second nanoparticle that is disposed proximate the first nanoparticle. The nanoparticles each comprise a NERS-active material. The deformable, active nanoparticle support structure is configured to vary the distance between the first nanoparticle and the second nanoparticle while performing NERS. Various active nanoparticle support structures are disclosed. A NERS system includes such a NERS-active structure, a radiation source for generating radiation scatterable by an analyte located proximate the NERS-active structure, and a radiation detector for detecting Raman scattered radiation scattered by the analyte. A method for performing NERS includes providing such a NERS-active structure, providing an analyte at a location proximate the NERS-active structure, irradiating the NERS-active structure and the analyte with radiation, varying the distance between the nanoparticles, and detecting Raman scattered radiation scattered by the analyte.
摘要:
A nano-colonnade VCSEL device and a method of fabrication utilize a nanowire column grown nearly vertically from a (111) horizontal surface of a first layer to another horizontal surface of a second layer to connect the layers. The VCSEL device includes a first layer having the (111) horizontal surface; a second layer; and an insulator support between the first layer and the second layer that separates the first layer from the second layer. A portion of the second layer overhangs the insulator support, such that a horizontal surface of the overhanging portion is spaced from and faces the (111) horizontal surface of the first layer. The VCSEL device further includes a nanowire column extending nearly vertically from the (111) horizontal surface to the facing horizontal surface, and distributed Bragg mirrors adjacent to opposite end of the nanowire column.
摘要:
Integrated radiation source/amplifying structures for use in surface enhanced Raman spectroscopy (SERS) and hyper-SERS are disclosed. The structures include a radiation source integrated with a SERS-active structure that is provided within a resonant cavity. SERS and hyper-SERS systems employing the integrated radiation source/amplifying structures are disclosed. Methods of performing SERS and hyper-SERS are also disclosed.
摘要:
A nanochannel apparatus and method of fabrication provide an array of nanochannels with distal open or exposed ends formed in situ through a permanent support. A nanofluidic system includes the nanochannel apparatus, a fluidic interface, and a component interfaced to the nanochannel apparatus. The method includes encasing an array of nanowires in a support, and forming the array of nanochannels in situ in locations of the nanowires, such that distal ends of the nanochannels are exposed.
摘要:
Light sources that use diamond nanowires, and methods of forming the same, are described. For example, the light source can include a diamond nanowire that bridges the gap between a first electrode and a second electrode to electrically couple the two electrodes. A power source coupled to the first and second electrodes forms a circuit. The diamond nanowire emits light with the power source turned on.
摘要:
Irradiation devices and methods of amplification and irradiation are disclosed for displaying pixels and Surface Enhanced Raman Spectroscopy (SERS) analysis. The devices include an optical modulator, which may be configured for operation in a variably transmissive state. An active region may be formed in an optical waveguide with the optical modulator configured substantially adjacent at least one surface of the active region.
摘要:
A nano-colonnade structure-and methods of fabrication and interconnection thereof utilize a nanowire column grown nearly vertically from a (111) horizontal surface of a semiconductor layer to another horizontal surface of another layer to connect the layers. The nano-colonnade structure includes a first layer having the (111) horizontal surface; a second layer having the other horizontal surface; an insulator support between the first layer and the second layer that separates the first layer from the second layer. A portion of the second layer overhangs the insulator support, such that the horizontal surface of the overhanging portion is spaced from and faces the (111) horizontal surface of the first layer. The structure further includes a nanowire column extending nearly vertically from the (111) horizontal surface to the facing horizontal surface, such that the nanowire column connects the first layer to the second layer.
摘要:
A patterned array of metallic nanostructures and fabrication thereof is described. A plurality of nanowires is grown on a substrate, the plurality of nanowires being laterally arranged on the substrate in a predetermined array pattern. The plurality of nanowires is coated with a metal to generate a plurality of metal-coated nanowires. Vacancies between the metal-coated nanowires are filled in with a sacrificial material for stabilization, and the metal-coated nanowires are planarized. The sacrificial material is removed, the patterned array of metallic nanostructures being formed by the plurality of planarized metal-coated nanowires.