摘要:
A sensing device that produces a Raman signal includes micro-rods or nano-rods arranged on a substrate in a two-dimensional (2D) array, each of the rods having a length in a single row being substantially the same, with the rod length of each row being different from the rod length of each other row. Each row of rods has a respective resonant vibration frequency that varies from row to row. A source of vibration energy, operatively connected to the substrate, excites vibration in each of the rods such that a responding row resonates when an exciting frequency approaches the resonant vibration frequency of the responding row. A method includes exposing the 2D array to a light source and analyzing Raman scattering at each rod of the 2D array to render a Raman map.
摘要:
Structures for amplifying light include a resonant cavity in which an analyte may be positioned. The structures for amplifying light may be used to amplify the incident light employed in surface enhanced Raman spectroscopy (SERS). SERS systems employing the structures for amplifying light of the present invention and methods of performing SERS are also disclosed.
摘要:
For manipulation of a specimen, the specimen and a focusing location of a composite material lens are brought into spatial coincidence. The composite material lens has at least one of a negative effective permittivity and a negative effective permeability at a frequency of an applied light beam. The composite material lens focuses the light beam toward the focusing location and forms an optical trap for the specimen.
摘要:
Devices, systems, and methods using Surface Enhanced Raman Spectroscopy (SERS) are disclosed. A device for generating Raman scattered radiation comprises a laser source and a SERS-active structure. The laser source may be configured for emanating radiation from an emanating surface or by forming a depression in the laser source, which creates a region of increased evanescent field from the laser source. SERS systems and methods include a device for generating Raman scattered radiation with a detector configured to receive the Raman scattered radiation.
摘要:
Structures for amplifying light include a resonant cavity in which an analyte may be positioned. The structures for amplifying light may be used to amplify the incident light employed in surface enhanced Raman spectroscopy (SERS). SERS systems employing the structures for amplifying light of the present invention and methods of performing SERS are also disclosed.
摘要:
Wavelength-tunable radiation amplifying structures for Raman spectroscopy are disclosed that include resonant cavities having Raman signal-enhancing structures disposed therein. Systems that include the amplifying structures and methods of performing spectroscopic analysis using the structures and systems are also disclosed.
摘要:
A memristor includes a first electrode of a nanoscale width; a second electrode of a nanoscale width; and an active region disposed between the first and second electrodes. The active region has a both a non-conducting portion and a source of dopants portion induced by electric field. The non-conducting portion comprises an electronically semiconducting or nominally insulating material and a weak ionic conductor switching material capable of carrying a species of dopants and transporting the dopants under an electric field. The non-conducting portion is in contact with the first electrode and the source of dopants portion is in contact with the second electrode. The second electrode comprises a metal reservoir for the dopants. A crossbar array comprising a plurality of the nanoscale switching devices is also provided. A process for making at least one nanoscale switching device is further provided.
摘要:
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.
摘要:
A light amplifying device for surface enhanced Raman spectroscopy is disclosed herein. The device includes a dielectric layer having two opposed surfaces. A refractive index of the dielectric layer is higher than a refractive index of a material or environment directly adjacent thereto. At least one opening is formed in one of the two opposed surfaces of the dielectric layer, and at least one nano-antenna is established on the one of the two opposed surfaces of the dielectric layer. A gain region is positioned in the dielectric layer or adjacent to another of the two opposed surfaces of the dielectric layer.
摘要:
A sensing device that produces a Raman signal includes micro-rods or nano-rods arranged on a substrate in a two-dimensional (2D) array, each of the rods having a length in a single row being substantially the same, with the rod length of each row being different from the rod length of each other row. Each row of rods has a respective resonant vibration frequency that varies from row to row. A source of vibration energy, operatively connected to the substrate, excites vibration in each of the rods such that a responding row resonates when an exciting frequency approaches the resonant vibration frequency of the responding row. A method includes exposing the 2D array to a light source and analyzing Raman scattering at each rod of the 2D array to render a Raman map.