37 results about "Plasmon excitation" patented technology

The invention provides new types of plasmon-driven growth mechanism for silver nanostructures involving the fusion of triangular nanoprisms. This mechanism, which is plasmon excitation-driven and highly cooperative, produces bimodal particle size distributions. In these methods, the growth process can be selectively switched between bimodal and unimodal distributions using dual beam illumination of the nanoparticles. This type of cooperative photo-control over nanostructure growth enables synthesis of monodisperse nanoprisms with a preselected edge length in the 30–120 nm range simply by using one beam to turn off bimodal growth and the other (varied over the 450–700 nm range) for controlling particle size.

The present disclosures are provided with: a lightbulb unit (10) that has a substrate (22) that transmits light from a plurality of optical connection mechanisms (23) that switch the transmission and the blocking of light from a light-emitting element (25); and a plasmon coupling unit (11) that generates plasmon coupling by means of light entering from the light-emitting element (25) and that is disposed within the lightbulb unit (10). The plasmon coupling unit (11) has: a carrier generation layer (15) wherein a carrier is generated by means of light entering from the light-emitting element (25); and a plasmon excitation layer (17) that has a higher plasma frequency than the frequency of light arising when exciting the carrier generation layer (15) with the light of the light-emitting element (25). A wavevector conversion layer (19) that converts surface plasmons or light generated by the plasmon excitation layer (17) into light at a predetermined angle of emergence, and then radiates said light is provided on a substrate (22). The plasmon excitation layer (17) is sandwiched between a first dielectric layer (16) and a second dielectric layer (18).

The invention discloses a plasmon resonant wavelength division multiplexer which is composed of a metal film, one incident waveguide, more than two output waveguides and more than two resonant cavities. The incident waveguide, the output waveguides and resonant cavities are formed in the metal film in a hollowed way, the amount of the output waveguides is the same with that of the resonant cavities, and one output waveguide corresponds to one resonant cavity. The resonant cavities are arranged in the two sides and / or rear end of the incident waveguide and the output waveguides are arranged inthe other side of the resonant cavities to form the multiplexer, one metal film is additionally arranged in the internal of each resonant cavity so that the internal of the resonant cavity can form anF-P cavity, and surface plasmon SPP and the resonant cavities realize resonant coupling; thus, a resonant coupling effect between the surface plasmon SPP and the resonant cavities is utilized, and the sizes of the metal films in the resonant cavities are adjusted to separate multiple paths of plasmon signals and adjust the wavelengths of different channels; and the coupling distance can be changed to realize a specific coupling effect.