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Nanostructures hold a lot of promise in the field of optics and photonics: they provide strong control over light which usually interacts poorly with bulk materials, allowing us to mold and shape optical signals in unprecedented ways. We look at the role of nanostructures in building efficient detectors, sensors, modulators and light sources.
Graphene's exceptionally high Kerr nonlinearities can only be fully exploited by plasmonic structures, which grant up to eight orders of surface-induced nonlinear enhancement. This drives optical pump powers down to the pW levels, enabling low-powered modulation of graphene plasmons.
We report a post-growth approach to increase the radiative recombination efficiency of GaAs nanowires, beyond what has been achieved using surface passivation. This is done by coupling the nanowires to resonant plasmonic nanocavities to reduce the radiative recombination lifetime of minority carriers, thereby increasing the radiative efficiency by an order of magnitude.
A soft deposition method for incorporating surface plasmon resonant metal nanoparticles within photovoltaic devices was studied. This self-assembly method provides excellent control over both nanoparticle size and surface coverage. Films of spherical Ag nanoparticles with diameter of ∼100nm were fabricated by depositing size-selected aerosols on various substrates using electrophoresis. This novel...
Plasmonic nano-antennas constructed by placing a sub-wavelength dielectric (e.g., air) gap between two metallic regions can generate high intense electric fields in small regions which can be used to excite nonlinear effects such as the Surface Enhanced Raman Scattering or to visualize nano-particles. However, since nano-antennas are passive devices, they need to be driven by external light sources...
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