RESUMEN
We report the design of an integrated platform for on-chip electrical transduction of the surface plasmon resonance supported by a nanostructured metal grating. The latter is fabricated on the active area of a GaAs/AlGaAs photo-HEMT and simultaneously works as the electronic gate of the device. The gold plasmonic crystal has a V-groove profile and has been designed by numerical optical simulations. By showing that the numerical models accurately reproduce the phototransistors experimental response, we demonstrate that the proposed architecture is suitable for the development of a new class of compact and scalable SPR sensors.
Asunto(s)
Fotoquímica/métodos , Resonancia por Plasmón de Superficie/instrumentación , Algoritmos , Anisotropía , Técnicas Biosensibles , Simulación por Computador , Electroquímica , Electrones , Diseño de Equipo , Oro/química , Metales/química , Nanoestructuras/química , Nanotecnología/instrumentación , Óptica y Fotónica , Semiconductores , Transistores ElectrónicosRESUMEN
The integration of a plasmonic lamellar grating in a heterostructure organic solar cell as a light trapping mechanism is investigated with numerical Finite Elements simulations. A global optimization of all the geometric parameters has been performed. The obtained wide-band enhancement in optical absorption is correlated with both the propagating and the localized plasmonic modes of the structure, which have been identified and characterized in detail.