title: Generalized synthesis of hybrid metal-semiconductor nanostructures tunable from the visible to the infrared.
abstract: Hybrid superstructures allow a convenient route to the development of materials with multiple functionalities (e.g., sensor, marker, conductor) out of monofunctional (e.g., excitonic, plasmonic) building blocks. This work describes a general synthetic route to the preparation of metal|dielectric|quantum dot hybrid superstructures that have excitonic and plasmonic resonances independently tunable from the ultraviolet to the mid-infrared spectral region. We demonstrate that structural tuning can be used to control intercomponent coupling leading to the emergence of unique optical properties. We illustrate this capability by demonstrating single- and multicolor emission from coupled systems, and a significant enhancement of two-photon absorption cross sections of quantum dots. Such properties in a robust yet dispersible particle can be useful in a number of applications including bioimaging and microscopy, and in optoelectronic devices, as well as serve as a platform for fundamental studies of metal-semiconductor interactions.
authors.affiliation: Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Bishnu P
authors.initials: BP
authors.lastname: Khanal
authors.forename: Anshu
authors.initials: A
authors.lastname: Pandey
authors.forename: Liang
authors.initials: L
authors.lastname: Li
authors.forename: Qianglu
authors.initials: Q
authors.lastname: Lin
authors.forename: Wan Ki
authors.initials: WK
authors.lastname: Bae
authors.forename: Hongmei
authors.initials: H
authors.lastname: Luo
authors.forename: Victor I
authors.initials: VI
authors.lastname: Klimov
authors.forename: Jeffrey M
authors.initials: JM
authors.lastname: Pietryga