Controlling spontaneous emission with plasmonic optical patch antennas.
نویسندگان
چکیده
We experimentally demonstrate the control of the spontaneous emission rate and the radiation pattern of colloidal quantum dots deterministically positioned in a plasmonic patch antenna. The antenna consists of a thin gold microdisk separated from a planar gold layer by a few tens of nanometers thick dielectric layer. The emitters are shown to radiate through the entire patch antenna in a highly directional and vertical radiation pattern. Strong acceleration of spontaneous emission is observed, depending on the antenna geometry. Considering the double dipole structure of the emitters, this corresponds to a Purcell factor up to 80 for dipoles perpendicular to the disk.
منابع مشابه
Probing the mechanisms of large Purcell enhancement in plasmonic nanoantennas
To move nanophotonic devices such as lasers and single-photon sources into the practical realm, a challenging list of requirements must be met, including directional emission1–5, room-temperature and broadband operation6–9, high radiative quantum efficiency1,4 and a large spontaneous emission rate7. To achieve these features simultaneously, a platform is needed for which the various decay chann...
متن کاملRadiative Enhancement of Plasmonic Nanopatch Antennas
Efficient light manipulation at subwavelength scale is of great interest for solar energy conversion, optical sensing, and nanophotonic devices. Recently, plasmonic nanopatch antennas (PNAs), which consist of plasmonic nanoparticles and metal films with thin layers of dielectric spacers sandwiched between them, have shown promise for directing and enhancing radiation from the dipole emitters at...
متن کاملEnhanced emission and light control with tapered plasmonic nanoantennas
Related Articles High-responsivity, low-noise, room-temperature, self-mixing terahertz detector realized using floating antennas on a GaN-based field-effect transistor Appl. Phys. Lett. 100, 013506 (2012) Ultra-thin plasmonic optical vortex plate based on phase discontinuities Appl. Phys. Lett. 100, 013101 (2012) A thin film broadband absorber based on multi-sized nanoantennas Appl. Phys. Lett....
متن کاملControl of radiative processes using tunable plasmonic nanopatch antennas.
The radiative processes associated with fluorophores and other radiating systems can be profoundly modified by their interaction with nanoplasmonic structures. Extreme electromagnetic environments can be created in plasmonic nanostructures or nanocavities, such as within the nanoscale gap region between two plasmonic nanoparticles, where the illuminating optical fields and the density of radiat...
متن کاملSpontaneous Hot-Electron Light Emission from Electron-Fed Optical Antennas.
Nanoscale electronics and photonics are among the most promising research areas providing functional nanocomponents for data transfer and signal processing. By adopting metal-based optical antennas as a disruptive technological vehicle, we demonstrate that these two device-generating technologies can be interfaced to create an electronically driven self-emitting unit. This nanoscale plasmonic t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Nano letters
دوره 13 4 شماره
صفحات -
تاریخ انتشار 2013