Detection of plasmon-enhanced luminescence fields from an optically manipulated pair of partially metal covered dielectric spheres.
نویسندگان
چکیده
Using optical tweezers combined with luminescence measurements we detected the optical field around two optically trapped silica microspheres partially covered by metal. By monitoring the luminescence of rhodamine 6G we were able to observe an increase of the local field intensity owing to the coupling of the local surface plasmons at the surfaces of two spheres.
منابع مشابه
Enhanced UV Emission From Silver/ZnO And Gold/ZnO Core-Shell Nanoparticles: Photoluminescence, Radioluminescence, And Optically Stimulated Luminescence
The optical properties of core-shell nanoparticles consisting of a ZnO shell grown on Ag and Au nanoparticle cores by a solution method have been investigated. Both the ZnO/Ag and ZnO/Au particles exhibit strongly enhanced near-band-edge UV emission from the ZnO when excited at 325 nm. Furthermore, the UV intensity increases with the metal nanoparticle concentration, with 60-fold and 17-fold en...
متن کاملEnhanced Raman scattering by dielectric spheres
A phenomenon of local field enhancement by dielectric spheres is reviewed. Interaction with surface plasmon polariton of metal substrate is discussed. Especially, a system of a two-dimensional array of spheres placed on a flat substrate is discussed in detail. The obtained features of the resonance modes are shown to be quite general and various possibilities for the application in non-linear o...
متن کاملMicrowave-Accelerated Plasmonics: Application to Ultra-Fast and Ultra-Sensitive Clinical Assays
In recent years our laboratory has described the favorable effects of fluorophores in close proximity to metallic nanostructures (1-6). These include, increased system quantum yields (increased detectability) and much improved fluorophore photostabilities. These effects have led to many applications of metal-enhanced fluorescence (MEF) including, improved DNA detection (7, 8), enhanced ratiomet...
متن کاملEnhancement of localized surface plasmon resonance detection by incorporating metal-dielectric double-layered subwavelength gratings.
In this study, we investigated the enhanced sensing performance of a localized surface plasmon resonance (LSPR) biosensor by employing metal-dielectric double-layered subwavelength grating structures. The numerical results showed that the LSPR substrate with a dielectric spacer can provide not only a better sensitivity but also a significantly improved reflectance characteristic. While the pres...
متن کاملUnconventional Increase in Non-Radiative Transitions in Plasmon-Enhanced Luminescence: A Distance-Dependent Coupling
We used Optically Stimulated Luminescence (OSL) from X-ray-irradiated sodium chloride nanocrystals to investigate how silver nanoparticle (AgNP) films enhanced luminescence. We controlled the emitter-AgNP distance and used the OSL intensity and decay times to explore the plasmonic interactions underlying the enhanced luminescence. Both intensity and decay times depended on the emitter-AgNP dist...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics letters
دوره 33 23 شماره
صفحات -
تاریخ انتشار 2008