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• W2058199510 abstract "There is a continuing need to increase the brightness and photostability of fluorophores for use in biotechnology, medical diagnostics, and cell imaging. One approach developed during the past decade is to use metallic surfaces and nanostructures. It is now known that excited state fluorophores display interactions with surface plasmons, which can increase the radiative decay rates, modify the spatial distribution of emission, and result in directional emission. One important example is surface plasmon-coupled emission (SPCE). In this phenomenon, the fluorophores at close distances from a thin metal film, typically silver, display emission over a small range of angles into the substrate. A disadvantage of SPCE is that the emission occurs at large angles relative to the surface normal and at angles that are larger than the critical angle for the glass substrate. The large angles make it difficult to collect all of the coupled emission and have prevented the use of SPCE with high-throughput and/or array applications. In the current article, we describe a simple multilayer metal–dielectric structure that allows excitation with light that is perpendicular (normal) to the plane and provides emission within a narrow angular distribution that is normal to the plane. This structure consists of a thin silver film on top of a multilayer dielectric Bragg grating, with no nanoscale features except for the metal or dielectric layer thicknesses. Our structure is designed to support optical Tamm states, which are trapped electromagnetic modes between the metal film and the underlying Bragg grating. We used simulations with the transfer matrix method to understand the optical properties of Tamm states and localization of the modes or electric fields in the structure. Tamm states can exist with zero in-plane wavevector components and can be created without the use of a coupling prism. We show that fluorophores on top of the metal film can interact with the Tamm state under the metal film and display Tamm state-coupled emission (TSCE). In contrast to SPCE, the Tamm states can display either S or P polarization. The TSCE angle is highly sensitive to wavelength, which suggests the use of Tamm structures to provide both directional emission and wavelength dispersion. Metallic structures can modify fluorophore decay rates but also have high losses. Photonic crystals have low losses but may lack the enhanced light-induced fields near metals. The combination of plasmonic and photonic structures offers the opportunity for radiative decay engineering to design new formats for clinical testing and other fluorescence-based applications." @default.
• W2058199510 created "2016-06-24" @default.
• W2058199510 creator A5038945633 @default.
• W2058199510 creator A5074798370 @default.
• W2058199510 creator A5076084475 @default.
• W2058199510 date "2014-01-01" @default.
• W2058199510 modified "2023-10-15" @default.
• W2058199510 title "Radiative decay engineering 7: Tamm state-coupled emission using a hybrid plasmonic–photonic structure" @default.
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• W2058199510 doi "https://doi.org/10.1016/j.ab.2013.10.009" @default.
• W2058199510 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4127489" @default.
• W2058199510 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24135654" @default.
• W2058199510 hasPublicationYear "2014" @default.
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