Two-Color Metal-Enhanced Fluorescence Using Gold Slotted Nanogratings

Hure, Robert; Simoneau, Samuel; Chandler, Bert D.; Steele, Jennifer M.

doi:10.1007/s11468-016-0426-8

Cited by 1 publication

(3 citation statements)

References 29 publications

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“…This has the effect of increasing the emission. These two mechanisms have been well documented experimentally for nanoparticles , and structured metal surfaces. , …”

Section: Introductionmentioning

confidence: 81%

“…For the second mechanism, excited fluorophores may channel their energy into a surface plasmon excitation. This energy can couple back out of the nanograting as photons, and the light will beam out at an angle determined by the wavelength of the plasmon. ,, By sweeping a detector at various angles around the grating, fluorescence from the second mechanism can be isolated. By measuring the fluorescence emission as a function of detector angle we can effectively track the effect on the emission and FRET efficiency as the surface plasmon wavelength shifts through both the donor and acceptor emission spectra, changing the LDOS.…”

Section: Introductionmentioning

confidence: 99%

“…These two mechanisms have been well documented experimentally for nanoparticles 8,13 and structured metal surfaces. 14,15 Applying MEF to FRET has many potential advantages, chief of which is the ability to enhance the energy transfer rate. The number of systems that FRET can be applied to is limited by the Forster radius, R 0 , defined as the distance between the donor and acceptor molecule where the energy transfer probability is 50%.…”

Section: ■ Introductionmentioning

confidence: 99%

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Controlling FRET Enhancement Using Plasmon Modes on Gold Nanogratings

2017

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The optical properties of structured metal surfaces and nanoparticles can be engineered to influence the fluorescence properties of nearby quantum emitters through the manipulation of the local density of optical states (LDOS). Applying these techniques to Förster resonance energy transfer (FRET) is appealing but has proven to be a complicated and debated issue. In this paper, surface plasmons modes for a gold nanograting are found to enhance the FRET efficiency between nearby donor and acceptor molecules. Nanogratings support traveling surface plasmon waves with a broad range of wavelengths that follow a dispersion relationship, allowing for increases in the LDOS at targeted portions of the spectra of FRET paired molecules. Nearby excited fluorescent molecules may decay by launching a surface plasmon wave that couples into free-space light, which can be recovered. With this system, we measured the FRET efficiency for different plasmon wavelengths spanning both the donor and acceptor emission spectra. The increase in efficiency was found to be greatest when the surface plasmon modes, and therefore the increase in LDOS, overlapped the acceptor emission spectrum.

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“…This has the effect of increasing the emission. These two mechanisms have been well documented experimentally for nanoparticles , and structured metal surfaces. , …”

Section: Introductionmentioning

confidence: 81%