Nanoaperture Fluorescence Enhancement in the Ultraviolet

作者：Mahdavi Farhad; Blair Steve^*

来源：Plasmonics, 2010, 5(2): 169-174.

DOI：10.1007/s11468-010-9126-y

• Fluorescence
• Surface plasmons
• Nanoapertures
• Tryptophan

We study fluorescence excitation and emission enhancement in the ultraviolet regime for molecules confined within sub-wavelength metal apertures. Calculations are performed across a range of excitation wavelengths for individual apertures constructed in gold, silver, and aluminum. As expected, enhancement in the ultraviolet is greatest with aluminum. Using excitation and emission wavelengths appropriate for tryptophan, we find that more than 10x net increase in fluorescence count rate should be obtainable for aluminum apertures of similar to 75 nm diameter. These results suggest that many applications utilizing native protein fluorescence could become practical, even to the single molecule level.

• 出版日期2010-6