Accelerated single photon emission from dye molecule-driven nanoantennas assembled on DNA

Area of Science:

• Nanophotonics
• Quantum Optics
• Materials Science

Background:

• Photon interaction with atoms is efficient at resonant frequencies.
• Nanoscale systems face limitations in light absorption, scattering, and emission due to broadening effects.
• Optical antennas can overcome impedance mismatches to enhance light-matter interactions.

Purpose of the Study:

• To enhance light-matter interactions at the nanoscale using optical antennas.
• To precisely control the position of emitters within optical antennas.
• To achieve significant enhancement in spontaneous emission rates and single-photon emission.

Main Methods:

• Utilized a DNA template to position a single dye molecule within gold particle dimers acting as optical antennas.
• Synthesized billions of target geometries in parallel.
• Measured spontaneous emission rates and single-photon emission statistics.

Main Results:

• Achieved spontaneous emission rate enhancements of up to two orders of magnitude.
• Demonstrated single-photon emission statistics.
• Quantitative agreement between experimental measurements and theoretical calculations confirmed nanometre-scale control over emitter-particle positioning.

Conclusions:

• Optical antennas enable efficient tuning of photo-physical properties of nano-objects.
• Precise engineering of the electromagnetic environment is key to controlling light-matter interactions.
• DNA-templated assembly provides a scalable method for creating functional nanoscale optical devices.