Enhanced Light Interaction with Organic Molecules in Photonic Crystal Slabs

Applications

Several applications for this technology are found in molecular sensing and detection as well as organic light emitting devices.

Problem Addressed

Currently, the incorporation of organic molecules in optical cavities is challenging and often impossible due to the incompatible fabrication processing with the typically inorganic cavity structure.

Technology

This invention depicts a system for stimulating an emission from at least one emitter, such as a quantum dot or organic molecule, on the surface of a photonic crystal comprising a dielectric substrate. This system includes a laser or other source that illuminates the emitter and the photonic crystal, which is characterized by an energy band structure exhibiting a Fano resonance, from a first angle so as to stimulate the emission from the emitter at a second angle. The coupling between the photonic crystal and the emitter may result in spectral and angular enhancement of the emission through excitation and extraction enhancement. These enhancement mechanisms also reduce the emitter's lasing threshold.

Advantages

  • Ability to create more efficient organic light emitting devices
  • A more sensitive molecular sensing