Science Daily September 23, 2019
To harness light’s energy into nanoscale volumes one must overcome the diffraction limit. Researchers at the University of Illinois overcame this hurdle by coupling photonic crystals with a plasmonic nanoantenna. The photonic crystals serve as light receivers and focus the energy into an electromagnetic field that is hundreds of times greater than that received from the original light source, such as an LED or laser. The nanoantennas, when “tuned” to the same wavelength, absorb the energy from the electromagnetic field and concentrate the energy into a smaller volume that is of greater intensity by yet another two orders of magnitude. The hybrid resonance is continuously tunable over a broad spectral range by scanning of the incidence angle. The system opens new opportunities to boost a wealth of applications including ultrasensitive molecular spectroscopy, plasmonic hot carrier chemistry, thermoplasmonic, spontaneous emission enhancement, nanolasers, and many more…read more. TECHNICAL ARTICLE
New framework for nanoantenna light absorption
Posted in Nanoantenna and tagged Diffraction limit.