Nanoantennas directing a bright future

Nanowerk  December 21, 2022 Phosphor plates combined with nanoantenna, enable spatial and spectral control over luminescence. While the emission enhancement in a specific direction has been reported in nanoantenna studies, the evaluation of the total distribution of radiation as well as the conversion efficiency is largely missing. An international team of researchers (Japan, China) developed nanoantenna phosphors consist of a hexagonal array of titanium dioxide (TiO2) nanoparticles, fabricated on a phosphor plate of yttrium aluminum garnet doped with Ce3+ (YAG:Ce). They visualized the distribution of photoluminescence from the nanoantenna phosphor into forward, backward, and side directions by using an integrating […]

New framework for nanoantenna light absorption

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 […]