New Technology Creates Rainbow from Nanoscale Photons—Successful Development of Photon Nanoantennas Used for Color Sorting

Research Press Release | October 19, 2015

Press Release
Key Points ・We developed the technology of photon nanoconcentration using gold nanoantennas to localize photons to nanosize.
・We successfully carried out a nano rainbow generation experiment using colors to shift the position of photon collector nanospots.
・We developed the technology of nanoimaging that can observe rainbow images at 0.0001 mm scale.
・The results of this study will contribute to the development of ultra-fine color picture elements, wavelength division multiplexing devices and biosensors.
Overview We successfully developed a highly-precision light processor that uses specially fabricated gold nanostructures (nanoantennas) to localize incoming photons to 0.0001 mm scale and then uses color to shift the position of photon collector nanospots and create a nanosized rainbow. Our experiment was the first of its kind to be successful. In addition we developed a very high resolution imaging system with resolution down to several nanometers, for the purpose of observing images of the nanosized rainbow. The findings from this study have important implications for ultra-compact color image sensors, optical integrated circuit devices for super-fast high-capacity wavelength division multiplexing, super-sensitive biochemical sensors, and nanoscale optical manipulation technology for manipulating nanoparticles at will.

Keiji SASAKI, Professor, Research Institute for Electronic Science, Hokkaido University

Tel: +81-11-706-9396

E-mail: sasaki[at]

Japanese Link ナノサイズの光で虹を作る技術を開発~ 色が分類できる光ナノアンテナの開発に成功 ~ (2015.10.5)

Nanoscale Color Sorting of Surface Plasmons in a Double-Nanogap Structure with Multipolar Plasmon Excitation, Yoshito Y. Tanaka, Masaya Komatsu, Hideki Fujiwara, and Keiji Sasaki;

Nano Letter. 2015 Oct 14; 15(10): 7086-90. DOI: 10.1021/acs.nanolett.5b03147.