Optical nanoantennas as on-chip spectrometer: Discriminating the wavelength of infrared light
1 College of Science, Shanghai University - 200444 Shanghai, China
2 Department of Optoelectronic Technology, Nanjing University of Sciences and Technology - 210094 Nanjing, China
Received: 14 May 2015
Accepted: 30 July 2015
Based on the size-dependent resonant property of optical nanoantennas, we propose and theoretically verify that the optical detector element, which is composed of three different-size dipole nanoantennas (these antennas arrayed in the same plane look like a Yagi-Uda antenna), can discriminate the wavelength of the detected infrared light. As it behaves like a spectrometer that just needs to be laid on a micro-chip, we can refer to it as on-chip spectrometer. Such optical detector element also can be well extended to the visible-light region, and especially it can capture colour information by itself without Bayer filter.
PACS: 42.66.Lc – Vision: light detection, adaptation, and discrimination / 07.60.Dq – Photometers, radiometers, and colorimeters / 42.66.Qg – Scales for light and color detection
© EPLA, 2015