Angle-dependent structural colors in a nanoscale-grating photonic crystal fabricated by reverse nanoimprint technology

Beilstein Journal of Nanotechnology

Xu Zheng^1¹ 

[1] Institue of NanoEngineering, College of Civil Engineering and Architecture, Shandong University of Science and Technology, 266590 Shandong, China^1

关键词: observation angle;    photonic crystal;    reverse nanoimprint lithography;    structural color;    visualized sensor;   

DOI  :  10.3762/bjnano.10.120

学科分类：地球科学(综合)

来源: Beilstein - Institut zur Foerderung der Chemischen Wissenschaften

【 摘 要 】

The structural color of angle-sensitive photonic crystals has attracted great interest because of a possible application in visual sensors. The appearance of a photonic crystal is mainly influenced by the optical properties, structural parameters and the observation angle. In this work, an angle-sensitive photonic crystal with nanoscale gratings was fabricated through reverse nanoimprint lithography. The periodicity and the structural color were investigated through measuring reflection spectra. The structural color of the photonic crystal has a period of 90°. Distinctive colors spanning the entire visible spectrum can be seen when the crystal is rotated. In addition, there is a blue-shift of the peak wavelength when the observation angle is increased. An equation for the observed wavelength as a function of the observation angle is proposed.

【 授权许可】

CC BY