Main > Advanced Photonics >  Volume 2 >  Issue 3 >  Page 036002 > Article
  • Abstract
  • Abstract
  • Figures (4)
  • Tables (0)
  • Equations (2)
  • References (51)
  • Suppl. Mat.
  • Get PDF
  • View Full Text
  • Paper Information
  • Received: Apr. 3, 2020

    Accepted: Apr. 29, 2020

    Posted: May. 22, 2020

    Published Online: May. 13, 2020

    The Author Email: Shen Zhixiong (njuzxshen@163.com), Zhou Shenghang (njuzsh@163.com), Li Xinan (1491536582@qq.com), Ge Shijun (geshijun@nju.edu.cn), Chen Peng (chenpeng@nju.edu.cn), Hu Wei (huwei@nju.edu.cn), Lu Yanqing (yqlu@nju.edu.cn)

    DOI: 10.1117/1.AP.2.3.036002

  • Get Citation
  • Copy Citation Text

    Zhixiong Shen, Shenghang Zhou, Xinan Li, Shijun Ge, Peng Chen, Wei Hu, Yanqing Lu. Liquid crystal integrated metalens with tunable chromatic aberration[J]. Advanced Photonics, 2020, 2(3): 036002

    Download Citation

  • Category
  • Research Articles
  • Share
Advanced Photonics, Vol. 2, Issue 3, 036002 (2020)

Liquid crystal integrated metalens with tunable chromatic aberration

Zhixiong Shen1,2, Shenghang Zhou1, Xinan Li1, Shijun Ge1,2, Peng Chen1,2, Wei Hu1,2,*, and Yanqing Lu1,*

Author Affiliations

  • 1Nanjing University, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation, Collaborative Innovation Center of Advanced Microstructures, Nanjing, China
  • 2Jiangsu Industrial Technology Research Institute, Institute for Smart Liquid Crystals, Changshu, China

Abstract

Overcoming chromatic aberrations is a vital concern in imaging systems in order to facilitate full-color and hyperspectral imaging. By contrast, large dispersion holds opportunities for spectroscopy and tomography. Combining both functions into a single component will significantly enhance its versatility. A strategy is proposed to delicately integrate two lenses with a static resonant phase and a switchable geometric phase separately. The former is a metasurface lens with a linear phase dispersion. The latter is composed of liquid crystals (LCs) with space-variant orientations with a phase profile that is frequency independent. By this means, a broadband achromatic focusing from 0.9 to 1.4 THz is revealed. When a saturated bias is applied on LCs, the geometric phase modulation vanishes, leaving only the resonant phase of the metalens. Correspondingly, the device changes from achromatic to dispersive. Furthermore, a metadeflector with tunable dispersion is demonstrated to verify the universality of the proposed method. Our work may pave a way toward active metaoptics, promoting various imaging applications.

keywords

Please Enter Your Email: