| 1 | Terahertz metalens of hyper-dispersion显示文摘Chromatic optical lenses have promising applications in three-dimensional imaging, which allows fast spectral tomography without mechanical moving parts. The scanning range of current chromatic optical lenses is limited by their dispersion ability. The recent development in metasurfaces provides ideal blocks for optical wavefront manipulation and dispersion engineering of artificial materials at sub-wavelength scales. Hyper-dispersive metalenses can be realized by utilizing dispersive meta-atoms, which have enhanced dispersion compared to regular diffractive lenses. This is critical for increasing the imaging depth of fast spectral tomography. In this work, a hyper-dispersive metalens is realized with a chromatic dispersion 1.76 times greater than that of a regular diffractive metalens in the THz frequency range of 2.40–2.61 THz by simultaneously controlling the frequencydependent phase, group delay(GD), and GD dispersion of the metalens. This approach can also be extended to other optical spectra and improve the performance of spectral tomography. | Fen Zhao Ziping Li Sheng Li Xuemei Dai Yi Zhou Xiaoyu Liao JCCao Gaofeng Liang Zhengguo Shang Zhihai Zhang Zhongquan Wen Hua Li Gang Chen | 2022 | Photonics Research2022，10，4： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员