Photonics Research, Volume. 8, Issue 6, 875(2020)
Dynamic Airy imaging through high-efficiency broadband phase microelements by femtosecond laser direct writing
Fig. 1. Symmetric and asymmetric Airy beams and their dynamic imaging of a letter “T”. (a1) Cubic phase mask. (a2) Intensity distribution of the corresponding 2D Airy beam at the Fourier plane. (a3) Propagation dynamic of the Airy beam versus
Fig. 2. Femtosecond laser two-photon polymerization of symmetric and asymmetric cubic phase microplates. (a) Schematic illustration of the fabrication of SCPP and ACPP. (b) Image of the designed SCPP according to the phase mask by converting the phase to the corresponding height and discretization with a step of 100 nm. (c) SEM and AFM micrographs (half of the image) of the fabricated SCPP. (d) Height profiles of the desired, designed, and fabricated SCPP along the dashed lines in (b) and (c). (e), (f) Top-view SEM and three-dimensional AFM images of the fabricated ACPP.
Fig. 3. Generation of symmetric and asymmetric Airy beams. (a) Schematic of the experimental setup for generating and observing SAB and AAB. (b1)–(b2) Intensity distribution of the (b1) SAB and (b2) AAB generated by the fabricated phase plates at the propagation planes
Fig. 4. Broadband generation of symmetric and asymmetric Airy beams. (a) Experimentally measured intensity profiles and optical efficiency of the generated SAB and AAB over a broadband illumination from 405 to 780 nm. All the intensity profiles are captured at
Fig. 5. Dynamic imaging by symmetric and asymmetric Airy beams. (a) Schematic illustration for the characterization of dynamic Airy imaging. (b1), (b2) Imaging results of letter “T” at different propagation planes via the (b1) SAB and (b2) AAB at 532 nm. Different imaging results are exhibited at different propagation planes by the SAB and AAB. (c1) A square shows various imaging results at different propagation planes via the SAB at 633 nm, the initial shape “square” (Chinese character “�?�”) at
Fig. 6. Flexibility and robustness of the symmetric cubic phase during mechanical stretch. (a) The length and width of the SCPP on a PDMS substrate almost remain unchanged during the stretch coefficient in the
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Ze Cai, Xinbo Qi, Deng Pan, Shengyun Ji, Jincheng Ni, Zhaoxin Lao, Chen Xin, Jiawen Li, Yanlei Hu, Dong Wu, Jiaru Chu, "Dynamic Airy imaging through high-efficiency broadband phase microelements by femtosecond laser direct writing," Photonics Res. 8, 875 (2020)
Category: Optical Devices
Received: Jan. 6, 2020
Accepted: Mar. 30, 2020
Published Online: May. 9, 2020
The Author Email: Jiawen Li (jwl@ustc.edu.cn), Dong Wu (dongwu@ustc.edu.cn)