1State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an 710119, China
2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
Fig. 2. (a) SPRS structural parameters and working principle; bilevel taper simulations and light-field diagrams of (b) TE and (c) TM; (d) bilevel taper loss at different slab widths (TE); (e) bilevel taper loss at different slab widths (TM).
Fig. 3. (a) SPRS simulation results and light-field diagram (TE); (b) SPRS simulation results and light-field diagram (TM); (c) SPRS loss at different slab thicknesses, and the spectroscopic ratio of port 1 and port 2 (TE); (d) SPRS loss at different slab thicknesses, and the spectroscopic ratio of port 1 and port 2 (TM); (e) reflection scene at Wg; (f) loss of Y-branches at different linewidths of Wg (TE); (g) loss of Y-branches at different linewidths of Wg (TM).
Fig. 4. Microscope scan of the device (a) with TE grating input and TM grating output; (b) with TM grating input and TE grating output; (c) with TE grating input and TE grating output; (d) with TM grating input and TM grating output; reference grating of (e) TE and (f) TM.
Fig. 5. (a) IL of TE–TE and PER of TE–TM; (b) IL of TM–TM and PER of TM–TE; (c) IL of TE–TM and PER of TE–TE; (d) IL of TM–TE and PER of TM–TM; voltage sweep curve of the devices with the reference gratings of (e) TE–TE; (f) TM–TM; (g) TE–TM; and (h) TM–TE.