Pengtao Fan, Huangjie Zhang, Xilan Wang, Chenyuan Chen, Haotian Yan, Ran Hao. On‑Chip Coupled Waveguides for Generation of Ultra‑Broadband Entangled Photons[J]. Chinese Journal of Lasers, 2025, 52(3): 0312001
- Chinese Journal of Lasers
- Vol. 52, Issue 3, 0312001 (2025)
Fig. 1. Schematic of coupled waveguide system and E z distributions under two modes. (a) Schematic of system; (b) E z distributions
Fig. 2. Results under TE mode. (a) Momentum mismatch and phase compensation; (b) phase-matched bands; (c) spectral function; (d) conversion efficiency of FWM
Fig. 3. Flowchart of simulated annealing algorithm
Fig. 4. Simulated annealing optimization process. (a) Acceptance curve with iteration process of optimal value shown in inset; (b) comparison of phase matching before and after optimization; (c) comparison of spectral function
Fig. 5. Impact of propagation length on conversion efficiency. (a) Variation of FWM conversion efficiency with propagation distance; (b) FWM conversion efficiencies at propagation lengths of 3 mm and 5 mm
Fig. 6. Sensitivity analysis. (a) Parameters w and g; (b) parameter h
Fig. 7. Entanglement analysis result and photon flux density spectrum. (a) Schmidt coefficient with two-photon wave function for generation of photon pairs shown in inset; (b) photon flux density
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Table 1. Comparison of different works
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