{"id":320626,"date":"2023-12-03T21:27:35","date_gmt":"2023-12-03T21:27:35","guid":{"rendered":"\/forum\/forums\/topic\/fdtd-7\/"},"modified":"2023-12-03T21:27:35","modified_gmt":"2023-12-03T21:27:35","slug":"fdtd-7","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fdtd-7\/","title":{"rendered":"FDTD"},"content":{"rendered":"

 I am using MoS2 and WS2 vertical heterojunction for my simulation. I am using TSFS source. I took refractive index from<\/p>\n

Refractiveindex.info. As my both layers are 6nm thick I am using refractive index as below<\/p>\n

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WS2<\/strong>
  Vyshnevyy et al. 2023: n,k(o) 0.36–1.70 µm Vyshnevyy et al. 2023: n,k(e) 0.36–1.70 µm   Jung et al. 2019: monolayer film; n,k 0.38–0.89 µm Ermolaev et al. 2020: monolayer film; n,k 0.365–1.70 µm Hsu et al. 2019: monolayer (1L) film; n,k 0.40–0.85 µm Hsu et al. 2019: 2-layer (2L) film; n,k 0.40–0.85 µm Hsu et al. 2019: 3-layer (3L) film; n,k 0.40–0.85 µm   Munkhbat et al. 2022: multilayer flakes; n(o),k 0.30–1.69 µm Munkhbat et al. 2022: multilayer flakes; n(e) 0.30–1.69 µm  <\/p>\n<\/div>\n

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Optical constants of WS2<\/sub> (Tungsten disulfide)<\/h2>\n<\/section>\n
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MoS2<\/strong>
  Beal and Huges 1979: bulk; n,k 0.081–1.24 µm Ermolaev et al. 2020: bulk; n(o),k 0.290–3.30 µm Ermolaev et al. 2021: bulk; n(e) 0.360–1.70 µm Song et al. 2019: bulk; n,k 0.193–1.69 µm   Yim et al. 2014: 2-nm film; n,k 0.38–0.90 µm Yim et al. 2014: 3-nm film; n,k 0.38–0.90 µm Yim et al. 2014: 20-nm film; n,k 0.38–0.90 µm Islam et al. 2021: 33.5-nm film; n,k(o) 0.190–1.70 µm Islam et al. 2021: 33.5-nm film; n(e) 0.954–1.70 µm   Munkhbat et al. 2022: multilayer flakes; n(o),k 0.30–1.69 µm Munkhbat et al. 2022: multilayer flakes; n(e) 0.30–1.69 µm   Zhang et al. 2015: monolayer (1L) film; n,k 0.40–0.75 µm Islam et al. 2021: monolayer (1L) film; n,k 0.190–1.70 µm Islam et al. 2021: few-layer (2.15 nm) film; n,k 0.190–1.70 µm Ermolaev et al. 2020: monolayer (1L) film; n,k 0.290–3.30 µm Hsu et al. 2019: monolayer (1L) film; n,k 0.40–0.86 µm Hsu et al. 2019: 2-layer (2L) film; n,k 0.40–0.86 µm Hsu et al. 2019: 3-layer (3L) film; n,k 0.40–0.86 µm Song et al. 2019: monolayer (1L) film; n,k 0.193–1.69 µm Song et al. 2019: 3-layer (3L) film; n,k 0.193–1.69 µm Song et al. 2019: 4-layer (4L) film; n,k 0.193–1.69 µm Song et al. 2019: 6-layer (6L) film; n,k 0.193–1.69 µm Song et al. 2019: 8-layer (8L) film; n,k 0.193–1.69 µm Song et al. 2019: 10-layer (10L) film; n,k 0.193–1.69 µm Song et al. 2019: 13-layer (13L) film; n,k 0.193–1.69 µm Jung et al. 2019: monolayer (1L) film; n,k 0.38–0.89 µm <\/p>\n<\/div>\n

. After simulating I am getting almost zero power at around 600nm wavelength. (Picture attached). I am using two  generation rate window for the simulation. I also tried using one generation rate window at a time by deactivating one layer weather MoS2 or WS2. Am I doing something wrong? Could you please give suggestions to improve.<\/p>\n

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