Strongly chiral correlated second-order nonlinear optical effects in two-dimensional van der Waals In<sub>4/3</sub>P<sub>2</sub>Se<sub>6</sub> nanosheets
We report a novel, to our knowledge, two-dimensional (2D) material, In<sub>4/3</sub>P<sub>2</sub>Se<sub>6</sub>, synthesized by the chemical vapor transport (CVT). Under 1064 nm laser excitation, In<sub>4/3</sub>P<sub>2</sub>Se<sub>6</sub> exhibits exceptional second-harmonic generation (SHG) intensity twice that of monolayer molybdenum disulfide (MoS<sub>2</sub>). Furthermore, its intrinsic chirality and asymmetric centers facilitate strong interactions with circularly polarized light (CPL), resulting in pronounced second-harmonic generation circular dichroism (SHG-CD). At a thickness of 55 nm, the SHG-CD anisotropy factor reaches 0.639. The tunable nonlinear geometrical phase in this material presents new opportunities for next-generation nonlinear photonic devices.
Authors
- Weiping Wu (ORCID: https://orcid.org/0000-0003-1462-6402)
- Fenghua Liu (ORCID: https://orcid.org/0000-0002-4987-5188)
- Xiaoman Li (ORCID: https://orcid.org/0000-0002-6011-382X)
- Handong Wang (ORCID: https://orcid.org/0000-0001-5989-9338)
- Yue Wang (ORCID: https://orcid.org/0009-0007-0186-7836)
- Chenlu Mao (ORCID: https://orcid.org/0009-0001-0385-738X)
Institutions
- Shanghai University (CN)
- University of Electronic Science and Technology of China (CN)
- Chinese Academy of Sciences (CN)
- National Engineering Research Center of Electromagnetic Radiation Control Materials (CN)
- Shanghai Institute of Optics and Fine Mechanics (CN)
Publication Details
- Journal
- Optics Letters
- Published
- 2025-08-08
- DOI
- https://doi.org/10.1364/ol.571206
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00