Interface Control of Second-Harmonic Generation in Layered CuInP2S6 via PbZr0.2Ti0.8O3 Domain Wall

Abstract

The control of nonlinear optical responses in van der Waals ferroelectrics at the nanoscale offers opportunities for developing two-dimensional integrated nanophotonics with programmable functionalities. In this work, we report the first realization of nanoscale nonvolatile control of the amplitude and polarization of second-harmonic generation (SHG) response in layered CuInP2S6 (CIPS) via the domain structure in an interfacial PbZr0.2Ti0.8O3 (PZT) thin film. The SHG intensity at CIPS/PZT heterointerface is continuously modulated, either substantially enhanced or almost entirely quenched, by the circular domain walls in underlying ferroelectric oxide. The interfacial coupling of CIPS polar axis with in-plane polarization of PZT domain walls tailors the SHG light polarization into two-fold (C2V) symmetry, which is well modeled by nonlinear electromagnetic theory. Overall, this study enables nonvolatile programmable design of nonlinear light intensity and polarization in van der Waals ferroelectrics at the nanoscale.

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BibTeX RIS

BibTeX

@misc{li2026interface,
  title = {{Interface Control of Second-Harmonic Generation in Layered CuInP2S6 via PbZr0.2Ti0.8O3 Domain Wall}},
  author = {Dawei Li and Juhe Liu and Yifei Hao and Qiuchen Wu and Xi Huang and Jesse Stebbing and Xinyi Hou and Gaolei Zhao and Kun Wang and Yongfeng Lu and Xia Hong},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.32228},
  eprint = {2610.32228},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.32228},
  note = {CC BY-NC-ND 4.0},
}

RIS

TY  - UNPB
TI  - Interface Control of Second-Harmonic Generation in Layered CuInP2S6 via PbZr0.2Ti0.8O3 Domain Wall
AU  - Dawei Li
AU  - Juhe Liu
AU  - Yifei Hao
AU  - Qiuchen Wu
AU  - Xi Huang
AU  - Jesse Stebbing
AU  - Xinyi Hou
AU  - Gaolei Zhao
AU  - Kun Wang
AU  - Yongfeng Lu
AU  - Xia Hong
PY  - 2026
DA  - 2026/10/23
PB  - arXiv
DO  - 10.48550/arxiv.2610.32228
UR  - https://arxiv.org/abs/2610.32228
AB  - The control of nonlinear optical responses in van der Waals ferroelectrics at the nanoscale offers opportunities for developing two-dimensional integrated nanophotonics with programmable functionalities. In this work, we report the first realization of nanoscale nonvolatile control of the amplitude and polarization of second-harmonic generation (SHG) response in layered CuInP2S6 (CIPS) via the domain structure in an interfacial PbZr0.2Ti0.8O3 (PZT) thin film. The SHG intensity at CIPS/PZT heterointerface is continuously modulated, either substantially enhanced or almost entirely quenched, by the circular domain walls in underlying ferroelectric oxide. The interfacial coupling of CIPS polar axis with in-plane polarization of PZT domain walls tailors the SHG light polarization into two-fold (C2V) symmetry, which is well modeled by nonlinear electromagnetic theory. Overall, this study enables nonvolatile programmable design of nonlinear light intensity and polarization in van der Waals ferroelectrics at the nanoscale.
ER  -

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