Electrically Tunable Second-Harmonic Generation in High-Q Organic DAST All-Dielectric Nonlinear Metasurfaces.

Yongjie Wang, Xiaomeng Cheng, Yarong Yang, Guanhong Li, Yu Jiang, Qiang Wang, Junchen Ke, Jinping Chen

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Article in Nanomaterials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Yongjie WangGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.

Xiaomeng ChengGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.

Yarong YangGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.

Guanhong LiGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.

Yu JiangGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.

Qiang WangGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.ORCID 0009-0008-7351-1844

Junchen KeGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.ORCID 0009-0004-3105-5167

Jinping ChenGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.ORCID 0000-0003-4733-3788

Funding

Guangxi Key Laboratory of Optoelectronic Information Processing GD24101Guangxi Natural Science Foundation 2024GXNSFBA010205Guangxi Natural Science Foundation 2024GXNSFBA010306Guangxi Science and Technology Base and Talent Special Program Guike AD25069073Undergraduate Innovation and Entrepreneurship Project 202410595002

6 · The paper itself

Abstract

Simultaneously enhancing and dynamically tuning second-harmonic generation (SHG) remains a major challenge in nanophotonics. Here, we propose a DAST-based organic all-dielectric nonlinear metasurface that combines symmetry-protected quasi-bound states in the continuum (quasi-BICs) with the strong second-order nonlinearity and electro-optic response of DAST. The quasi-BIC resonance enhances SHG efficiency by approximately 1000-fold. Applying a low voltage of 5 V significantly boosts the resonance Q-factor from 2876 to 4831. This enables an unprecedented maximum SHG conversion efficiency of 89.5% and a remarkable modulation depth of 275%. This work provides a versatile paradigm for active optical nonlinearities in organic metasurfaces, paving the way for advanced tunable nanophotonic devices.

Indexed as

DAST organic all-dielectric nonlinear metasurfaceelectrically tunable SHGhigh Qhigh SHG efficiencyquasi-bound states in the continuum

Identifiers

PMID42873019

DOI10.3390/nano16191235

PMCPMC13666763

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