Octave-spanning supercontinuum generation from sub-millimeter-length integrated gallium phosphide waveguides.

Xucheng Zhang, Weiren Cheng, Chunxue Wang, Ning Ding, Qiancheng Zhao, Yikai Su, Xingchen Ji

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Article in Nature communications, 2025. 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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7 authors.

Xucheng ZhangState Key Laboratory of Photonics and Communications, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China.

Weiren ChengSchool of Microelectronics, Southern University of Science and Technology, Shenzhen, Guangdong, China.

Chunxue WangState Key Laboratory of Photonics and Communications, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China.

Ning DingSchool of Microelectronics, Southern University of Science and Technology, Shenzhen, Guangdong, China.

Qiancheng ZhaoSchool of Microelectronics, Southern University of Science and Technology, Shenzhen, Guangdong, China. zhaoqc@sustech.edu.cn.ORCID http://orcid.org/0000-0002-0696-8667

Yikai SuState Key Laboratory of Photonics and Communications, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China.ORCID http://orcid.org/0000-0002-1526-8187

Xingchen JiState Key Laboratory of Photonics and Communications, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China. xingchenji@sjtu.edu.cn.ORCID http://orcid.org/0000-0002-0284-0818

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Integrated photonic platforms for supercontinuum generation are revolutionizing applications in metrology, imaging, sensing, and ultrafast photonics. Driven by the advantages of integrated nonlinear waveguides, research has focused on developing novel platforms with broad optical transparency, strong nonlinearity, high refractive index, and low fabrication costs. Here, we explore gallium phosphide (GaP) for supercontinuum generation, leveraging its strong second-order and Kerr nonlinearities, broad optical transparency, and low two-photon absorption at telecom C-band. We report the octave-spanning supercontinuum generation in a sub-millimeter GaP waveguide. The generated supercontinuum, when excited with transversely magnetically polarized light, features a gap-free spectrum and high coherence. Furthermore, our GaP waveguide demonstrates a figure of merit of 43.56 THz/mm/kW, which is the highest reported figure of merit among various integrated photonic platforms operating in the normal dispersion regime. We also observe and analyze the rich underlying physical mechanisms of multiple second harmonics. These results highlight the exceptional versatility of the GaP-on-isolator platform for broadband nonlinear photonics.

Identifiers

PMID41258068

DOI10.1038/s41467-025-65247-4

PMCPMC12630959

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.