Enhanced Second‐Harmonic Generation in Quadratically Nonlinear Weyl Semimetal NbAs for Broadband Photodetection Applications Article Swipe
Xin Li
,
Yu Bian
,
Cong Xia
,
Bojin Zhao
,
Shihui Ma
,
Jiajia Wang
,
Hailong Qiu
,
Hongjun Liu
,
Ming Liu
,
Hongwei Yu
,
Ning Ye
,
Zhanggui Hu
,
Yicheng Wu
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1002/adfm.202418485
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1002/adfm.202418485
Quadratically nonlinear photodetectors (QNPDs) typically focus on 2D materials with high second‐order nonlinear polarizability, thereby severely disregarding bulk nonlinear optical (NLO) crystals as these rely on phase‐matching technology and achieving efficient bulk QNPDs remains a significant challenge. Weyl semimetal crystals have some signatures of inversion symmetry breaking, most notably second‐order NLO polarizability, while the inability to balance the low transmittance limits frequency conversion of the zero‐band gap absorption‐induced crystal. Herein, this study investigates an efficient QNPD based on bulk NbAs crystals designed with a strong second‐harmonic effect due to its large refractive index (≈5.0), resulting in an intense laser reflectivity of 50% on its surface, which creates a favorable environment for achieving second‐harmonic generation (SHG) without phase matching. The QNPD has a rectification ratio exceeding 10 7 with a dark current of 164 pA and an enhanced photoresponse in the 355‒1900 nm range, exhibiting a maximum responsivity of 4.1 mA W −1 with a detectivity of 0.8 × 10 10 Jones at 355 nm. The responsivity improvement rate is 88% higher than that of linear NbAs (001) photodetector. This study opens new avenues for designing QNPDs by utilizing the second harmonic effect in bulk Weyl semimetal crystals.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/adfm.202418485
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/adfm.202418485
- OA Status
- bronze
- Cited By
- 5
- References
- 67
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4404507550
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- OpenAlex ID
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https://openalex.org/W4404507550Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1002/adfm.202418485Digital Object Identifier
- Title
-
Enhanced Second‐Harmonic Generation in Quadratically Nonlinear Weyl Semimetal NbAs for Broadband Photodetection ApplicationsWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2024Year of publication
- Publication date
-
2024-11-18Full publication date if available
- Authors
-
Xin Li, Yu Bian, Cong Xia, Bojin Zhao, Shihui Ma, Jiajia Wang, Hailong Qiu, Hongjun Liu, Ming Liu, Hongwei Yu, Ning Ye, Zhanggui Hu, Yicheng WuList of authors in order
- Landing page
-
https://doi.org/10.1002/adfm.202418485Publisher landing page
- PDF URL
-
https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/adfm.202418485Direct link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
bronzeOpen access status per OpenAlex
- OA URL
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/adfm.202418485Direct OA link when available
- Concepts
-
Quadratic growth, Weyl semimetal, Photodetection, Materials science, Broadband, Second-harmonic generation, Semimetal, Nonlinear system, High harmonic generation, Condensed matter physics, Optoelectronics, Optics, Quantum mechanics, Physics, Photodetector, Laser, Mathematical analysis, Mathematics, SiliconTop concepts (fields/topics) attached by OpenAlex
- Cited by
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5Total citation count in OpenAlex
- Citations by year (recent)
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2025: 5Per-year citation counts (last 5 years)
- References (count)
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67Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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