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Enhancement of second harmonic generation in two-dimensional materials with dual-stopband distributed Bragg reflector |
| Mengyuan Jia(贾梦源)1, Jukun Zhan(詹居坤)1, Tiejun Huang(黄铁军)1, Jiang Zeng(曾江)2, Yanan Dai(戴亚南)1, and Mingyuan Huang(黄明远)1,† |
1 Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China; 2 Nano Fabrication Facilities (NFF), Core Research Facilities, Southern University of Science and Technology, Shenzhen 518055, China |
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Abstract As a prominent branch of nonlinear optics (NLO), second-harmonic generation (SHG) has been widely studied in fields such as optics, electronics, and materials science. Due to their high conversion efficiency and relaxed phase matching constraints, two-dimensional (2D) materials have become an attractive platform for SHG research. In this work, monolayer MoSe2 was used as the active material, and a dual-stopband distributed Bragg reflector (DBR) structure was fabricated by plasma-enhanced chemical vapor deposition (PECVD) to enhance the SHG efficiency of monolayer MoSe2. The DBR provided substantial enhancement at both the excitation and emission wavelengths. Compared to MoSe2 on a Si substrate, the sample on the DBR exhibited an SHG signal enhancement of over 4000 times. Polarization-dependent measurements showed that the SHG response of MoSe2 on the DBR retained the same polarization dependence as that on the Si substrate. Furthermore, temperature-dependent measurements confirmed that the variation of the SHG signal with temperature followed a consistent trend for MoSe2 on both substrates.
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Received: 27 February 2026
Revised: 10 April 2026
Accepted manuscript online: 20 April 2026
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PACS:
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42.65.-k
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(Nonlinear optics)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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Cite this article:
Mengyuan Jia(贾梦源), Jukun Zhan(詹居坤), Tiejun Huang(黄铁军), Jiang Zeng(曾江), Yanan Dai(戴亚南), and Mingyuan Huang(黄明远) Enhancement of second harmonic generation in two-dimensional materials with dual-stopband distributed Bragg reflector 2026 Chin. Phys. B 35 084206
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