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Chin. Phys. B, 2026, Vol. 35(8): 084206    DOI: 10.1088/1674-1056/ae6178
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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
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.
Keywords:  nonlinear optics      second-harmonic generation      two-dimensional materials      signal enhancement  
Received:  27 February 2026      Revised:  10 April 2026      Accepted manuscript online:  20 April 2026
PACS:  42.65.-k (Nonlinear optics)  
  42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)  
  78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)  

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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