Low-Threshold Nanolaser Based on Hybrid Plasmonic Waveguide Mode Supported by Metallic Grating Waveguide Structure
A high <i>Q</i>-factor of the nanocavity can effectively reduce the threshold of nanolasers. In this paper, a modified nanostructure composed of a silver grating on a low-index dielectric layer (LID) and a high-index dielectric layer (HID) was proposed to realize a nanolaser with a lower...
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MDPI AG
2021-09-01
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| Series: | Nanomaterials |
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| author | Xin Zhang Meng Yan Tingyin Ning Lina Zhao Shouzhen Jiang Yanyan Huo |
| author_facet | Xin Zhang Meng Yan Tingyin Ning Lina Zhao Shouzhen Jiang Yanyan Huo |
| author_sort | Xin Zhang |
| collection | DOAJ |
| description | A high <i>Q</i>-factor of the nanocavity can effectively reduce the threshold of nanolasers. In this paper, a modified nanostructure composed of a silver grating on a low-index dielectric layer (LID) and a high-index dielectric layer (HID) was proposed to realize a nanolaser with a lower lasing threshold. The nanostructure supports a hybrid plasmonic waveguide mode with a very-narrow line-width that can be reduced to about 1.79 nm by adjusting the thickness of the LID/HID layer or the duty ratio of grating, and the <i>Q</i>-factor can reach up to about 348. We theoretically demonstrated the lasing behavior of the modified nanostructures using the model of the combination of the classical electrodynamics and the four-level two-electron model of the gain material. The results demonstrated that the nanolaser based on the hybrid plasmonic waveguide mode can really reduce the lasing threshold to 0.042 mJ/cm<sup>2</sup>, which is about three times lower than the nanolaser based on the surface plasmon. The lasing action can be modulated by the thickness of the LID layer, the thickness of the HID layer and the duty cycle of grating. Our findings could provide a useful guideline to design low-threshold and highly-efficient miniaturized lasers. |
| first_indexed | 2024-03-10T06:19:57Z |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T06:19:57Z |
| publishDate | 2021-09-01 |
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| spelling | doaj.art-37f0cac1148e42a3b189a4ff543e323f2023-11-22T19:23:05ZengMDPI AGNanomaterials2079-49912021-09-011110255510.3390/nano11102555Low-Threshold Nanolaser Based on Hybrid Plasmonic Waveguide Mode Supported by Metallic Grating Waveguide StructureXin Zhang0Meng Yan1Tingyin Ning2Lina Zhao3Shouzhen Jiang4Yanyan Huo5Shandong Provincial Key Laboratory of Optics and Photonic Device & Shandong Provincial Engineering and Technical Center of Light Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaShandong Provincial Key Laboratory of Optics and Photonic Device & Shandong Provincial Engineering and Technical Center of Light Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaShandong Provincial Key Laboratory of Optics and Photonic Device & Shandong Provincial Engineering and Technical Center of Light Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaShandong Provincial Key Laboratory of Optics and Photonic Device & Shandong Provincial Engineering and Technical Center of Light Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaShandong Provincial Key Laboratory of Optics and Photonic Device & Shandong Provincial Engineering and Technical Center of Light Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaShandong Provincial Key Laboratory of Optics and Photonic Device & Shandong Provincial Engineering and Technical Center of Light Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaA high <i>Q</i>-factor of the nanocavity can effectively reduce the threshold of nanolasers. In this paper, a modified nanostructure composed of a silver grating on a low-index dielectric layer (LID) and a high-index dielectric layer (HID) was proposed to realize a nanolaser with a lower lasing threshold. The nanostructure supports a hybrid plasmonic waveguide mode with a very-narrow line-width that can be reduced to about 1.79 nm by adjusting the thickness of the LID/HID layer or the duty ratio of grating, and the <i>Q</i>-factor can reach up to about 348. We theoretically demonstrated the lasing behavior of the modified nanostructures using the model of the combination of the classical electrodynamics and the four-level two-electron model of the gain material. The results demonstrated that the nanolaser based on the hybrid plasmonic waveguide mode can really reduce the lasing threshold to 0.042 mJ/cm<sup>2</sup>, which is about three times lower than the nanolaser based on the surface plasmon. The lasing action can be modulated by the thickness of the LID layer, the thickness of the HID layer and the duty cycle of grating. Our findings could provide a useful guideline to design low-threshold and highly-efficient miniaturized lasers.https://www.mdpi.com/2079-4991/11/10/2555nanolaserhybrid plasmonic waveguide modelow-threshold<i>Q</i>-factor |
| spellingShingle | Xin Zhang Meng Yan Tingyin Ning Lina Zhao Shouzhen Jiang Yanyan Huo Low-Threshold Nanolaser Based on Hybrid Plasmonic Waveguide Mode Supported by Metallic Grating Waveguide Structure Nanomaterials nanolaser hybrid plasmonic waveguide mode low-threshold <i>Q</i>-factor |
| title | Low-Threshold Nanolaser Based on Hybrid Plasmonic Waveguide Mode Supported by Metallic Grating Waveguide Structure |
| title_full | Low-Threshold Nanolaser Based on Hybrid Plasmonic Waveguide Mode Supported by Metallic Grating Waveguide Structure |
| title_fullStr | Low-Threshold Nanolaser Based on Hybrid Plasmonic Waveguide Mode Supported by Metallic Grating Waveguide Structure |
| title_full_unstemmed | Low-Threshold Nanolaser Based on Hybrid Plasmonic Waveguide Mode Supported by Metallic Grating Waveguide Structure |
| title_short | Low-Threshold Nanolaser Based on Hybrid Plasmonic Waveguide Mode Supported by Metallic Grating Waveguide Structure |
| title_sort | low threshold nanolaser based on hybrid plasmonic waveguide mode supported by metallic grating waveguide structure |
| topic | nanolaser hybrid plasmonic waveguide mode low-threshold <i>Q</i>-factor |
| url | https://www.mdpi.com/2079-4991/11/10/2555 |
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