Nanoscale thickness Octave-spanning coherent supercontinuum light generation
Abstract Coherent broadband light generation has attracted massive attention due to its numerous applications ranging from metrology, sensing, and imaging to communication. In general, spectral broadening is realized via third-order and higher-order nonlinear optical processes (e.g., self-phase modu...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Publishing Group
2025-01-01
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| Series: | Light: Science & Applications |
| Online Access: | https://doi.org/10.1038/s41377-024-01660-6 |
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| author | Susobhan Das Md Gius Uddin Diao Li Yadong Wang Yunyun Dai Juha Toivonen Hao Hong Kaihui Liu Zhipei Sun |
| author_facet | Susobhan Das Md Gius Uddin Diao Li Yadong Wang Yunyun Dai Juha Toivonen Hao Hong Kaihui Liu Zhipei Sun |
| author_sort | Susobhan Das |
| collection | DOAJ |
| description | Abstract Coherent broadband light generation has attracted massive attention due to its numerous applications ranging from metrology, sensing, and imaging to communication. In general, spectral broadening is realized via third-order and higher-order nonlinear optical processes (e.g., self-phase modulation, Raman transition, four-wave mixing, multiwave mixing), which are typically weak and thus require a long interaction length and the phase matching condition to enhance the efficient nonlinear light-matter interaction for broad-spectrum generation. Here, for the first time, we report octave-spanning coherent light generation at the nanometer scale enabled by a phase-matching-free frequency down-conversion process. Up to octave-spanning coherent light generation with a −40dB spectral width covering from ~565 to 1906 nm is demonstrated in discreate manner via difference-frequency generation, a second-order nonlinear process in gallium selenide and niobium oxide diiodide crystals at the 100-nanometer scale. Compared with conventional coherent broadband light sources based on bulk materials, our demonstration is ~5 orders of magnitude thinner and requires ~3 orders of magnitude lower excitation power. Our results open a new way to possibly create compact, versatile and integrated ultra-broadband light sources. |
| format | Article |
| id | doaj-art-e0c2dd4e429a437a9225b7065160682a |
| institution | Kabale University |
| issn | 2047-7538 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Light: Science & Applications |
| spelling | doaj-art-e0c2dd4e429a437a9225b7065160682a2025-01-12T12:40:19ZengNature Publishing GroupLight: Science & Applications2047-75382025-01-011411810.1038/s41377-024-01660-6Nanoscale thickness Octave-spanning coherent supercontinuum light generationSusobhan Das0Md Gius Uddin1Diao Li2Yadong Wang3Yunyun Dai4Juha Toivonen5Hao Hong6Kaihui Liu7Zhipei Sun8Department of Electronics and Nanoengineering, Aalto UniversityDepartment of Electronics and Nanoengineering, Aalto UniversityDepartment of Electronics and Nanoengineering, Aalto UniversityDepartment of Electronics and Nanoengineering, Aalto UniversityDepartment of Electronics and Nanoengineering, Aalto UniversityDepartment of Engineering and Natural Sciences, Tampere UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversityDepartment of Electronics and Nanoengineering, Aalto UniversityAbstract Coherent broadband light generation has attracted massive attention due to its numerous applications ranging from metrology, sensing, and imaging to communication. In general, spectral broadening is realized via third-order and higher-order nonlinear optical processes (e.g., self-phase modulation, Raman transition, four-wave mixing, multiwave mixing), which are typically weak and thus require a long interaction length and the phase matching condition to enhance the efficient nonlinear light-matter interaction for broad-spectrum generation. Here, for the first time, we report octave-spanning coherent light generation at the nanometer scale enabled by a phase-matching-free frequency down-conversion process. Up to octave-spanning coherent light generation with a −40dB spectral width covering from ~565 to 1906 nm is demonstrated in discreate manner via difference-frequency generation, a second-order nonlinear process in gallium selenide and niobium oxide diiodide crystals at the 100-nanometer scale. Compared with conventional coherent broadband light sources based on bulk materials, our demonstration is ~5 orders of magnitude thinner and requires ~3 orders of magnitude lower excitation power. Our results open a new way to possibly create compact, versatile and integrated ultra-broadband light sources.https://doi.org/10.1038/s41377-024-01660-6 |
| spellingShingle | Susobhan Das Md Gius Uddin Diao Li Yadong Wang Yunyun Dai Juha Toivonen Hao Hong Kaihui Liu Zhipei Sun Nanoscale thickness Octave-spanning coherent supercontinuum light generation Light: Science & Applications |
| title | Nanoscale thickness Octave-spanning coherent supercontinuum light generation |
| title_full | Nanoscale thickness Octave-spanning coherent supercontinuum light generation |
| title_fullStr | Nanoscale thickness Octave-spanning coherent supercontinuum light generation |
| title_full_unstemmed | Nanoscale thickness Octave-spanning coherent supercontinuum light generation |
| title_short | Nanoscale thickness Octave-spanning coherent supercontinuum light generation |
| title_sort | nanoscale thickness octave spanning coherent supercontinuum light generation |
| url | https://doi.org/10.1038/s41377-024-01660-6 |
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