Inverse-cavity structure for low-threshold miniature lasers
Abstract Creating micro and nano lasers, high threshold gain is an inherent problem that have critically restricted their great technological potentials. Here, we propose an inverse-cavity laser structure where its threshold gain in the shortest-cavity regime is order-of-magnitude lower than the con...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-15319-y |
| _version_ | 1811323591888732160 |
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| author | Gunpyo Kim Seok Ho Song Jae Woong Yoon |
| author_facet | Gunpyo Kim Seok Ho Song Jae Woong Yoon |
| author_sort | Gunpyo Kim |
| collection | DOAJ |
| description | Abstract Creating micro and nano lasers, high threshold gain is an inherent problem that have critically restricted their great technological potentials. Here, we propose an inverse-cavity laser structure where its threshold gain in the shortest-cavity regime is order-of-magnitude lower than the conventional cavity configurations. In the proposed structure, a resonant feedback mechanism efficiently transfers external optical gain to the cavity mode at a higher rate for a shorter cavity, hence resulting in the threshold gain reducing with decreasing cavity length in stark contrast to the conventional cavity structures. We provide a fundamental theory and rigorous numerical analyses confirming the feasibility of the proposed structure. Remarkably, the threshold gain reduces down by a factor ~ 10−3 for a vertical-cavity surface-emitting laser structure and ~ 0.17 for a lattice-plasmonic nanocavity structure. Therefore, the proposed approach may produce extremely efficient miniature lasers desirable for variety of applications potentially beyond the present limitations. |
| first_indexed | 2024-04-13T13:57:55Z |
| format | Article |
| id | doaj.art-ac20b1391ca84bbcb82bbb98f45817d6 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T13:57:55Z |
| publishDate | 2022-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-ac20b1391ca84bbcb82bbb98f45817d62022-12-22T02:44:08ZengNature PortfolioScientific Reports2045-23222022-07-011211810.1038/s41598-022-15319-yInverse-cavity structure for low-threshold miniature lasersGunpyo Kim0Seok Ho Song1Jae Woong Yoon2Department of Physics, Hanyang UniversityDepartment of Physics, Hanyang UniversityDepartment of Physics, Hanyang UniversityAbstract Creating micro and nano lasers, high threshold gain is an inherent problem that have critically restricted their great technological potentials. Here, we propose an inverse-cavity laser structure where its threshold gain in the shortest-cavity regime is order-of-magnitude lower than the conventional cavity configurations. In the proposed structure, a resonant feedback mechanism efficiently transfers external optical gain to the cavity mode at a higher rate for a shorter cavity, hence resulting in the threshold gain reducing with decreasing cavity length in stark contrast to the conventional cavity structures. We provide a fundamental theory and rigorous numerical analyses confirming the feasibility of the proposed structure. Remarkably, the threshold gain reduces down by a factor ~ 10−3 for a vertical-cavity surface-emitting laser structure and ~ 0.17 for a lattice-plasmonic nanocavity structure. Therefore, the proposed approach may produce extremely efficient miniature lasers desirable for variety of applications potentially beyond the present limitations.https://doi.org/10.1038/s41598-022-15319-y |
| spellingShingle | Gunpyo Kim Seok Ho Song Jae Woong Yoon Inverse-cavity structure for low-threshold miniature lasers Scientific Reports |
| title | Inverse-cavity structure for low-threshold miniature lasers |
| title_full | Inverse-cavity structure for low-threshold miniature lasers |
| title_fullStr | Inverse-cavity structure for low-threshold miniature lasers |
| title_full_unstemmed | Inverse-cavity structure for low-threshold miniature lasers |
| title_short | Inverse-cavity structure for low-threshold miniature lasers |
| title_sort | inverse cavity structure for low threshold miniature lasers |
| url | https://doi.org/10.1038/s41598-022-15319-y |
| work_keys_str_mv | AT gunpyokim inversecavitystructureforlowthresholdminiaturelasers AT seokhosong inversecavitystructureforlowthresholdminiaturelasers AT jaewoongyoon inversecavitystructureforlowthresholdminiaturelasers |