| Autor: |
Manlin Luo, Hao Sun, Zhipeng Qi, Kunze Lu, Melvina Chen, Dongho Kang, Youngmin Kim, Daniel Burt, Xuechao Yu, Chongwu Wang, Young Duck Kim, Hong Wang, Qi Jie Wang, Donguk Nam |
| Přispěvatelé: |
School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Optics letters. 47(9) |
| ISSN: |
1539-4794 |
| Popis: |
Strain-engineered graphene has garnered much attention recently owing to the possibilities of creating substantial energy gaps enabled by pseudo-magnetic fields (PMFs). While theoretical works proposed the possibility of creating large-area PMFs by straining monolayer graphene along three crystallographic directions, clear experimental demonstration of such promising devices remains elusive. Herein, we experimentally demonstrate a triaxially strained suspended graphene structure that has the potential to possess large-scale and quasi-uniform PMFs. Our structure employs uniquely designed metal electrodes that function both as stressors and metal contacts for current injection. Raman characterization and tight-binding simulations suggest the possibility of achieving PMFs over a micrometer-scale area. Current-voltage measurements confirm an efficient current injection into graphene, showing the potential of our devices for a new class of optoelectronic applications. We also theoretically propose a photonic crystal-based laser structure that obtains strongly localized optical fields overlapping with the spatial area under uniform PMFs, thus presenting a practical route toward the realization of graphene lasers. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) National Research Foundation (NRF) iGrant of Singapore (A*STAR AME IRG (A2083c0053); National Research Foundation Singapore (Competitive Research Program (NRF-CRP19-2017-01), NRF-ANR Joint Grant (NRF2018-NRF-ANR009 TIGER)); Ministry of Education - Singapore (AcRF TIER (RG 115/21), AcRF TIER 2 (MOE2018-T2-2-011 (S)). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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