Ultra-slow-light and dynamically quantitative optical storage modulation via quasi-BICs.
Opt Lett
; 49(11): 3030-3033, 2024 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-38824320
ABSTRACT
We achieve dynamically tunable dual quasi-bound states in the continuum (quasi-BICs) by implementing them in a silicon-graphene multilayer composite structure and utilize the quasi-BIC modes to achieve ultra-large group delays (velocity of light slows down 105 times), showing 2-3 orders of magnitude higher than the group delays of previous electromagnetically induced transparency modes. The double-layer graphene holds great tuning capability and leads to the dramatically reduced group delay from 1929.82 to 1.58â
ps with only 100â
meV. In addition, the log-linear variation rule of group delay with Fermi level (Ef) in the range of 0-10â
meV is analyzed in detail, and the double-logarithmic function relationship between the group delay and quality factor (Q-factor) is theoretically verified. Finally, the quantitative modulation of the optical storage is further realized in this basis. Our research provides ideas for the reform and upgrading of slow optical devices.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Opt Lett
Ano de publicação:
2024
Tipo de documento:
Article
País de publicação:
Estados Unidos