中国物理B ›› 2017, Vol. 26 ›› Issue (1): 17301-017301.doi: 10.1088/1674-1056/26/1/017301
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Shu-Lin Wang(王书林), Lan Ding(丁岚), Wen Xu(徐文)
Shu-Lin Wang(王书林)1, Lan Ding(丁岚)1, Wen Xu(徐文)1,2
摘要: We theoretically propose a scheme to realize the dynamic control of the properties of the terahertz (THz) rainbow trapping effect (RTE) based on a silicon-filled graded grating (SFGG) in a relatively broad band via optical pumping. Through the theoretical analysis and finite-element method simulations, it is conceptually demonstrated that the band of the RTE can be dynamically tuned in a range of ~0.06 THz. Furthermore, the SFGG can also be optically switched between a device for the RTE and a waveguide for releasing the trapped waves. The results obtained here may imply applications for the tunable THz plasmonic devices, such as on-chip optical buffers, broad band slow-light systems, and integrated optical filters.
中图分类号: (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))