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|Title:||Group-velocity-controlled and gate-tunable directional excitation of polaritons in graphene-boron nitride heterostructures||Authors:||Jiang, Yuyu
|Issue Date:||2018||Source:||Jiang, Y., Lin, X., Low, T., Zhang, B., & Chen, H. (2018). Group-Velocity-Controlled and Gate-Tunable Directional Excitation of Polaritons in Graphene-Boron Nitride Heterostructures. Laser & Photonics Reviews, 12(5), 1800049-. doi: 10.1002/lpor.201800049||Series/Report no.:||Laser & Photonics Reviews||Abstract:||A fundamental building block in nano‐photonics is the ability to directionally excite highly squeezed optical mode dynamically, particularly with an electrical bias. Such capabilities would enable the active manipulation of light propagation for information processing and transfer. However, when the optical source is built‐in, it remains challenging to steer the excitation directionality in a flexible way. Here, a mechanism is revealed for tunable directional excitation of highly squeezed polaritons in graphene‐hexagonal boron nitride (hBN) heterostructures. The effect relies on controlling the sign of the group velocity of the coupled plasmon‐phonon polaritons, which can be flipped by simply tuning the chemical potential of graphene (through electrostatic gating) in the heterostructures. Graphene‐hBN heterostructures thus present a promising platform toward nano‐photonic circuits and nano‐devices with electrically reconfigurable functionalities.||URI:||https://hdl.handle.net/10356/84565
|ISSN:||1863-8880||DOI:||10.1002/lpor.201800049||Rights:||This is the peer reviewed version of the following article: Jiang, Y., Lin, X., Low, T., Zhang, B., & Chen, H. (2018). Group-Velocity-Controlled and Gate-Tunable Directional Excitation of Polaritons in Graphene-Boron Nitride Heterostructures. Laser & Photonics Reviews, 12(5), 1800049-, which has been published in final form at https://doi.org/10.1002/lpor.201800049. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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