Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/84565
Title: Group-velocity-controlled and gate-tunable directional excitation of polaritons in graphene-boron nitride heterostructures
Authors: Jiang, Yuyu
Lin, Xiao
Low, Tony
Zhang, Baile
Chen, Hongsheng
Keywords: Graphene-hBN Heterostructures
Science::Physics
Directional Excitation
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
http://hdl.handle.net/10220/50422
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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