Chiral response of a twisted bilayer of hexagonal boron nitride

Wu, Xiaohu; Fu, Ceji; Zhang, Zhuomin M.

doi:10.1016/j.optcom.2019.07.015

Title: Chiral response of a twisted bilayer of hexagonal boron nitride

Abstract

Here, we propose a bilayer structure made of two twisted hexagonal boron nitride (hBN) slabs for realizing tunable chirality in this work. Our numerical results show that a maximum circular dichroism as high as 0.84 can be achieved with the bilayer structure. The chiral response of the proposed structure comes from the combined effects of polarization conversion of circularly polarized wave with the top slab and selective transmission of linearly polarized wave with the bottom slab. Besides, the chirality can be actively controlled by adjusting the optic axis orientation of the top hBN slab. Finally, the bilayer structure is possible to be built with other suitable materials, metamaterials and microstructures for functioning chiral response in different wavebands. Therefore, the results in this work may provide some important hints for the design of novel chiral response sensors for optical, chemical and biological sensing.

Authors:

Wu, Xiaohu ^[1]; Fu, Ceji ^[2]; Zhang, Zhuomin M. ^[3]

Peking Univ., Beijing (China); Georgia Inst. of Technology, Atlanta, GA (United States)
Peking Univ., Beijing (China)
Georgia Inst. of Technology, Atlanta, GA (United States)

Publication Date:: Wed Jul 17 00:00:00 EDT 2019

Research Org.:: Georgia Institute of Technology, Atlanta, GA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)

OSTI Identifier:: 1594779

Alternate Identifier(s):: OSTI ID: 1543167

Grant/Contract Number:: SC0018369; 51576004; 201706010271

Resource Type:: Accepted Manuscript

Journal Name:: Optics Communications

Additional Journal Information:: Journal Volume: 452; Journal Issue: C; Journal ID: ISSN 0030-4018

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; chiral response; twisted bilayer; hexagonal boron nitride; polarization coversion

Citation Formats


                    Wu, Xiaohu, Fu, Ceji, and Zhang, Zhuomin M. Chiral response of a twisted bilayer of hexagonal boron nitride.  United States: N. p., 2019. 
Web.  doi:10.1016/j.optcom.2019.07.015.

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                    Wu, Xiaohu, Fu, Ceji, & Zhang, Zhuomin M. Chiral response of a twisted bilayer of hexagonal boron nitride.  United States.  https://doi.org/10.1016/j.optcom.2019.07.015

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                    Wu, Xiaohu, Fu, Ceji, and Zhang, Zhuomin M. Wed .  
"Chiral response of a twisted bilayer of hexagonal boron nitride".  United States.  https://doi.org/10.1016/j.optcom.2019.07.015.  https://www.osti.gov/servlets/purl/1594779.

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@article{osti_1594779,

  title        = {Chiral response of a twisted bilayer of hexagonal boron nitride},

  author       = {Wu, Xiaohu and Fu, Ceji and Zhang, Zhuomin M.},

  abstractNote = {Here, we propose a bilayer structure made of two twisted hexagonal boron nitride (hBN) slabs for realizing tunable chirality in this work. Our numerical results show that a maximum circular dichroism as high as 0.84 can be achieved with the bilayer structure. The chiral response of the proposed structure comes from the combined effects of polarization conversion of circularly polarized wave with the top slab and selective transmission of linearly polarized wave with the bottom slab. Besides, the chirality can be actively controlled by adjusting the optic axis orientation of the top hBN slab. Finally, the bilayer structure is possible to be built with other suitable materials, metamaterials and microstructures for functioning chiral response in different wavebands. Therefore, the results in this work may provide some important hints for the design of novel chiral response sensors for optical, chemical and biological sensing.},

  doi          = {10.1016/j.optcom.2019.07.015},

  journal      = {Optics Communications},

  number       = C,

  volume       = 452,

  place        = {United States},

  year         = {Wed Jul 17 00:00:00 EDT 2019},

  month        = {Wed Jul 17 00:00:00 EDT 2019}

}

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https://doi.org/10.1016/j.optcom.2019.07.015

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Cited by: 14 works

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Figures / Tables:

Fig. 1: (a) Schematic of the two twisted hBN slabs. The optic axis (OA) of the top slab is in the x-y plane and is tilted off the y-axis by an angle ϕ, while the optic axis of the bottom slab is along the y-axis. (b) The mechanism for realizingmore »

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