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  • Received: Sep. 25, 2019

    Accepted: Feb. 21, 2020

    Posted: May. 9, 2020

    Published Online: May. 12, 2020

    The Author Email: Weili Zhang (weili.zhang@okstate.edu)

    DOI: 10.3788/COL202018.062401

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    Leena Singh, Weili Zhang. Advancements in high refractive index media: from quantum coherence in atomic systems to deep sub-wavelength coupling in metamaterials [Invited][J]. Chinese Optics Letters, 2020, 18(6): 062401

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Chinese Optics Letters, Vol. 18, Issue 6, 062401 (2020)

Advancements in high refractive index media: from quantum coherence in atomic systems to deep sub-wavelength coupling in metamaterials [Invited]

Leena Singh and Weili Zhang*

Author Affiliations

  • School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA

Abstract

Refractive index enhancement is crucial in the fields of lithography, imaging, optical communications, solar devices, and many more. We present a review of advancements in the process of designing high refractive index metamaterials, starting from quantum coupling and photonic bandgap materials to metamaterials utilizing deep subwavelength coupling to achieve ever-high values of refractive index. A particular attention is given to experimentally verified schemes in engineering a high index of refraction. The understanding of the evolution of material design from intrinsic electronic states manipulation to meta-atoms design is not only fascinating but also a prerequisite to developing successful devices and applications.

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