Experimental observation of wave localization at the Dirac frequency in a two-dimensional photonic crystal microcavity

Lei Hu; Kang Xie; Zhijia Hu; Qiuping Mao; Jiangying Xia; Haiming Jiang; Junxi Zhang; Jianxiang Wen; Jingjing Chen

doi:10.1364/OE.26.008213

Experimental observation of wave localization at the Dirac frequency in a two-dimensional photonic crystal microcavity

Lei Hu, Kang Xie, Zhijia Hu, Qiuping Mao, Jiangying Xia, Haiming Jiang, Junxi Zhang, Jianxiang Wen, Jingjing Chen

Research output: Contribution to journal › Article › peer-review

Abstract

Trapping light within cavities or waveguides in photonic crystals is an effective technology in modern integrated optics. Traditionally, cavities rely on total internal reflection or a photonic bandgap to achieve field confinement. Recent investigations have examined new localized modes that occur at a Dirac frequency that is beyond any complete photonic bandgap. We design Al2O3 dielectric cylinders placed on a triangular lattice in air, and change the central rod size to form a photonic crystal microcavity. It is predicted that waves can be localized at the Dirac frequency in this device without photonic bandgaps or total internal reflections. We perform a theoretical analysis of this new wave localization and verify it experimentally. This work paves the way for exploring localized defect modes at the Dirac point in the visible and infrared bands, with potential applicability to new optical devices.

Original language	English
Pages (from-to)	8213-8223
Journal	Optics Express
Volume	26
Issue number	7
Early online date	21 Mar 2018
DOIs	https://doi.org/10.1364/OE.26.008213
Publication status	Published - 2 Apr 2018

Bibliographical note

© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. An OSA-formatted open access journal article PDF may be governed by the OSA Open Access Publishing Agreement signed by the author and any applicable copyright laws. Authors and readers may use, reuse, and build upon the article, or use it for text or data mining without asking prior permission from the publisher or the Author(s), as long as the purpose is non-commercial and appropriate attribution is maintained.

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10.1364/OE.26.008213Licence: Other

Experimental observation of wave localization at the Dirac frequency
© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. An OSA-formatted open access journal article PDF may be governed by the OSA Open Access Publishing Agreement signed by the author and any applicable copyright laws. Authors and readers may use, reuse, and build upon the article, or use it for text or data mining without asking prior permission from the publisher or the Author(s), as long as the purpose is non-commercial and appropriate attribution is maintained.
Final published version, 3.13 MBLicence: Other

Cite this

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title = "Experimental observation of wave localization at the Dirac frequency in a two-dimensional photonic crystal microcavity",

abstract = "Trapping light within cavities or waveguides in photonic crystals is an effective technology in modern integrated optics. Traditionally, cavities rely on total internal reflection or a photonic bandgap to achieve field confinement. Recent investigations have examined new localized modes that occur at a Dirac frequency that is beyond any complete photonic bandgap. We design Al2O3 dielectric cylinders placed on a triangular lattice in air, and change the central rod size to form a photonic crystal microcavity. It is predicted that waves can be localized at the Dirac frequency in this device without photonic bandgaps or total internal reflections. We perform a theoretical analysis of this new wave localization and verify it experimentally. This work paves the way for exploring localized defect modes at the Dirac point in the visible and infrared bands, with potential applicability to new optical devices.",

author = "Lei Hu and Kang Xie and Zhijia Hu and Qiuping Mao and Jiangying Xia and Haiming Jiang and Junxi Zhang and Jianxiang Wen and Jingjing Chen",

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AU - Hu, Lei

AU - Xie, Kang

AU - Hu, Zhijia

AU - Mao, Qiuping

AU - Xia, Jiangying

AU - Jiang, Haiming

AU - Zhang, Junxi

AU - Wen, Jianxiang

AU - Chen, Jingjing

N1 - © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. An OSA-formatted open access journal article PDF may be governed by the OSA Open Access Publishing Agreement signed by the author and any applicable copyright laws. Authors and readers may use, reuse, and build upon the article, or use it for text or data mining without asking prior permission from the publisher or the Author(s), as long as the purpose is non-commercial and appropriate attribution is maintained.

PY - 2018/4/2

Y1 - 2018/4/2

N2 - Trapping light within cavities or waveguides in photonic crystals is an effective technology in modern integrated optics. Traditionally, cavities rely on total internal reflection or a photonic bandgap to achieve field confinement. Recent investigations have examined new localized modes that occur at a Dirac frequency that is beyond any complete photonic bandgap. We design Al2O3 dielectric cylinders placed on a triangular lattice in air, and change the central rod size to form a photonic crystal microcavity. It is predicted that waves can be localized at the Dirac frequency in this device without photonic bandgaps or total internal reflections. We perform a theoretical analysis of this new wave localization and verify it experimentally. This work paves the way for exploring localized defect modes at the Dirac point in the visible and infrared bands, with potential applicability to new optical devices.

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Experimental observation of wave localization at the Dirac frequency in a two-dimensional photonic crystal microcavity

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