Enhanced Directional Coupling of Light with a Whispering Gallery Microcavity

Fuchuan Lei; Georgiy Tkachenko; Xuefeng Jiang; Jonathan M. Ward; Lan Yang; Síle Nic Chormaic

doi:10.1021/acsphotonics.9b01611

Enhanced Directional Coupling of Light with a Whispering Gallery Microcavity

Fuchuan Lei, Georgiy Tkachenko, Xuefeng Jiang, Jonathan M. Ward, Lan Yang, Síle Nic Chormaic

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

15 Scopus citations

Abstract

Directional coupling of light in nanophotonic circuits has recently attracted increasing interest, with numerous experimental realizations based on broken rotational or mirror symmetries of the light-matter system. The most prominent underlying effect is the spin-orbit interaction of light in subwavelength structures. Unfortunately, coupling of light to such structures is, in general, very inefficient. In this work, we experimentally demonstrate an order of magnitude enhancement of the directional coupling between two nanowaveguides by means of a whispering gallery microcavity. We also show that both transverse magnetic and transverse electric modes can be used for the enhancement.

Original language	English
Pages (from-to)	361-365
Number of pages	5
Journal	ACS Photonics
Volume	7
Issue number	2
DOIs	https://doi.org/10.1021/acsphotonics.9b01611
State	Published - Feb 19 2020

Keywords

Purcell effect
directional coupling
nanofiber
spin-orbit coupling
whispering gallery

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10.1021/acsphotonics.9b01611

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title = "Enhanced Directional Coupling of Light with a Whispering Gallery Microcavity",

abstract = "Directional coupling of light in nanophotonic circuits has recently attracted increasing interest, with numerous experimental realizations based on broken rotational or mirror symmetries of the light-matter system. The most prominent underlying effect is the spin-orbit interaction of light in subwavelength structures. Unfortunately, coupling of light to such structures is, in general, very inefficient. In this work, we experimentally demonstrate an order of magnitude enhancement of the directional coupling between two nanowaveguides by means of a whispering gallery microcavity. We also show that both transverse magnetic and transverse electric modes can be used for the enhancement.",

keywords = "Purcell effect, directional coupling, nanofiber, spin-orbit coupling, whispering gallery",

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AU - Lei, Fuchuan

AU - Tkachenko, Georgiy

AU - Jiang, Xuefeng

AU - Ward, Jonathan M.

AU - Yang, Lan

AU - Chormaic, Síle Nic

PY - 2020/2/19

Y1 - 2020/2/19

N2 - Directional coupling of light in nanophotonic circuits has recently attracted increasing interest, with numerous experimental realizations based on broken rotational or mirror symmetries of the light-matter system. The most prominent underlying effect is the spin-orbit interaction of light in subwavelength structures. Unfortunately, coupling of light to such structures is, in general, very inefficient. In this work, we experimentally demonstrate an order of magnitude enhancement of the directional coupling between two nanowaveguides by means of a whispering gallery microcavity. We also show that both transverse magnetic and transverse electric modes can be used for the enhancement.

AB - Directional coupling of light in nanophotonic circuits has recently attracted increasing interest, with numerous experimental realizations based on broken rotational or mirror symmetries of the light-matter system. The most prominent underlying effect is the spin-orbit interaction of light in subwavelength structures. Unfortunately, coupling of light to such structures is, in general, very inefficient. In this work, we experimentally demonstrate an order of magnitude enhancement of the directional coupling between two nanowaveguides by means of a whispering gallery microcavity. We also show that both transverse magnetic and transverse electric modes can be used for the enhancement.

KW - Purcell effect

KW - directional coupling

KW - nanofiber

KW - spin-orbit coupling

KW - whispering gallery

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JF - ACS Photonics

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Enhanced Directional Coupling of Light with a Whispering Gallery Microcavity

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Keywords

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