Beaming effect and directional emission from photonic-crystal waveguides

Steven K. Morrison; Yuri S. Kivshar

doi:10.1117/12.588484

Beaming effect and directional emission from photonic-crystal waveguides

Steven K. Morrison^*, Yuri S. Kivshar

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

5 Citations (Scopus)

Abstract

It is known that free-space focusing of light from sub-wavelength apertures, the so-called beaming effect of light, can be achieved through the excitation of radiative surface modes and their subsequent constructive interference in space surrounding the apertures. This effect, studied extensively in metallic thin films, has recently been shown to exist in photonic-crystal structures. In this paper, we present a comprehensive study of the beaming effect and light directional emission achieved through simple geometric and material engineering of the surface and near-surface structures in two types of photonic-crystal waveguides, classified as increased- and decreased-index structures. We analyze different methods to enhance the directional emission and calculate the resulting efficiencies, highlighting the influence of reflections and matching conditions at the waveguide terminations.

Original language	English
Article number	21
Pages (from-to)	104-113
Number of pages	10
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5733
DOIs	https://doi.org/10.1117/12.588484
Publication status	Published - 2005
Event	Photonic Crystal Materials and Devices III - San Jose, CA, United States Duration: 24 Jan 2005 → 27 Jan 2005

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@article{6673bea8c09649f3862b2700319e4c89,

title = "Beaming effect and directional emission from photonic-crystal waveguides",

abstract = "It is known that free-space focusing of light from sub-wavelength apertures, the so-called beaming effect of light, can be achieved through the excitation of radiative surface modes and their subsequent constructive interference in space surrounding the apertures. This effect, studied extensively in metallic thin films, has recently been shown to exist in photonic-crystal structures. In this paper, we present a comprehensive study of the beaming effect and light directional emission achieved through simple geometric and material engineering of the surface and near-surface structures in two types of photonic-crystal waveguides, classified as increased- and decreased-index structures. We analyze different methods to enhance the directional emission and calculate the resulting efficiencies, highlighting the influence of reflections and matching conditions at the waveguide terminations.",

keywords = "Beaming effect, Directed emissions, Photonic crystals, Surface modes, Waveguides",

author = "Morrison, {Steven K.} and Kivshar, {Yuri S.}",

year = "2005",

doi = "10.1117/12.588484",

language = "English",

volume = "5733",

pages = "104--113",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

issn = "0277-786X",

publisher = "SPIE",

note = "Photonic Crystal Materials and Devices III ; Conference date: 24-01-2005 Through 27-01-2005",

}

TY - JOUR

T1 - Beaming effect and directional emission from photonic-crystal waveguides

AU - Morrison, Steven K.

AU - Kivshar, Yuri S.

PY - 2005

Y1 - 2005

N2 - It is known that free-space focusing of light from sub-wavelength apertures, the so-called beaming effect of light, can be achieved through the excitation of radiative surface modes and their subsequent constructive interference in space surrounding the apertures. This effect, studied extensively in metallic thin films, has recently been shown to exist in photonic-crystal structures. In this paper, we present a comprehensive study of the beaming effect and light directional emission achieved through simple geometric and material engineering of the surface and near-surface structures in two types of photonic-crystal waveguides, classified as increased- and decreased-index structures. We analyze different methods to enhance the directional emission and calculate the resulting efficiencies, highlighting the influence of reflections and matching conditions at the waveguide terminations.

AB - It is known that free-space focusing of light from sub-wavelength apertures, the so-called beaming effect of light, can be achieved through the excitation of radiative surface modes and their subsequent constructive interference in space surrounding the apertures. This effect, studied extensively in metallic thin films, has recently been shown to exist in photonic-crystal structures. In this paper, we present a comprehensive study of the beaming effect and light directional emission achieved through simple geometric and material engineering of the surface and near-surface structures in two types of photonic-crystal waveguides, classified as increased- and decreased-index structures. We analyze different methods to enhance the directional emission and calculate the resulting efficiencies, highlighting the influence of reflections and matching conditions at the waveguide terminations.

KW - Beaming effect

KW - Directed emissions

KW - Photonic crystals

KW - Surface modes

KW - Waveguides

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U2 - 10.1117/12.588484

DO - 10.1117/12.588484

M3 - Conference article

AN - SCOPUS:21844480389

SN - 0277-786X

VL - 5733

SP - 104

EP - 113

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

M1 - 21

T2 - Photonic Crystal Materials and Devices III

Y2 - 24 January 2005 through 27 January 2005

ER -

Beaming effect and directional emission from photonic-crystal waveguides

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