Degeneracy breaking of Wood's anomaly for enhanced refractive index sensing

Michal Eitan; Zeev Iluz; Yuval Yifat; Amir Boag; Yael Hanein; Jacob Scheuer

doi:10.1021/acsphotonics.5b00091

Degeneracy breaking of Wood's anomaly for enhanced refractive index sensing

Michal Eitan, Zeev Iluz, Yuval Yifat, Amir Boag, Yael Hanein, Jacob Scheuer^*

^*Corresponding author for this work

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

Abstract

We introduce an ultrasensitive detection technique for refractive index (RI) sensing based on an array of nanometer scale slot-antennas milled in a thin gold layer using a single lithographic step. Our experimental figures of merit (FOMs) of 140-210 in the telecom wavelength range approach the fundamental limit for standard propagating SPR sensors (250).The underlying mechanism enabling this is the combination of a narrowband resonance of the slot-antennas with degeneracy breaking of Wood's anomaly under slightly nonperpendicular illumination. In addition, we explore the sensitivity of the device to the depth of the analyte layer. This concept can be easily tuned to any desired wavelength and RI range by modifying the slot dimensions and the array spacing, thus rendering it highly useful for numerous sensing applications.

Original language	English
Pages (from-to)	615-621
Number of pages	7
Journal	ACS Photonics
Volume	2
Issue number	5
DOIs	https://doi.org/10.1021/acsphotonics.5b00091
State	Published - 20 May 2015

Keywords

Wood's anomaly
figure of merit (FOM)
nanoantennas
refractive index sensing
surface plasmon resonance

Access to Document

10.1021/acsphotonics.5b00091

Cite this

@article{8b2a41a7d52d4163889c182efe6836f6,

title = "Degeneracy breaking of Wood's anomaly for enhanced refractive index sensing",

abstract = "We introduce an ultrasensitive detection technique for refractive index (RI) sensing based on an array of nanometer scale slot-antennas milled in a thin gold layer using a single lithographic step. Our experimental figures of merit (FOMs) of 140-210 in the telecom wavelength range approach the fundamental limit for standard propagating SPR sensors (250).The underlying mechanism enabling this is the combination of a narrowband resonance of the slot-antennas with degeneracy breaking of Wood's anomaly under slightly nonperpendicular illumination. In addition, we explore the sensitivity of the device to the depth of the analyte layer. This concept can be easily tuned to any desired wavelength and RI range by modifying the slot dimensions and the array spacing, thus rendering it highly useful for numerous sensing applications.",

keywords = "Wood's anomaly, figure of merit (FOM), nanoantennas, refractive index sensing, surface plasmon resonance",

author = "Michal Eitan and Zeev Iluz and Yuval Yifat and Amir Boag and Yael Hanein and Jacob Scheuer",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

month = may,

day = "20",

doi = "10.1021/acsphotonics.5b00091",

language = "אנגלית",

volume = "2",

pages = "615--621",

journal = "ACS Photonics",

issn = "2330-4022",

publisher = "American Chemical Society",

number = "5",

}

TY - JOUR

T1 - Degeneracy breaking of Wood's anomaly for enhanced refractive index sensing

AU - Eitan, Michal

AU - Iluz, Zeev

AU - Yifat, Yuval

AU - Boag, Amir

AU - Hanein, Yael

AU - Scheuer, Jacob

PY - 2015/5/20

Y1 - 2015/5/20

N2 - We introduce an ultrasensitive detection technique for refractive index (RI) sensing based on an array of nanometer scale slot-antennas milled in a thin gold layer using a single lithographic step. Our experimental figures of merit (FOMs) of 140-210 in the telecom wavelength range approach the fundamental limit for standard propagating SPR sensors (250).The underlying mechanism enabling this is the combination of a narrowband resonance of the slot-antennas with degeneracy breaking of Wood's anomaly under slightly nonperpendicular illumination. In addition, we explore the sensitivity of the device to the depth of the analyte layer. This concept can be easily tuned to any desired wavelength and RI range by modifying the slot dimensions and the array spacing, thus rendering it highly useful for numerous sensing applications.

AB - We introduce an ultrasensitive detection technique for refractive index (RI) sensing based on an array of nanometer scale slot-antennas milled in a thin gold layer using a single lithographic step. Our experimental figures of merit (FOMs) of 140-210 in the telecom wavelength range approach the fundamental limit for standard propagating SPR sensors (250).The underlying mechanism enabling this is the combination of a narrowband resonance of the slot-antennas with degeneracy breaking of Wood's anomaly under slightly nonperpendicular illumination. In addition, we explore the sensitivity of the device to the depth of the analyte layer. This concept can be easily tuned to any desired wavelength and RI range by modifying the slot dimensions and the array spacing, thus rendering it highly useful for numerous sensing applications.

KW - Wood's anomaly

KW - figure of merit (FOM)

KW - nanoantennas

KW - refractive index sensing

KW - surface plasmon resonance

UR - http://www.scopus.com/inward/record.url?scp=84930205310&partnerID=8YFLogxK

U2 - 10.1021/acsphotonics.5b00091

DO - 10.1021/acsphotonics.5b00091

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:84930205310

SN - 2330-4022

VL - 2

SP - 615

EP - 621

JO - ACS Photonics

JF - ACS Photonics

IS - 5

ER -

Degeneracy breaking of Wood's anomaly for enhanced refractive index sensing

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this