Grating surface plasmon resonance sensor: Angular sensitivity, metal oxidization effect of Al-based device in optimal structure

Xiaoliang Sun, Xuewen Shu, Changhong Chen*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We present the wavelength (λ)-independent ultimate and maximum angular sensitivity of a grating surface plasmon resonance sensor, as long as the grating of metal has much higher permittivity than analyte (n2 a). For 1.32 ≥ na ≥ 1.36, the maximum angular sensitivity reaches 493.7 (535.9)°/RIU by the single (double)-dip method. The real Al-based sensor in an optimal structure for a high figure of merit exhibits higher sensitivity but narrower reflection dip when working at a longer wavelength, and the real sensitivity increases from 292.5 (344.5) to 338.0 (396.3)°/RIU at respective λ = 0.85 and 1.55 μm before the metal oxidation. After the oxidization, the sensitivity is degraded by ≥3.2% (2.8%), and the detection error of σna ≥ 1.3e -3 (1.1e -3) is introduced to the sensor working at near-infrared wavelengths of interest.

Original languageEnglish
Pages (from-to)1548-1554
Number of pages7
JournalApplied Optics
Volume54
Issue number6
DOIs
Publication statusPublished - 20 Feb 2015

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Surface plasmon resonance
surface plasmon resonance
gratings
sensor
wavelength
Wavelength
dip
sensitivity
metal
sensors
Sensors
Metals
metals
permittivity
Error detection
wavelengths
near infrared
Permittivity
figure of merit
Infrared radiation

Cite this

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title = "Grating surface plasmon resonance sensor: Angular sensitivity, metal oxidization effect of Al-based device in optimal structure",
abstract = "We present the wavelength (λ)-independent ultimate and maximum angular sensitivity of a grating surface plasmon resonance sensor, as long as the grating of metal has much higher permittivity than analyte (n2 a). For 1.32 ≥ na ≥ 1.36, the maximum angular sensitivity reaches 493.7 (535.9)°/RIU by the single (double)-dip method. The real Al-based sensor in an optimal structure for a high figure of merit exhibits higher sensitivity but narrower reflection dip when working at a longer wavelength, and the real sensitivity increases from 292.5 (344.5) to 338.0 (396.3)°/RIU at respective λ = 0.85 and 1.55 μm before the metal oxidation. After the oxidization, the sensitivity is degraded by ≥3.2{\%} (2.8{\%}), and the detection error of σna ≥ 1.3e -3 (1.1e -3) is introduced to the sensor working at near-infrared wavelengths of interest.",
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Grating surface plasmon resonance sensor : Angular sensitivity, metal oxidization effect of Al-based device in optimal structure. / Sun, Xiaoliang; Shu, Xuewen; Chen, Changhong.

In: Applied Optics, Vol. 54, No. 6, 20.02.2015, p. 1548-1554.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Grating surface plasmon resonance sensor

T2 - Angular sensitivity, metal oxidization effect of Al-based device in optimal structure

AU - Sun, Xiaoliang

AU - Shu, Xuewen

AU - Chen, Changhong

PY - 2015/2/20

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N2 - We present the wavelength (λ)-independent ultimate and maximum angular sensitivity of a grating surface plasmon resonance sensor, as long as the grating of metal has much higher permittivity than analyte (n2 a). For 1.32 ≥ na ≥ 1.36, the maximum angular sensitivity reaches 493.7 (535.9)°/RIU by the single (double)-dip method. The real Al-based sensor in an optimal structure for a high figure of merit exhibits higher sensitivity but narrower reflection dip when working at a longer wavelength, and the real sensitivity increases from 292.5 (344.5) to 338.0 (396.3)°/RIU at respective λ = 0.85 and 1.55 μm before the metal oxidation. After the oxidization, the sensitivity is degraded by ≥3.2% (2.8%), and the detection error of σna ≥ 1.3e -3 (1.1e -3) is introduced to the sensor working at near-infrared wavelengths of interest.

AB - We present the wavelength (λ)-independent ultimate and maximum angular sensitivity of a grating surface plasmon resonance sensor, as long as the grating of metal has much higher permittivity than analyte (n2 a). For 1.32 ≥ na ≥ 1.36, the maximum angular sensitivity reaches 493.7 (535.9)°/RIU by the single (double)-dip method. The real Al-based sensor in an optimal structure for a high figure of merit exhibits higher sensitivity but narrower reflection dip when working at a longer wavelength, and the real sensitivity increases from 292.5 (344.5) to 338.0 (396.3)°/RIU at respective λ = 0.85 and 1.55 μm before the metal oxidation. After the oxidization, the sensitivity is degraded by ≥3.2% (2.8%), and the detection error of σna ≥ 1.3e -3 (1.1e -3) is introduced to the sensor working at near-infrared wavelengths of interest.

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