Critical-angle-based sensor with improved figure of merit using dip detection

Ibrahim Watad; Mohamad A. Jabalee; Amir Aizen; Ibrahim Abdulhalim

doi:10.1364/OL.40.004388

Critical-angle-based sensor with improved figure of merit using dip detection

Ibrahim Watad, Mohamad A. Jabalee, Amir Aizen, Ibrahim Abdulhalim

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9 Scopus citations

Abstract

It is demonstrated theoretically and experimentally that a one-dimensional photonic crystal (1D-PC) made of quarter waves stacked on top of a prism exhibits both TE and TM resonances that coincide with the critical angle θ_c when the 1D-PC is semi-infinite and with very little deviation from θ_c for a finite 1D-PC. As a refractive index (RI) sensor, it behaves as a total internal reflection sensor at θ_c with the advantage of detecting a narrow dip rather than an edge and enhanced figure of merit by increasing the number of periods in the 1D-PC. Using the diverging beam approach on an optical bench, a two channel sensor is demonstrated with a sensitivity of 120.9 deg/RIU and a detection limit of 1.9 × 10^-5 RIU.

Original language	English
Pages (from-to)	4388-4391
Number of pages	4
Journal	Optics Letters
Volume	40
Issue number	19
DOIs	https://doi.org/10.1364/OL.40.004388
State	Published - 1 Jan 2015

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Critical-angle-based sensor with improved figure of merit using dip detection",

abstract = "It is demonstrated theoretically and experimentally that a one-dimensional photonic crystal (1D-PC) made of quarter waves stacked on top of a prism exhibits both TE and TM resonances that coincide with the critical angle θc when the 1D-PC is semi-infinite and with very little deviation from θc for a finite 1D-PC. As a refractive index (RI) sensor, it behaves as a total internal reflection sensor at θc with the advantage of detecting a narrow dip rather than an edge and enhanced figure of merit by increasing the number of periods in the 1D-PC. Using the diverging beam approach on an optical bench, a two channel sensor is demonstrated with a sensitivity of 120.9 deg/RIU and a detection limit of 1.9 × 10-5 RIU.",

author = "Ibrahim Watad and Jabalee, {Mohamad A.} and Amir Aizen and Ibrahim Abdulhalim",

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AU - Jabalee, Mohamad A.

AU - Aizen, Amir

AU - Abdulhalim, Ibrahim

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N2 - It is demonstrated theoretically and experimentally that a one-dimensional photonic crystal (1D-PC) made of quarter waves stacked on top of a prism exhibits both TE and TM resonances that coincide with the critical angle θc when the 1D-PC is semi-infinite and with very little deviation from θc for a finite 1D-PC. As a refractive index (RI) sensor, it behaves as a total internal reflection sensor at θc with the advantage of detecting a narrow dip rather than an edge and enhanced figure of merit by increasing the number of periods in the 1D-PC. Using the diverging beam approach on an optical bench, a two channel sensor is demonstrated with a sensitivity of 120.9 deg/RIU and a detection limit of 1.9 × 10-5 RIU.

AB - It is demonstrated theoretically and experimentally that a one-dimensional photonic crystal (1D-PC) made of quarter waves stacked on top of a prism exhibits both TE and TM resonances that coincide with the critical angle θc when the 1D-PC is semi-infinite and with very little deviation from θc for a finite 1D-PC. As a refractive index (RI) sensor, it behaves as a total internal reflection sensor at θc with the advantage of detecting a narrow dip rather than an edge and enhanced figure of merit by increasing the number of periods in the 1D-PC. Using the diverging beam approach on an optical bench, a two channel sensor is demonstrated with a sensitivity of 120.9 deg/RIU and a detection limit of 1.9 × 10-5 RIU.

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Critical-angle-based sensor with improved figure of merit using dip detection

Abstract

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