Sensitivity enhancement in photonic crystal slab biosensors

Beheiry, Mohamed El; Liu, Victor; Fan, Shanhui; Levi, Ofer

doi:10.1364/oe.18.022702

Cited by 162 publications

(109 citation statements)

References 50 publications

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“…They can in many ways be considered as regular slab waveguides, but in addition to having a series of guided modes, they also exhibit a group of modes called guided resonances [29,30]. Coupling to guided resonances can be done by normal incidence light, and produces high fields in the membrane [31]. A small particle placed in this field will absorb energy from the guided-resonance mode field.…”

Section: Introductionmentioning

confidence: 99%

Photonic-crystal membranes for optical detection of single nano-particles, designed for biosensor application

Grepstad¹,

Kaspar²,

Solgaard³

et al. 2012

Opt. Express

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Abstract:A sensor designed to detect bio-molecules is presented. The sensor exploits a planar 2D photonic crystal (PC) membrane with sub-micron thickness and through holes, to induce high optical fields that allow detection of nano-particles smaller than the diffraction limit of an optical microscope. We report on our design and fabrication of a PC membrane with a nano-particle trapped inside. We have also designed and built an imaging system where an optical microscope and a CCD camera are used to take images of the PC membrane. Results show how the trapped nano-particle appears as a bright spot in the image. In a first experimental realization of the imaging system, single particles with a radius of 75 nm can be detected.

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Section: Introductionmentioning

confidence: 99%

Photonic-crystal membranes for optical detection of single nano-particles, designed for biosensor application

Grepstad¹,

Kaspar²,

Solgaard³

et al. 2012

Opt. Express

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“…27 Also, in photovoltaics, GR-based back-reflectors have been proposed in order to increase absorption in thin-film solar cells. 28 Moreover, the GR sensitivity (in terms of spectral shift) to changes in the surrounding environment has been exploited in connection with displacement 29 and biological 30,31 sensors. Extension of the GR effects to PQC geometries would bring along the aforementioned aperiodic-order-induced advantages and design perspectives to be exploited in the engineering of the GR phenomenon.…”

mentioning

confidence: 99%

“…[22][23][24][25][26][27][28][29][30][31]. Moreover, in view of the pervasive nature of the involved Fanotype resonant phenomena (ranging from EM and acoustics to atomic and condensed-matter physics; see, e.g., Ref.…”

mentioning

confidence: 99%

Evidence of guided resonances in photonic quasicrystal slabs

Ricciardi¹,

Pisco²,

Cutolo³

et al. 2011

Phys. Rev. B

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We report on the experimental evidence of Fano-type guided resonances (GRs) in aperiodically-ordered photonic quasicrystal slabs. With specific reference to the Ammann-Beenker (8-fold symmetric, quasiperiodic) octagonal tiling geometry, we present our experimental results on silicon-on-insulator devices operating at near-infrared wavelengths, and compare them with the full-wave numerical predictions based on periodic approximants. Our results indicate that spatial periodicity is not strictly required for the GR excitation, and may be effectively surrogated by weaker forms of long-range aperiodic order which intrinsically provide extra degrees of freedom (e.g., higher-order rotational symmetries, richer defect states and phase-matching conditions, etc.) to be exploited in the design and performance optimization of nanostructured dielectric slabs operating in the out-of-plane configuration. The essential spectral features may be qualitatively understood in terms of phase-matching conditions derived from approximate homogenized models, and turn out to be effectively captured by full-wave modeling based on suitably-sized periodic approximants. The discovery, in 1984, of "quasicrystals" in solid-state physics 1,2 has triggered a growing interest in the study of aperiodically-ordered structures (based, e.g., on aperiodic tilings 3 ) in many branches of physics and engineering. 4 In particular, photonic quasicrystals (PQCs) have been widely investigated, [5][6][7] with the main focus on in-plane electromagnetic (EM) propagation effects in two-dimensional structures constituted of aperiodically-ordered arrangements of cylindrical inclusions (or holes) in a host medium. In this framework, certain effects observable in periodic photonic crystals (PCs), such as band gap, field localization, negative refraction and super-focusing, directive emission, etc., have been reproduced numerically and experimentally (see, e.g., Refs. 5-7 and references therein). The related studies provided useful insights in the influence of higher-order rotational symmetries, Bragg-type and multiple scattering, and shortrange interactions.8 Moreover, they also envisaged some potential advantages inherently tied to aperiodic order, such as easier achievement of phase-matching conditions, 9 higher isotropy and tradeoff between (lower) dielectric contrast and (higher) rotational symmetry, 10 richer and more wavelengthselective defect states, 11 field-localization capabilities even in the absence of lattice defects, 12 etc. In this framework, novel design strategies especially tailored to exploit the peculiar aspects and further degrees of freedom inherent of aperiodic order have been developed (see, e.g., Refs. 13 and 14).Much less attention has been devoted to out-of-plane propagation effects, with the notable exceptions of arrays of subwavelength holes in metallic films, [15][16][17][18] and arrays of metallic nanoparticles. 19,20 In particular, these latter results indicated the possibility of exciting broad resonances with enhanced spatial locali...

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“…La resonancia de modo guiado (GMR, guided mode resonance) es un efecto ampliamente utilizado en biodetección, [70][71][72][73] fundamentado en una estructura multicapa de materiales transparentes que combina una guía de onda y una red de difracción (Figura 2). Esta última puede consistir tanto en una red 1D (por ejemplo, tiras de un material dieléctrico espaciadas periódicamente) como 2D (como, por ejemplo, el caso estudiado en esta Tesis: una red cuadrada de nanopilares poliméricos).…”

Section: Biosensores Basados En El Efecto Magmrunclassified

“…37,66,68,[72][73][74]77,83,89,[115][116][117][118] Entre las principales ventajas que la nanoestructuración conlleva está la obtención de una gran relación superficie-volumen, que facilita el acceso de las moléculas de interés a los elementos de reconocimiento, pudiendo repercutir, a su vez, tanto en un aumento de la sensibilidad como en una mayor velocidad de respuesta. La reducción del tamaño del dispositivo sensor implica, además, la posibilidad de utilizar volúmenes muy reducidos de muestras y un bajo consumo energético del dispositivo.…”

Section: Nanoestructuración De Biosensoresunclassified

Desarrollo de superficies nanoestructuradas para biosensores ópticos y sensores biomiméticos

Tejero¹

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Sensitivity enhancement in photonic crystal slab biosensors

Cited by 162 publications

References 50 publications

Photonic-crystal membranes for optical detection of single nano-particles, designed for biosensor application

Photonic-crystal membranes for optical detection of single nano-particles, designed for biosensor application

Evidence of guided resonances in photonic quasicrystal slabs

Desarrollo de superficies nanoestructuradas para biosensores ópticos y sensores biomiméticos

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