Enhanced sensitivity of guided mode resonance sensor through super-mode excitation at near cut-off diffraction

Deb, Hironmay; Srisuai, Nantarat; Jolivot, Romuald; Promptmas, Chamras; Mohammed, Waleed S.; Boonruang, Sakoolkan

doi:10.1016/j.optlastec.2020.106517

Cited by 4 publications

(5 citation statements)

References 19 publications

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“…Under certain conditions, this may cause destructive transmission interference at a specific wavelength, creating sharp resonance features in the reflection spectra known as GMR. 17 GMRs are excellent filter structures for collimated light and can be used for both transmission and/or reflection. The GMR occurs in thin-film systems with diffractive elements and waveguide layers, in which grating diffraction orders can excite waveguide modes.…”

Section: Gmr Structurementioning

confidence: 99%

“…When incident light illuminates the periodic structure, reflected or transmitted waves interfere with leaky guided light of the waveguide. Under certain conditions, this may cause destructive transmission interference at a specific wavelength, creating sharp resonance features in the reflection spectra known as GMR 17 . GMRs are excellent filter structures for collimated light and can be used for both transmission and/or reflection.…”

Section: Gmr Structurementioning

confidence: 99%

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Guided-mode resonance sensors with high sensitivity and asymmetric structures

AlAameri,

Shokooh-Saremi

2024

J. Nanophoton.

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An increasing amount of attention is being paid to guided-mode resonance (GMR) sensors since they can effectively detect small refractive indices (RIs) changes due to their narrow spectral linewidth and high efficiency. In this work, a binary, all-dielectric, asymmetric GMR (A-GMR) sensor structure with enhanced sensitivity and narrowed resonant linewidth is proposed to substantially improve the figure of merit (FOM) with respect to symmetric counterparts. To achieve the best performance, particle swarm optimization is employed to optimize the structural parameters. Furthermore, the proposed GMR sensor is compared with dielectric symmetric GMR sensors. High bulk sensitivity of 3157.6 nm∕RIU, full width at half maximum down to 0.076 nm, and FOM of 41547.368 ðRIUÞ −1 have been achieved for the A-GMR sensor, showing high-performance RI sensing.

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Section: Gmr Structurementioning

confidence: 99%

Section: Gmr Structurementioning

confidence: 99%

Guided-mode resonance sensors with high sensitivity and asymmetric structures

AlAameri,

Shokooh-Saremi

2024

J. Nanophoton.

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“…There are already miniaturized readout systems available, which can convert a wavelength shift into an intensity change 31 , 32 . Integration of the RWG, which operates near the cut-off point with such readout systems can provide commercially available clinical sensors within foreseeable time because their sensitive and flexible measurement method for a wide sensing range 33 , 34 . Despite of the advantages of the RWG sensors, which could be operated near the cut-off point, their operational conditions have never been in-depth analyzed.…”

Section: Introductionmentioning

confidence: 99%

Near cut-off wavelength operation of resonant waveguide grating biosensors

Kovàcs

Kraft

Szabó

et al. 2021

Sci Rep

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Numerical simulations and analytical calculations are performed to support the design of grating-coupled planar optical waveguides for biological sensing. Near cut-off and far from cut-off modes are investigated, and their characteristics and suitability for sensing are compared. The numerical simulations reveal the high sensitivity of the guided mode intensity near the cut-off wavelength for any refractive index change along the waveguide. Consequently, it is sufficient to monitor the intensity change of the near cut-off sensing mode, which leads to a simpler sensor design compared to those setups where the resonant wavelength shift of the guided mode is monitored with high precision. The operating wavelength and the sensitivity of the proposed device can be tuned by varying the geometrical parameters of the corrugated waveguide. These results may lead to the development of highly sensitive integrated sensors, which have a simple design and therefore are cost-effective for a wide range of applications. These numerical findings are supported with experimental results, where the cut-off sensing mode was identified.

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“…A significant amount of shifting can be noted upon increasing the light interaction with the target molecules. Therefore, it is important to enhance the strength of the electric field distributed in the sensing material region. − In addition, the presence of air gaps or pores in the photonic crystal (PC)-based sensors allows for VOC diffusion and more light interactions. Sensor’s efficiency can be further improved via adding nanostructured sensing film ,, or surface’s functional groups …”

Section: Introductionmentioning

confidence: 99%

“…Among the mentioned optical sensors, − GMR is of interest because of the flexibility of the structure design. It can be constructed with different optical materials, including metal oxides, which are normally used in VOC sensing.…”

Section: Introductionmentioning

confidence: 99%

A Nanocolumnar Tantalum Oxide-Guided Mode Resonance Sensor for Volatile Organic Compounds

Srisuai

Chananonnawathorn

Seeleang

et al. 2021

ACS Appl. Nano Mater.

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In this work, a nanocolumnar tantalum oxide waveguide is introduced in a guided-mode resonance-based sensor for volatile organic compound detection. The presence of a nanocolumnar structure where optical resonance is localized allows for molecular diffusion and adsorption and hence the enhancement of the sensor’s sensitivity. Here, the nanocolumnar tantalum oxide film is fabricated using a pulsed direct current reactive magnetron sputtering system at low kinetic energy deposition. By optimizing the operation pressure, both the size and density of the nanocolumnar film can be controlled. The results show that the tantalum oxide film deposited at a higher pressure (30 mTorr) forms a more discrete nanocolumnar structure (refractive index of 1.93 and 20.7% porosity). As a result, the sensor’s sensitivity is remarkably increased up to 15-fold in comparison to the deposition at a lower pressure (10 mTorr, higher refractive index, n = 2.1, and 6.4% porosity). The sensor exhibits good stability and reusability over 25 measurements of isopropanol vapor within a duration of 60 days with 6.4% coefficient of variance at a lower concentration (5%). The selectivity experiment shows good potential of using the proposed sensor for toluene and formaldehyde detection.

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Enhanced sensitivity of guided mode resonance sensor through super-mode excitation at near cut-off diffraction

Cited by 4 publications

References 19 publications

Guided-mode resonance sensors with high sensitivity and asymmetric structures

Guided-mode resonance sensors with high sensitivity and asymmetric structures

Near cut-off wavelength operation of resonant waveguide grating biosensors

A Nanocolumnar Tantalum Oxide-Guided Mode Resonance Sensor for Volatile Organic Compounds

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