Compact SOI nanowire refractive index sensor using phase shifted Bragg grating

Prabhathan, Patinharekandy; Murukeshan, Vadakke Matham; Zhang, Jing; Ramana, P.V.

doi:10.1364/oe.17.015330

Cited by 107 publications

(55 citation statements)

References 19 publications

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“…28 SOI photonic waveguides have also been employed in other evanescent- field sensor configurations, such as microring resonators (described later), and are attractive because of the aforementioned advantages as well as their low cost. 33 …”

Section: Mach–zehnder Interferometermentioning

confidence: 99%

Interferometric Methods for Label-Free Molecular Interaction Studies

2011

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Figure 7. (A) BSI shows the difference in binding affinities for free-solution and surface-immobilized DNA hybridization. 25 (B) BSI detects the kinetic interaction of calmodulin and trifluoperazine. From ref 106. Reprinted with permission from American Association for the Advancement of Science, Copyright 2007. (C) Shows that the magnitude of binding as detected by BSI for α-crystallin to different T4L lysozyme mutants. Reprinted from ref 109.

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Section: Mach–zehnder Interferometermentioning

confidence: 99%

Interferometric Methods for Label-Free Molecular Interaction Studies

2011

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“…Bragg gratings are used in many integrated optical components for a large variety of applications including optical signal processing, high-speed optical communications, sensing systems and networking [1][2][3][4]. Examples of prevalent grating-based components are add/drop filters for wavelength-division-multiplexing (WDM) communication systems, grating-assisted couplers, dispersion compensators, distributed-feedback and distributed-Bragg-reflector lasers [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Various Apodization Functions on the Filtering Characteristics of the Grating-Assisted SOI Strip Waveguides

Karimi¹,

Emami²,

Nozhat³

2014

Journal of the Optical Society of Korea

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In this paper, four apodization functions are proposed for silicon-on-insulator (SOI) strip waveguides with sidewall-corrugated gratings. The effects of apodization functions on the full width at half maximum (FWHM), the side-lobe level, and the reflectivity of the reflection spectrum are studied using the coupled-mode theory (CMT) and the transfer-matrix method (TMM). The results show that applying proposed apodization functions creates very good filtering characteristics. Among investigated apodized waveguides, the apodization functions of Polynomial and z-power have the best performance in reducing side-lobes, where the side-lobe oscillations are entirely removed. Four functions are also used for precise adjustment of the bandwidth. Simulation results show that the minimum and maximum values of the FWHM are 0.74 nm and 8.48 nm respectively. In some investigated functions, changing the apodization parameters decreases the reflectivity which is compensated by increasing the grating length.

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“…1 Wavelength filters are one of the critical components in a PIC design since they can find applications ranging from optical signal processing [2][3][4] to bio-sensing. [5][6][7] A ring resonator with its unique property of compactness and simplicity is highly suitable for on-chip wavelength filtering functionality. 8 However, for a ring resonator the spectral response is periodic in nature and supports large number of resonances with separation between them given by the Free Spectral Range (FSR).…”

Section: Introductionmentioning

confidence: 99%

Narrow band wavelength selective filter using grating assisted single ring resonator

Prabhathan

Murukeshan

2014

Review of Scientific Instruments

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This paper illustrates a filter configuration which uses a single ring resonator of larger radius connected to a grating resonator at its drop port to achieve single wavelength selectivity and switching property with spectral features suitable for on-chip wavelength selection applications. The proposed configuration is expected to find applications in silicon photonics devices such as, on-chip external cavity lasers and multi analytic label-free biosensors. The grating resonator has been designed for a high Q-factor, high transmittivity, and minimum loss so that the wavelength selectivity of the device is improved. The proof-of-concept device has been demonstrated on a Silicon-on-Insulator (SOI) platform through electron beam lithography and Reactive Ion Etching (RIE) process. The transmission spectrum shows narrow band single wavelength selection and switching property with a high Free Spectral Range (FSR) ~60 nm and side band rejection ratio >15 dB.

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Compact SOI nanowire refractive index sensor using phase shifted Bragg grating

Cited by 107 publications

References 19 publications

Interferometric Methods for Label-Free Molecular Interaction Studies

Interferometric Methods for Label-Free Molecular Interaction Studies

The Effects of Various Apodization Functions on the Filtering Characteristics of the Grating-Assisted SOI Strip Waveguides

Narrow band wavelength selective filter using grating assisted single ring resonator

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