Dr. Kristelle Bougot-Robin Profile

Dr. Kristelle Bougot-Robin

at Imperial College London

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 29 April 2016 Paper

Resonant spatial tracking using nanostructured resonant waveguide grating for multispectral sensing by imaging

Kristelle Bougot-Robin, Wenbin Cao, Shunbo Li, Henri Benisty, Weijia Wen

Proceedings Volume 9899, 98991I (2016) https://doi.org/10.1117/12.2227540

KEYWORDS: Multispectral imaging, Biosensing, Refractive index, Waveguides, Visible radiation, Imaging devices, Optical sensing, Nanostructuring, Multispectral sensing, Biosensing, Glasses, Silicon

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Resonant profile shift resulting from a change of resonant conditions is classically used for sensing, either liquid refractive index or immobilized biological layer effective thickness. Resonant waveguide gratings (RWG) allow sensing over a large spectral domain, depending on the materials and geometrical parameters of the grating. Profiles measurements usually involve scanning instrumentation. We recently demonstrated that direct imaging multi-assay RWGs sensing may be rendered more robust using spatial Fano profiles from “chirped” RWG chips. The scheme circumvents the classical but demanding scans: instead of varying angle or wavelength through fragile moving parts or special optics, a RWG structure parameter is varied. Our findings are illustrated with resonance profiles from nanostructured silicon nitride waveguide on glass. A sensitivity down to Δn=2x10^-5 or biomolecules mass density of 10 pg/mm² is demonstrated through theory and experiments. To assess different sensing wavelength, the period might also vary within the same chip support. We discuss guiding properties and sensing sensitivities of RWG sensing over the whole visible spectral range. Resonant profiles are analyzed using a correlation approach, correlating the sensed signal to a zero-shifted reference signal. This analysis was demonstrated to be more accurate than usual fitting, for analyzing signals including noise contribution. The current success of surface plasmon imaging suggests that our work could leverage an untapped potential to extend such techniques in a convenient and sturdy optical configuration. Moreover, extended spectral range sensing can be addressed by dielectric waveguide structures. This allows sensitive sensing of small volumes of analyte, which can be circulated close from the resonant waveguide. Together with the demonstration of highly accurate fits through correlation analysis, our scheme based on a “Peak-tracking chip” demonstrates a new technique for multispectral sensitive sensing through nanostructured chip imaging.

Proceedings Article | 29 April 2016 Paper

Highly sensitive detection using microring resonator and nanopores

K. Bougot-Robin, J. W. Hoste, N. Le Thomas, P. Bienstman, J. Edel

Proceedings Volume 9899, 98991R (2016) https://doi.org/10.1117/12.2227079

KEYWORDS: Microrings, Molecules, Resonators, Nanoparticles, Particles, Sensing systems, Optical sensing, Nanotechnology, Waveguides, Silicon, Silica, Electrodes, Capillaries

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Proceedings Article | 22 May 2013 Paper

Fano lineshapes of 'Peak-tracking chip' spatial profiles analyzed with correlation analysis for bioarray imaging and refractive index sensing

K. Bougot-Robin, S. Li, W. Yue, L. Q. Chen, X. X. Zhang, W. J. Wen, H. Benisty

Proceedings Volume 8767, 876703 (2013) https://doi.org/10.1117/12.2018316

KEYWORDS: Refractive index, Reflectivity, Waveguides, Biological research, Biosensing, Water, Silicon, Scattering, Statistical analysis, Glasses

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Proceedings Article | 3 May 2013 Paper

Analysis of Fano-line shapes from agile resonant waveguide grating sensors using correlation techniques

K. Bougot-Robin, W. Wen, H. Benisty

Proceedings Volume 8774, 87741B (2013) https://doi.org/10.1117/12.2017563

KEYWORDS: Refractive index, Waveguides, Sensors, Reflectivity, Biosensing, Biological research, Shape analysis, Waveguide sensors, Silicon, Electron beam lithography

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Proceedings Article | 27 April 2010 Paper

UV imaging of biochips based on resonant grating

Kristelle Bougot-Robin, Jean-Luc Reverchon, Henri Benisty, Michel Fromant, Pierre Plateau

Proceedings Volume 7673, 76730R (2010) https://doi.org/10.1117/12.854239

KEYWORDS: Absorption, Ultraviolet radiation, Proteins, Molecules, Molecular biology, Silica, Reflectivity, Sensors, Mirrors, Biological detection systems

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