Chi(3) VIS/NIR nonlinear optics in silicon-based waveguide circuits
Integrated nonlinear optics ,
Photonic integrated circuits for the visible/near IR ,
Silicon photonics for lab-on-chip spectroscopy
Main Researcher: Haolan Zhao
Silicon photonics leverages the well-developed CMOS fabrication infrastructure for the realization of photonic integrated circuits. This includes devices implemented on silicon-on-insulator and SiN-based circuits. Applications in the visible and near-infrared require the use of SiN waveguide structures, which can be complemented with the integration of high performance silicon-based photodetectors. This enables many applications in the biomedical field in the therapeutic window around 780nm.
Raman Spectroscopy. The figure is reprinted from Wikipedia.
Coherent Anti-Stokes Raman spectroscopy is such an application that allows a sensitive and high throughput analysis of a biological sample of interest. CARS requires either a supercontinuum source or two synchronized short pulse sources of which one is tunable in wavelength. This can be realized using nonlinear optics on a SiN platform and forms the baseline for this work. Given the relatively low nonlinear parameter of SiN the heterogeneous integration of other materials is pursued to enhance the efficiency.
CARS image of a brain slice. The figure is a reprint from .
 Y. Fu, T. Huff, H. Wang, J. Cheng, and H. Wang, "Ex vivo and in vivo imaging of myelin fibers in mouse brain by coherent anti-Stokes Raman scattering microscopy," Opt. Express 16, 19396-19409 (2008).
Other people involved:
PublicationsBack to overview
J. Goyvaerts, A. Grabowski, J. Gustavssson, S. Kumari, A. Stassen, R. Baets, A. Larsson, G. Roelkens,
Enabling VCSEL-on-silicon nitride photonic integrated circuits with micro-transfer-printing, Optica, 8(12), p.1573-1580 doi:https://doi.org/10.1364/OPTICA.441636 (2021) .
Y. Li, H. Zhao, A. Raza, S. Clemmen, R. Baets,
Surface-enhanced Raman spectroscopy based on plasmonic slot waveguides with free-space oblique illumination, Journal of Quantum Electronics, 56(1), p.paper 7200108 (8 pages) doi:10.1109/jqe.2019.2946839 (2020) .
A. Subramanian, E.M.P. Ryckeboer, A. Dhakal, F. Peyskens, A. Malik, B. Kuyken, H. Zhao, S. Pathak, A. Ruocco, A. De Groote, P.C. Wuytens, D. Martens, F. Leo, W. Xie, U.D. Dave, M. Muneeb, Pol Van Dorpe, J. Van Campenhout, W. Bogaerts, P. Bienstman, N. Le Thomas, D. Van Thourhout, Zeger Hens, G. Roelkens, R. Baets,
Silicon and silicon nitride photonic circuits for spectroscopic sensing on-a-chip , Photonics Research (invited), 5(3), p.B47 doi:10.1364/PRJ.3.000B47 (2015) .
H. Zhao, B. Kuyken, S. Clemmen, F. Leo, A. Subramanian, A. Dhakal, P. Helin, S. Simone, E. Brainis, G. Roelkens, R. Baets,
Visible-to-near-infrared octave spanning suprcontinuum generation in a silicon nitride waveguide, Optics Letters, 40(10), United States, p.2177-2180 doi:10.1364/OL.40.002177 (2015) .