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Prof. dr. ir. Roel Baets (Professor)
This person is working in this group since 1981.
Roel Baets is a full professor at Ghent University (UGent) and is also associated with IMEC, both in Belgium. He received an MSc degree in EE from UGent, a second MSc degree from Stanford University and a PhD degree from UGent. From 1984 till 1989 he held a postdoc position at IMEC. Since 1989 he has been a professor in the Faculty of Engineering and Architecture of UGent where he founded the Photonics Research Group. From 1990 till 1994 he has also been a part-time professor at TU Delft and from 2004 till 2008 at TU Eindhoven.
Roel Baets has made contributions to research on photonic integrated circuits, both in silicon photonics and in III-V semiconductors, including their heterogeneous integration. In recent years his research gradually moved to the application level, especially with focus on medical and environmental sensing.
Roel Baets has chaired the Photonics Research Group at UGent-IMEC until 2022. With 12 professors and 85 researchers this group is involved in numerous research programs and has led to the creation of 7 spin-off companies.
Roel Baets has led major research projects in silicon photonics in Europe. In 2006 he founded ePIXfab, the globally first Multi-Project-Wafer service for silicon photonics. Since then ePIXfab has evolved to become the European Silicon Photonics Alliance. He was co-founder of the European MSc programme in Photonics of UGent and VUB.
Roel Baets has been an ERC grantee of the European Research Council and a Methusalem grantee of the Flemish government. He is a Fellow of IEEE, of European Optical Society (EOS) and of Optica. He is a member of the Royal Flemish Academy of Belgium for Sciences and the Arts. He has been a recipient of the 2011 MOC award, of the 2018 PIC-International Lifetime Achievement Award, of the 2020 OSA-IEEE John Tyndall award and of the 2023 IEEE Photonics Award.
Since October 2023 Roel Baets is emeritus professor in the Photonics Research Group.
Specific Research Topics
Current Postdoctoral Researchers
Current PhD Students
Graduated PhDs-
Geert Morthier, Analysis of noise and spectral behaviour of DFB laser diodes, (11/1991)
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Piet Verhoeve, Objectgeorienteerde meet- en parameterextractiemethodieken voor opto-elektronische componenten, Object oriented measurement and parameter extraction methologies for opto-electronic components, (11/1998)
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Tim Gyselings, Investigation and Reduction of Crosstalk in Wavelength Division Multiplexed All-Optical Cross Connects, (6/2000)
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Gert Sarlet, Tunable laser diodes for WDM communication - Methods for Caracterisation and control, (12/2000)
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Ronny Bockstaele, Parallelle optische interconnecties op basis van Resonantecaviteits-LED, Resonant Cavity Light Emitting Diode Based Parallel Optical Interconnects, (6/2001)
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Danae Delbeke, Ontwerp en realisatie van een hoogefficiënte lichtemitterende diode: de resonante caviteitsdiode met diffractief rooster, Design and fabrication of a highly efficient light-emitting diode: The Grating-Assisted Resonant-Cavity Light-Emitting Diode, (10/2002)
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Kurt De Mesel, Optische bundelexpansiestructuren voor fotonische geïntegreerde schakelingen, Spot-size converters for photonic integrated circuits, (10/2002)
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Marko Galarza, Leaky-Waveguide-Based Integrated Spot-Size Converters for Alignment-Tolerant Optical Fiber Coupling, (2/2003)
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Mingshan Zhao, All-optical signal regeneration based on gain-clamped semiconductor optical amplifiers, (2/2003)
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Kris Naessens, Excimeerlaser-ablatie van microstructuren in polymeren voor fotonische toepassingen, Excimer laser ablation of microstructures in polymers for photonic applications, (1/2004)
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Wim Bogaerts, Nanofotonische Golfgeleiders en Fotonische Kristallen in Silicium-op-Isolator, Nanophotonic Waveguides and Photonic Crystals in Silicon-on-Insulator, (4/2004)
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Dirk Taillaert, Roosterkoppelaars voor koppeling tussen optische vezels en nanofotonische golfgeleiders, Grating Couplers as Interface between Optical Fibres and Nanophotonic Waveguides, (11/2004)
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Frederik Fransoo, Performantie-analyse van een uitleessysteem voor optische schijven gebaseerd op een multimodale golfgeleider, Performance analysis of a multi-mode waveguide based optical disc readout system, (4/2005)
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Mathias Vanwolleghem, Een geintegreerde InP-gebaseerde optische golfgeleiderisolator op basis van ferromagnetische CoFe-contacten, An integrated InP-based Optical Waveguide Isolator Using Ferromagnetic CoFe Contacts, (5/2005)
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Bjorn Maes, Modellering van niet-lineaire nanofotonische componenten gebaseerd op fotonische kristallen, Modeling of Nonlinear Nanophotonic Components Based on Photonic Crystals, (5/2005)
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Ilse Christiaens, Verticaal gekoppelde microringresonatoren gefabriceerd met waferbonding, Vertically Coupled Microring Resonators Fabricated with Wafer Bonding, (6/2005)
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Bert Luyssaert, Compacte vlakke-golfgeleiderkoppelingen in silicium-op-isolator, Compact Planar Waveguide Spot-Size Converters in Silicon-on-Insulator, (8/2005)
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Gino Priem, Niet-lineair gedrag in nanofotonische golfgeleiders en resonatoren woor ultrasnelle signaalverwerking, Nonlinear Behaviour in Nanophotonic Waveguides and Resonators for Ultrafast Signal Processing, (5/2006)
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Thierry Coosemans, Ontwikkeling van een connectortechnologie voor compacte parallelle verbindingen op basis van plastic optische vezels, Development of a Connector Technology for High-Density Parallel Interconnects Based on Plastic Optical Fibres, (11/2006)
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Pieter Dumon, Ultra-compacte geïntegreerde optische filters in silicium-op-isolator op basis van waferschaaltechnologie, Ultra-Compact Integrated Optical Filters in Silicon-on-insulator by Means of Wafer-Scale Technology, (3/2007)
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Joris Van Campenhout, Dunne-film microlasers voor de integratie van elektronische en fotonische geintegreerde circuits, Thin-Film Microlasers for the Integration of Electronic and Photonic Integrated Circuits, (12/2007)
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Frederik Van Laere, Fotonische geïntegreerde circuits en vezelkoppelaars gebaseerd op InP gebonde membranen, Photonic Integrated Circuits and Fibre Couplers Based on InP Bonded Membranes, (1/2009)
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Stijn Scheerlinck, Koppelen naar en proben van nanofotonische circuits met metaalroosters, Metal Grating Based Interfacing to and Probing of Nanophotonic Circuits, (1/2009)
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Wouter Van Parys, Optimalisering van een geïntegreerde optische isolator gebaseerd op een halfgeleiderversterker met een ferromagnetisch metaalcontact, Optimization of an Integrated Optical Isolator Based on a Semiconductor Amplifier with a Ferromagnetic Metal Contact, (3/2009)
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Peter Debackere, Nanofotonische biosensor gebaseerd op oppervlakte-plasmon interferentie, Nanophotonic Biosensor based on Surface Plasmon Interference, (1/2010)
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Katrien De Vos, Labelvrij fotonisch biosensorplatform met silicium-op-isolator microring resonatoren, Label-Free Silicon Photonics Biosensor Platform with Microring Resonators, (4/2010)
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Koen Huybrechts, Digitale fotonica op basis van laserdiodes voor optische netwerkknopen, Digital Photonics Using Single Laser Diodes for All-Optical Network Nodes, (9/2010)
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Nebiyu Yebo, Gassensoren op basis van geïntegreerde optische circuits in silicium , Silicon Based Integrated Optical Gas Sensing , (12/2012)
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Bart Kuyken, Vierbundelmenging in siliciumgebaseerde nanofotonische circuits met een geoptimaliseerde dispersiekarakteristiek voor telecommunicatie- en sensortoepassingen, Four-Wave-Mixing in Dispersion-Engineered Silicon Nanophotonic Circuits for Telecommunication and Sensing Applications, (6/2013)
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Samir Ghosh, Optische isolatoren in fotonische geïntegreerde schakelingen op basis van silicium, Optical Isolators in Silicon Based Photonic Integrated Circuits, (8/2013)
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Yanlu Li, Miniaturisatie van een laser-dopplervibrometer door middel van een fotonisch circuit op basis van silicium, Miniaturized Laser Doppler Vibrometer Integrated on a Silicon Photonics Platform, (9/2013)
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Eva Ryckeboer, Spectroscopische detectie van glucose met een op silicium gebaseerd optisch circuit, spectroscopic detection of glucose with a silicon photonic integrated circuit, (5/2014)
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Yannick De Koninck, Heterogeen geïntegreerde III-V-microlasers op silicium gebaseerd op resonante roosterspiegels, Heterogeneously Integrated III-V on Silicon Microlasers Based on Resonant Grating Mirrors, (2/2015)
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Gunay Yurtsever, Photonic Integrated Components for Optical Coherence Tomography, (6/2015)
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Frederic Peyskens, Oppervlakteversterkte Ramanspectroscopie met behulp van een monomode-nanofotonisch-plasmonisch platform, Surface Enhanced Raman Spectroscopy Using a Single Mode Nanophotonic-Plasmonic Platform, (5/2016)
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Raphael Van Laer, Interactie tussen licht en geluid in nanoschaal siliciumgolfgeleiders, Light-Sound Interaction in Nanoscale Silicon Waveguides, (5/2016)
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Ashim Dhakal, Nanofotonische golfgeleiderversterkte Ramanspectroscopie, Nanophotonic Waveguide Enhanced Raman Spectroscopy, (9/2016)
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Andreas De Groote, Heterogene integratie van III-V halfgeleiderlichtbronnen met meerdere actieve media op silicium fotonica, Heterogeneous integration of multibandgap III-V semiconductor light sources on silicon photonics, (10/2017)
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Pieter Wuytens, Oppervlakteversterkte Ramanspectroscopie voor intracellulaire metingen en de detectie van protease-activiteit: van chiptechnologie tot toepassingen, Surface-Enhanced Raman Spectroscopy for Intracellular Sensing and Protease Activity Detection: From Chip Technology to Applications, (10/2017)
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Sulakshna Kumari, Integratie van GaAs-VCSELs op SiN-golfgeleidercircuits: ontwerp, technologie en componenten, GaAs VCSEL Integration on SiN Waveguide Circuits: Design, Technology and Devices, (12/2017)
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Haolan Zhao, Coherente ramanspectroscopie met behulp van geintegreerde optische circuits, Coherent Raman Spectroscopy Enabled by Photonic Integrated Circuits, (9/2018)
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Artur Hermans, Dunne filmen van tweede-orde-niet-lineaire optische materialen verwerkt bij lage temperaturen voor geintegreerde fotonische schakelingen in siliciumnitride, Low-Temperature Processed Thin Films of Second-Order Nonlinear Optical Materials for Silicon Nitride Photonic Integrated Circuits, (10/2019)
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Ali Raza, Ramanspectroscopie versterkt door geintegreerde dielektrische en metalen golfgeleiders, Raman spectroscopy enhanced by on-chip dielectric and metal waveguides, (12/2019)
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Xiaomin Nie, Stationaire fouriertransformatiespectrometer op een fotonisch geintegreerd circuit in siliciumnitride, (12/2019)
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Anton Vasiliev, Spectroscopische gassensoren gebaseerd op silicium-fotonica, Silicon Photonics Spectroscopic Trace Gas Sensors , (3/2020)
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Nina Turk, Golfgeleider- en oppervlakteversterkte ramanspectroscopie voor de detectie van protease-activiteit , Waveguide-Based Surface-Enhanced Raman Spectroscopy for Protease Activity Detection , (11/2020)
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Xiaoning Jia, On-Chip Carbon Dioxide Sensor Based on Non-Dispersive Infrared Spectroscopy, (4/2021)
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Kristof Reynkens, Ramanspectroscopie op een chip: uitdagingen door en oplossingen voor achtergrondsignalen, On-Chip Raman Spectroscopy: Background Challenges and Their Mitigation, (10/2021)
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Jeroen Goyvaerts, Near-infrared GaAs-on-SiN Photonic Integration Platform Based on Micro-Transfer-Printing, (12/2021)
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Chupao Lin, UV Photonic Integrated Circuits for Label-Free Structured Illumination Microscopy and Quantitative Phase Imaging, (3/2023)
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Zuyang Liu, Exploring methods to improve the detection limit of waveguide-enhanced Raman spectroscopy, (5/2023)
Patents-
R. Baets, G. Morthier,
Laser structure with distributed feedback and method of fabrication same
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P. Bienstman, R. Baets,
A system for guiding a beam of electromagnetic radiation
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J. Stevens, P. Van Daele, R. Baets,
Monolithic integration of an array of light-emitting elements and driver electronics
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J. Willems, R. Baets,
Integrated tunable optical filter
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R. Baets, G. Morthier,
Optical decision circuit and use thereof
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M. Galarza, K. De Mesel, C. Aramburu, R. Baets,
Semiconductor optical component utilizing leaky structures to match themode of rib waveguides to that of the fiber
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G. Sarlet, J. Buus, R. Baets,
Widely wavelength tunable integrated semiconductor device and method for widely wavelength tuning semiconductor devices
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R. Baets, B. Demeulenaere, B. Dhoedt, S. Goeman,
Optical system with a dielectric subwavelength structure having a high reflectivity and polarisation selectivity
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P.P.P. Debackere, S. Scheerlinck, R. Baets, P. Bienstman,
Integrated surface mode biosensor
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F. Van Laere, D. Taillaert, D. Van Thourhout, R. Baets,
Slanted segmented grating coupler
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S. Scheerlinck, D. Van Thourhout, R. Baets,
Waveguide coupling probe and methods for manufacturing same
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J. Schrauwen, D. Van Thourhout, R. Baets,
Method for wavelength trimming of optical components and optical components thus obtained
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R. Baets, R. Bockstaele, K. Naessens, O. Rits,
Method for providing an optical interface and devices according to such methods
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K. De Mesel, M. Galarza, Aramburo, R. Baets,
Waveguide taper with lateral rib confinement waveguides
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R. Baets, A. Subramanian, N. Le Thomas,
Molecular analysis device
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D. Taillaert, R. Baets,
Fiber to waveguide coupler
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R. Baets, D. Vermeulen, Y. Li, Y. De Koninck,
Integrated Photonics Waveguide Grating Coupler
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G. Roelkens, Joris Roels, R. Baets, Wouter Leten, X. Jia,
Gas sensor device and method of manufacturing the same
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R. Baets, D. Delbeke, E. Hallynck, D. Vermeulen,
Method and system for coupling radiation
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R. Baets, D. Van Thourhout, G. Morthier, Y. De Koninck,
Laser light coupling into SOI CMOS photonic integrated circuit
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Y. Li, R. Baets, E.M.P. Ryckeboer, J. Zhu,
Speckle mitigation
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Mohamed Lamkanfi, P.C. Wuytens, R. Baets, Kris Gevaert,
Label free detection of protease activity
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R. Baets, Z. Wang, X. Liu, Qing Yang, Haifeng Li,
Integrated near-eye display
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G. Roelkens, D. Vermeulen, D. Van Thourhout, R. Baets,
method for reducing the polarization dependent loss
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E.M.P. Ryckeboer, R. Baets,
Sensing of components in liquids
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G. Roelkens, R. Baets, A. De Groote, A. Subramanian, P. Cardile,
On-chip broadband light source
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R. Baets, E.M.P. Ryckeboer, A. Rahim, A. Vasiliev, X. Nie,
Temperature insensitive filter
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D. Delbeke, R. Baets, W. Bogaerts, E.M.P. Ryckeboer,
Implantable sensor
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R. Baets, G. Roelkens, E.M.P. Ryckeboer, X. Nie,
Stationary wave integrated FTS with broadband operation using lateral leakage
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G. Roelkens, W. Bogaerts, R. Baets, D. Delbeke,
Integrated spectrometers with single pixel detectors
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G. Roelkens, D. Van Thourhout, R. Baets, G. van den Hoven,
Method and system for multiplexer waveguide coupling
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E. Dieussaert, R. Baets, Y. Li,
Photonic integrated circuit for multiple frequency shifting of light
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R. Baets, S. Vandewiele, D. Delbeke, D. Van Thourhout,
Adiabatic Coupler
Publications (1512)International Journals
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E. Dieussaert, R. Baets, H. Jans, X. Rottenberg, Y. Li,
Non-contact photoacoustic imaging with a silicon photonics-based Laser Doppler Vibrometer, Scientific Reports, 14, p.22953 doi:10.1038/s41598-024-74266-y (2024) .
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Z. Liu, J. Zhang, G. Roelkens, N. Le Thomas, R. Baets,
Bottom-reflector enhanced grating couplers micro-transfer printed on silicon nitride photonic integrated circuits, accepted for publication in Journal of Lightwave Technology, (to be published) .
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S. Badhwar, L. Marais, H. Khettab, F. Poli, Y. Li, P. Segers, S. Aasmul, M. de Melis, R. Baets, S. Greenwald, R.-M. Bruno, P. Boutouyrie,
Clinical validation of carotid-femoral pulse wave velocity measurement using a multi-beam laser vibrometer: the CARDIS study, Hypertension, 81(9), p.1-10 doi:10.1161/HYPERTENSIONAHA.124.22729 (2024) .
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R. Baets, A. Rahim,
Heterogeneous integration in silicon photonics: opportunities and challenges: opinion, Optica, 13(12), United States, p.3439-3444 doi:10.1364/OME.509531 (2023) .
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E. Dieussaert, R. Baets, Y. Li,
On-chip multi-beam frequency shifter through sideband separation, Optics Express, 31(18), p.29213-29227 doi:10.1364/OE.498792 (2023) .
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C. Lin, David Schaubroeck, R. Baets, Nico Boon, N. Le Thomas,
UV Photonic-Integrated-Circuits-Based Structured Illumination Microscopy With a Field of View Larger than 100 µm2, IEEE Journal on Selected Topics in Quantum Electronics, 29(4), p.1-9 doi:10.1109/JSTQE.2023.3243776 (2023) .
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M. Zenari, M. Buffolo, C. De Santi, J. Goyvaerts, A. Grabowski, J. Gustavsson, S. Kumari, A. Stassren, R. Baets, A. Larsson, G. Roelkens, G. Meneghesso, E. Zanoni, M. Meneghini,
Modeling the electrical degradation of micro-transfer printed 845nm VCSILs for silicon photonics, Transactions on Electron Devices, 71(2), p.1131-1138 doi:10.1109/TED.2023.3346370 (2023) .
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Y. Li, Claudio Bellani, N.A Yebo, Jolien Dendooven, Jin Won Seo, Christophe Detavernier, R. Baets, Johan A. Martens, Sreeprasanth Pulinthanathu Sree,
Nanoporous Silica-Alumina Films Fabricated on Silicon Photonic Chips for Selective Ammonia Sensing, ACS Applied Nano Materials, 5(11), p.16126-16135 doi:10.1021/acsanm.2c02741 (2022) .
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G. Roelkens, J. Zhang, L. Bogaert, M. Billet, D. Wang, B. Pan, C.J. Krückel, E. Soltanian, D. Maes, T. Vanackere, T. Vandekerckhove, S. Cuyvers, J. De Witte, I. Luntadila Lufungula, X. Guo, H. Li, S. Qin, G. Muliuk, S. Uvin, B. Haq, C. Op de Beeck, J. Goyvaerts, G. Lepage, P. Verheyen, J. Van Campenhout, G. Morthier, B. Kuyken, D. Van Thourhout, R. Baets,
Micro-transfer printing for heterogeneous Si photonic integrated circuits, IEEE Journal on Selected Topics in Quantum Electronics (invited), 29(3), p.8200414 doi:10.1109/JSTQE.2022.3222686 (2022) .
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C. Lin, Juan Santo Domingo Penaranda, Jolien Dendooven, Christophe Detavernier, David Schaubroeck, Nico Boon, R. Baets, N. Le Thomas,
UV photonic integrated circuits for far-field structured illumination autofluorescence microscopy, Nature Communications, 13(1), p.1-9 doi:10.1038/s41467-022-31989-8 (2022) .
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Y. Li, E. Dieussaert, R. Baets,
Miniaturization of Laser Doppler vibrometers - a review, Sensors, 22, p.4735 doi:10.3390/s22134735 (2022) .
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G. Morthier, G. Roelkens, R. Baets,
Optical versus RF Free-Space Signal Transmission: a Comparison of Optical and RF Receivers based on Noise Equivalent Power and Signal-to-Noise Ratio, IEEE Journal on Selected Topics in Quantum Electronics, 28(2), p.paper 3700108 (8 pages) doi:10.1109/JSTQE.2021.3129250 (2022) .
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Silvia Seoni, Simeon Beeckman, Y. Li, Soren Aasmul, Umberto Morbiducci, R. Baets, Pierre Boutouyrie, Filippo Molinari, Nilesh Madhu, Patrick Segers,
Template matching and Matrix Profile for Signal Quality Assessment of Carotid and Femoral Laser Doppler Vibrometer Signals, Frontiers in Physiology, 12, p.775052 doi:10.3389/fphys.2021.775052 (2022) .
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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) .
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