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Prof. dr. Stephane Clemmen  (Professor)

This person is working in this group since 2014.
Affiliation: Department of information Technology
Address: Technologiepark-Zwijnaarde 126
9052 Gent
Office: Gent, Office 150.011
ORCID: 0000-0003-0192-4662
Personal Homepage:
Research Area: quantum optics, Raman spectroscopy, nonlinear optics
Stephane received a degree of master in physics from the Universite Libre de Bruxelles (ULB), Belgium in 2006. From 2006 to 2010, he carried out his PhD work in the LIQ department of the Science Faculty & OPERA-photonique Department of the Applied Science Faculty of ULB thanks to a Doctoral fellowship of the Belgian Fund for Scientific Research (FRIA). Stephane PhD thesis was devoted to nonlinear and quantum optics using silicon photonics. He then worked at Cornell University (NY) in the group of Alexander Gaeta as a post-doc researcher from 2010 to 2014. Stephane joined the Photonics Research Group of the University of Ghent in 2014 as a postdoc researcher and is a part-time professor in this group since 2018. In parallel, Stephane rejoined ULB in 2017 and is a permanent FNRS researcher since 2019 both in the science faculty (LiQ) and in the Brussels School of engineering (OPERA-photonics)

Research interests

Stephane's research interests lie in the generation and manipulation of photonics quantum states on one side and on vibrational scattering spectroscopy on the other side and on anything that can link those two broad topics.

Specific Research Topics

Current Postdoctoral Researchers

Current PhD Students

Graduated PhDs

Publications (46)

    International Journals

  1. S. Massar, S. Clemmen, Resource efficient single photon source based on active frequency multiplexing, Optics Letters, 46(12), p.2832-2835 doi:10.1364/OL.428148 (2021)  Download this Publication (2.2MB).
  2. K.A. Reynkens, S. Clemmen, H. Zhao, A. Raza, T. Vanackere, A. Stassen, M. Van Daele , J. Dendooven, R. Baets, Gold-induced photothermal background in on-chip surface enhanced stimulated Raman spectroscopy, Optics Letters, 29(6), p.8283-8295 doi:10.1364/OL.418527 (2021)  Download this Publication (1.3MB).
  3. K.A. Reynkens, S. Clemmen, A. Raza, H. Zhao, J. S-D. Penaranda, C. Detavernier, R. Baets, Mitigation of photon background in nanoplasmonic all-on-chip Raman sensors, Optics Express, 28(26), p.33564-33572 doi:10.1364/OE.408638 (2020)  Download this Publication (1.1MB).
  4. 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)  Download this Publication (3.1MB).
  5. M. Van Daele, M. Griffiths, A. Raza, S. Matthias, F. Eduardo, J.-Y. Feng, R. Ramachandran, S. Clemmen, R. Baets, S. Barry, C. Detavernier , J. Dendooven, Plasma-enhanced atomic layer deposition of nanostructured gold near room temperature, ACS Appl. Mater. Interfaces, 40(11), p.37229-37238 doi:10.1021/acsami.9b10848 (2019)  Download this Publication (3.8MB).
  6. A. Raza, S. Clemmen, P.C. Wuytens, M. de Goede, A. Tong, N. Le Thomas, C. Liu, J. Suntivich, A. Skirtach, S. Garcia-Blanco, D. Blumenthal, J. Wilkinson, R. Baets, High index contrast photonic platforms for on-chip Raman spectroscopy, Optics Express, 27(16), p.23067-23079 doi:10.1364/OE.27.023067 (2019)  Download this Publication (1.3MB).
  7. S. Ramelow, A. Farsi, Z. Verno, S. Clemmen, X. Ji, J. Sipe, M. Liscidini, M. Lipson, A. Gaeta, Strong Nonlinear Coupling in a Si3N4 Ring Resonator, Physical Review Letters, 122, p.153906 doi:10.1103/physrevlett.122.153906 (2019).
  8. H. D'heer, S. Kumar, C. Lerma Arce, S. Tuccio, S. Clemmen, S. Lenci, A. Stassen, Jan Watte, D. Van Thourhout, Broadband and Temperature Tolerant Silicon Nitride Liquid Controlled Waveguide Coupler, Journal of Lightwave Technologies, 37(10), p.2311-2316 doi:10.1109/JLT.2019.2902113 (2019)  Download this Publication (1.1MB).
  9. A. Hermans, M. Van Daele, J. Dendooven, S. Clemmen, C. Detavernier, R. Baets, Integrated silicon nitride electro-optic modulators with atomic layer deposited overlays, Optics Letters, 44(5), p.1112-1115 doi:10.1364/OL.44.001112 (2019)  Download this Publication (2MB).
  10. J. Losada, A. Raza, S. Clemmen, A. Serrano, A. Griol, R. Baets, A. Martinez, SERS detection via individual bow-tie nanoantenna integrated in SiN waveguides, IEEE Journal on Selected Topics in Quantum Electronics, doi:10.1109/jstqe.2019.2896200 (2019).
  11. A. Raza, S. Clemmen, P.C. Wuytens, M. Muneeb, M. V. Daele, J. Dendooven, C. Detavernier, A. Skirtach, R. Baets, ALD assisted nanoplasmonic slot waveguide for on-chip Enhanced Raman Spectroscopy, Applied Physics Letters - Photonics, 3(11), p.116105 (12 pages) doi:10.1063/1.5048266 (2018)  Download this Publication (1.2MB).
  12. H. Zhao, S. Clemmen, A. Raza, R. Baets, Stimulated Raman spectroscopy of analytes evanescently probed by a silicon nitride photonic integrated waveguide, Optics Letters, 43(6), p.1403-1406 doi:10.1364/OL.43.001403 (2018)  Download this Publication (1.5MB).
  13. A. Hermans, C. Kieninger, K. Koskinen, A. Wickberg, E. Solano, J. Dendooven, M. Kauranen, S. Clemmen, M. Wegener, C. Koos, R. Baets, On the determination of chi(2) in thin films: a comparison of one-beam second-harmonic generation measurement methodologies, Scientific Reports, 7, p.44581 doi:10.1038/srep44581 (2017)  Download this Publication (948KB).
  14. A. Rahim, E.M.P. Ryckeboer, A. Subramanian, S. Clemmen, B. Kuyken, A. Raza, A. Hermans, M. Muneeb, S. Dhoore, Y. Li, U.D. Dave, P. Bienstman, N. Le Thomas, G. Roelkens, D. Van Thourhout, P. Helin, S. Severi, X. Rottenberg, R. Baets, Expanding the Silicon Photonics Portfolio with Silicon Nitride Photonic Integrated Circuits, Journal of Lightwave Technology (invited), 35(4), p.639-649 doi:10.1109/JLT.2016.2617624 (2017)  Download this Publication (598KB).
  15. A. Dhakal, F. Peyskens, S. Clemmen, A. Raza, P.C. Wuytens, H. Zhao, N. Le Thomas, R. Baets, Single mode waveguide platform for spontaneous and surface-enhanced on-chip Raman spectroscopy, Interface Focus (invited), 6(4), United Kingdom, p.article 20160015 doi:10.1098/rsfs.2016.0015 (2016).
  16. B. Kuyken, F. Leo, S. Clemmen, U.D. Dave, R. Van Laer, T. Ideguchi, H. Zhao, X. Liu, J. Safioui, S. Coen, S.P. Gorza, S. Selvaraja, S. Massar, R.M. Osgood Jr, P. Verheyen, J. Van Campenhout, R. Baets, W.M.J. Green, G. Roelkens, Nonlinear optical interactions in silicon waveguides, Nanophotonics (invited), doi:10.1515/nanoph-2016-0001 (2016)  Download this Publication (1.2MB).
  17. S. Clemmen, A. Hermans, E. Solano, J. Dendooven, K. Koskinen, M. Kauranen, E. Brainis, C. Detavernier, R. Baets, Atomic layer deposited second order nonlinear optical metamaterial for back-end integration with CMOS-compatible nanophotonic circuitry, Optics Letters, 40(22), p.5371 doi:10.1364/ol.40.005371 (2015).
  18. A. Dhakal, A. Raza, F. Peyskens, A. Subramanian, S. Clemmen, N. Le Thomas, R. Baets, Efficiency of evanescent excitation and collection of spontaneous Raman scattering near high index contrast channel waveguides, Optics express, 23(21), p.27391-27404 doi:10.1364/OE.23.027391 (2015)  Download this Publication (3MB).
  19. 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)  Download this Publication (510KB).
  20. S. Clemmen, A. Perret, S. Selvaraja, W. Bogaerts, D. Van Thourhout, R. Baets, Ph. Emplit, S. Massar, Generation of correlated photons in hydrogenated amorphous silicon waveguides, Optics letters, 35(20), p.3483-3485  doi:10.1364/OL.35.003483 (2010)  Download this Publication (140KB).
      International Conferences

    1. T. Reep, C. Wu, Z. Wang, S. Brems, S. Clemmen, C. Huyghebaert, J. Van Campenhout, M. Pantouvaki, D. Van Thourhout, B. Kuyken, Saturable absorption of a double layer graphene modulator on a slot waveguide, IEEE Photonics Conference (IPC), (2022)  Download this Publication (1.1MB).
    2. S. Cuyvers, T. Vanackere, T. Vandekerckhove, S. Poelman, C. Op de Beeck, J. De Witte, A. Hermans, K. Van Gasse, N. Picque, D. Van Thourhout, G. Roelkens, S. Clemmen, B. Kuyken, High-Yield Heterogeneous Integration of Silicon and Lithium Niobate Thin Films, accepted for publication in Conference on Lasers and Electro-Optics, United States,  (to be published).
    3. T. Vanackere, M. Billet, C. Op de Beeck, S. Poelman, G. Roelkens, S. Clemmen, B. Kuyken, Micro-Transfer Printing of Lithium Niobate on Silicon Nitride, European Conference on Optical Communication, Belgium, (2020).
    4. S. Clemmen, Coherent frequency conversion for quantum information processing, Conference on Real-Time Measurements, Rogue Phenomena, and Single-Shot Applications V (invited), 11265, United States, p. Article Number: 112650G (7 pages) doi:10.1117/12.2550159 (2020)  Download this Publication (639KB).
    5. Michiel Van Daele, Matthew BE Griffiths, A. Raza, Matthias M Minjauw, Eduardo Solano, Ji-Yu Feng, Ranjith K Ramachandran, S. Clemmen, R. Baets, Se├ín T Barry, Christophe Detavernier, Jolien Dendooven, Near Room Temperature PE-ALD of Nanostructured Gold for Enhanced Raman Scattering, ECS Meeting Abstracts, MA2019-02, doi:10.1149/ma2019-02/24/1156 (2019).
    6. H. Zhao, A. Raza, B. Baumgartner, S. Clemmen, B. Lendl, A. Skirtach, R. Baets, Waveguide-Enhanced Raman Spectroscopy Using a Mesoporous Silica Sorbent Layer for Volatile Organic Compound (VOC) Sensing, Conference on Lasers and Electro-Optics (CLEO), United States, p.paper STh1F.7 (2 pages) doi:10.1364/CLEO_SI.2019.STh1F.7 (2019)  Download this Publication (1.6MB).
    7. A. Raza, S. Clemmen, M. Van Daele, J. Dendooven, M.B. E. Griffiths, S.T. Barry, A. Skirtach, C. Detavernier, R. Baets, On-chip surface enhanced Raman spectroscopy using ALD grown plasmonic nanotrenches integrated with a silicon nitride slot waveguide, European Conference on Integrated Optics (ECIO 2019), 21, Belgium, p.paper T.B1.3 (2019)  Download this Publication (1.4MB).
    8. A. Hermans, S. Clemmen, R. Baets, J. Genoe, C. Rolin, Growth of Organic Crystalline Thin Films with Strong Second-Order Nonlinearity for Integrated Optics, European Conference on Integrated Optics (ECIO 2019), Belgium, p.W.A3.3 (2019)  Download this Publication (300KB).
    9. A. Raza, S. Clemmen, M. V. Daele, P.C. Wuytens, J. Dendooven, C. Detavernier, R. Baets, The comparison of on-chip SERS substrates: Nanoplasmonic bowtie antenna vs metal slot waveguide, Proceedings of the 23rd Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, (2018)  Download this Publication (408KB).
    10. A. Hermans, R. Janneck, C. Rolin, S. Clemmen, P. Heremans, J. Genoe, R. Baets, Growth of thin film organic crystals with strong nonlinearity for on-chip second-order nonlinear optics, Proceedings of the 23rd Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, (2018)  Download this Publication (316KB).
    11. A. Raza, S. Clemmen, M. de Goede, R. Ali, P. Hua, S. M. Garcia-Blanco, S. Honkanen, J. S. Wilkinson, R. Baets, The performance of High-Index-Contrast Photonics Platforms for On-Chip Raman Spectroscopy, European Conference on Integrated Optics (ECIO, Spain, p.35-37 (2018)  Download this Publication (195KB).
    12. A. Raza, J. Losada, S. Clemmen, R. Baets, A. Griol, A. Martinez, Surface enhanced Raman spectroscopy via isolated plasmonic nanoantennas integrated on silicon nitride waveguides, European Conference on Integrated Optics (ECIO, Spain, p.104-106 (2018).
    13. H. Zhao, S. Clemmen, A. Raza, R. Baets, Demonstration of Stimulated Raman Scattering on a Silicon Nitride Photonic Integrated Waveguide, Conference on Lasers and Electro-Optics (CLEO 2018), United States, doi:10.1364/CLEO_SI.2018.SM1B.3 (2018)  Download this Publication (2.1MB).
    14. A. Raza, M. Van Daele, P.C. Wuytens, J. Dendooven, C. Detavernier, S. Clemmen, R. Baets, E-beam-lithography free plasmonic slot waveguides for on-chip Raman spectroscopy, CLEO 2018, United States, p.paper SW3L.6 doi:10.1364/CLEO_SI.2018.SW3L.6 (2018).
    15. A. Hermans, M. Van Daele, C. Kieninger, J. Dendooven, S. Clemmen, C. Detavernier, C. Koos, R. Baets, CMOS-Compatible ALD Zinc Oxide Coating for On-Chip Second-Order Nonlinear Optical Functionalities, Conference on Lasers and Electro-Optics 2017, United States, p.SM3K.3  doi:10.1364/CLEO_SI.2017.SM3K.3 (2017)  Download this Publication (373KB).
    16. K. Alexander, M. Mohsin, U.D. Dave, L. Abdollahi Shiramin, S. Clemmen, D. Neumaier, B. Kuyken, D. Van Thourhout, Electrically Tunable Optical Nonlinearity of Graphene-covered SiN waveguides, Conference on Lasers and Electro-Optics (CLEO) 2017, United States, p.paper FM2F.3 doi:10.1364/cleo_qels.2017.fm2f.3 (2017)  Download this Publication (605KB).
    17. A. Raza, F. Peyskens, P.C. Wuytens, S. Clemmen, P. V. Dorpe, R. Baets, Detection of Surface-enhanced Raman Signals from a Single Nanoplasmonic Antenna Integrated on a Single Mode Waveguide , CLEO: Science and Innovations,, United States, p.paper SM.4D.6 doi:10.1364/cleo_si.2017.sm4d.6 (2017)  Download this Publication (559KB).
    18. A. Hermans, M. Van Daele, J. Dendooven, S. Clemmen, C. Detavernier, R. Baets, Electro-Optic Modulation in Silicon Nitride Photonic Integrated Circuits by means of ALD ZnO Overlays, European Conference on Integrated Optics (ECIO), Netherlands, p.T5.3 (2017)  Download this Publication (579KB).
    19. A. Raza, P.C. Wuytens, F. Peyskens, S. Clemmen, P. V. Dorpe, R. Baets, On-chip Enhanced Raman spectroscopy using metal slot waveguide, European Conference on Integrated Optics (ECIO), 19(T7.4), Netherlands, (2017).
    20. S. Clemmen, A. Raza, A. Dhakal, F. Peyskens, A. Subramanian, P, Van Dorpe, P.C. Wuytens, H. Zhao, E.M.P. Ryckeboer, S. Severi, N. Le Thomas, R. Baets, Spectroscopic sensing with silicon nitride photonic integrated circuits, Photonics West 2017, Proc. SPIE 10106, Integrated Optics: Devices, Materials, and Technologies XXI (invited), United States, p.101060T doi:10.1117/12.2256526 (2017)  Download this Publication (1.6MB).
    21. A. Raza, F. Peyskens, S. Clemmen, R. Baets, Towards Single Antenna On-Chip Surface Enhanced Raman Spectroscopy: Arch Dipole Antenna, The 7th International Conference on Metamaterials, Photonic Cyrstals and Plasmonics (META'16), 7, Spain, p.1196-1197 (2016)  Download this Publication (480KB).
    22. E.M.P. Ryckeboer, X. Nie, A. Subramanian, D. Martens, P. Bienstman, S. Clemmen, S. Severi, R. Jansen, G. Roelkens, R. Baets, CMOS-compatible silicon nitride spectrometers for lab-on-a-chip spectral sensing, Photonics Europe 2016, Proc. SPIE 9891, Silicon Photonics and Photonic Integrated Circuits V, 98911K (invited), Belgium, doi:10.1117/12.2234978 (2016)  Download this Publication (1.3MB).
    23. R. Baets, A. Subramanian, S. Clemmen, B. Kuyken, P. Bienstman, N. Le Thomas, G. Roelkens, D. Van Thourhout, Ph. Helin, S. Severi, Silicon Photonics: silicon nitride versus silicon-on-insulator, Optical Fiber Communication Conference 2016 (invited), United States, p.Th3J.1 doi:10.1364/ofc.2016.th3j.1 (2016)  Download this Publication (245KB).
    24. A. Hermans, S. Clemmen, E. Solano, J. Dendooven, E. Brainis, C. Detavernier, R. Baets, Second-harmonic generation based on symmetry breaking in a periodically layered medium, Proceedings of the 18th Annual Workshop of the IEEE/Photonics Benelux Chapter, Belgium, p.6-7 (2015).
    25. H. Zhao, B. Kuyken, F. Leo, S. Clemmen, E. Brainis, G. Roelkens, R. Baets, visible-to-near-infrared octave spanning supercontiuum generation in a partially under etched silicon nitride waveguide, CLEO, United States, doi:10.1364/cleo_si.2015.sf2d.6 (2015)  Download this Publication (354KB).
        National Conferences

      1. P.C. Wuytens, A. Raza, H. Zhao, N. Turk, F. Peyskens, X. Nie, A. Dhakal, E.M.P. Ryckeboer, S. Clemmen, N. Le Thomas, R. Baets, On-chip Raman Spectroscopy, FEA Research Syposium 2017, Belgium, (2017)  Download this Publication (5MB).
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