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Dr. ir. Umar Khan  (Postdoctoral Researcher)

This person is working in this group since 2016.
Affiliation: Ghent University-IMEC
Department of Information Technology
Address: Technologiepark-Zwijnaarde 126
9052 Gent
Belgium
Office: iGent, Office 140.010
Phone: +32 9 264 3349
E-mail: Umar.Khan@UGent.be
Twitter: @UmarKhan7070
ORCID: 0000-0001-5760-7485
ResearchGateID: Muhammad_Umar_Khan
LinkedIn: omarkhan70
Promotor: Wim Bogaerts
UmarKhan

Specific Research Topics

Current PhD Students

Graduated PhDs

Publications (61)

    International Journals

  1. P. Edinger, G. Jo, C.P.V. Nguyen, A.Y. Takabayashi, C. Errando-Herranz, C. Antony, G. Talli, P. Verheyen, U. Khan, S.J. Bleiker, W. Bogaerts, N. Quack, F. Niklaus, K.B Gylfason, A vacuum-sealed silicon photonic MEMS tunable ring resonator with independent control over coupling and phase, accepted for publication in Optics Express,  (to be published).
  2. Y. Xing, J. Dong, U. Khan, W. Bogaerts, Capturing the effects of spatial process variations in silicon photonic circuits, ACS Photonics, doi:10.1021/acsphotonics.2c01194 (2022)  Download this Publication (14.6MB).
  3. L. Van Iseghem, E. Picavet, A.Y. Takabayashi, P. Edinger, U. Khan, P. Verheyen, N. Quack , K. B. Gylfason, K. De Buysser, J. Beeckman, W. Bogaerts, Low power optical phase shifter using liquid crystal actuation on silicon photonics platform, Optical Materials Express, 12(6), p.2181-2198 doi:10.1364/OME.457589 (2022)  Download this Publication (49.5MB).
  4. M. Wang, X. Chen, U. Khan, W. Bogaerts, Programmable wavelength filter with double ring loaded MZI, Scientific Reports, 12, p.1482 doi:10.1038/s41598-021-04598-6 (2022)  Download this Publication (3.2MB).
  5. G. Jo, P. Edinger, S. Bleiker, X. Wang, A.Y. Takabayashi, H. Sattari, N. Quack, M. Jezzini, P. Verheyen, I. Zand, U. Khan, W. Bogaerts, G. Stemme, K. B. Gylfason, N. Niklaus, Wafer-level Hermetically Sealed Silicon Photonic MEMS, Photonics Research, 10(2), p.14 doi:10.1364/PRJ.441215 (2022)  Download this Publication (1.6MB).
  6. P. Edinger, A.Y. Takabayashi, C. Errando-Herranz, U. Khan, H. Sattari, P. Verheyen, W. Bogaerts, N. Quack, K.B. Gylfason, Silicon photonic microelectromechanical phase shifters for scalable programmable photonics, Optics Letters, 46(22), p.5671-5674 doi:10.1364/OL.436288 (2021)  Download this Publication (4.7MB).
  7. Y. Xing, J. Dong, U. Khan, W. Bogaerts, Correlation between Pattern Density and Linewidth Variation in Silicon Photonics Waveguides, Optics Express, 28(6), p.7961-7968 doi:10.1364/OE.388149 (2020)  Download this Publication (2.2MB).
  8. A. Ribeiro, S. Declercq, U. Khan, M. Wang, L. Van Iseghem, W. Bogaerts, Column-row addressing of thermo-optic phase shifters for controlling large silicon photonic circuits, IEEE Journal on Selected Topics in Quantum Electronics, 26(5), p.6100708 (8 pages) doi:10.1109/JSTQE.2020.2975669 (2020)  Download this Publication (3.3MB).
  9. Y. Xing, M. Wang, A. Ruocco, J. Geessels, U. Khan, W. Bogaerts, A Compact Silicon Photonics Circuit to Extract Multiple Parameters for Process Control Monitoring, OSA Continuum, 3(2), p.379-390 doi:10.1364/OSAC.383711 (2020)  Download this Publication (1.3MB).
  10. W. Bogaerts, Y. Xing, U. Khan, Layout-Aware Variability Analysis, Yield Prediction and Optimization in Silicon Photonic Circuits, IEEE Journal on Selected Topics in Quantum Electronics, 25(5), p.paper 6100413 doi:10.1109/JSTQE.2019.2906271 (2019)  Download this Publication (8.1MB).
  11. U. Khan, Y. Xing, Y. Ye, W. Bogaerts, Photonic integrated circuits design in a foundry+fabless ecosystem, Journal of Selected Topics in Quantum Electronics (invited), 25(5), p.paper 8201014 doi:10.1109/JSTQE.2019.2918949 (2019)  Download this Publication (3.6MB).
  12. Y. Xing, J. Dong, S. Dwivedi, U. Khan, W. Bogaerts, Accurate Extraction of Fabricated Geometry Using Optical Measurement, Photonics Research, 6 (11), p.1008-1020 doi:10.1364/PRJ.6.001008 (2018)  Download this Publication (3.5MB).
      International Conferences

    1. U. Khan, I. Zand, L. Van Iseghem, P. Edinger, G. Jo, S. J. Bleiker, A. Y. Takabayashi, C. Antony, M. Jezzini, G. Talli, H. Sattari, J. Lee, A. K. Mallik, P. Verheyen, C. Lerma Arce, M. Garcia, T. Jonuzi, E. Picavet, K. Nagarjun, J. Watte, N. Quack, F. Niklaus, K. De Buysser, J. Beekman, W. Bogaerts, Low power actuators for programmable photonic processors, (invited) publication in SPIE Photonics West OPTO, United States,  (to be published).
    2. N. Quack, A.Y. Takabayashi, H. Sattari, P. Edinger, G. Jo, Simon J. Bleiker, C. Errando-Herranz, K.B. Gylfason, F. Niklaus, U. Khan, P. Verheyen, A. Kumar Mallik, J.S. Lee, M. Jezzini, G. Talli, C. Antony, P. O'Brien, W. Bogaerts, Silicon Photonic MEMS for Efficient Scaling of Programmable Integrated Optics, Micro and Nano Engineering (invited), Belgium, (2022).
    3. W. Bogaerts, A.Y. Takabayashi, P. Edinger, G. Jo, A.K. Mallik, C. Antony, I. Zand, T. Jonuzi, X. Chen, H. Sattari, J.S. Lee, M.A. Jezzini, G. Talli, C. Lerma Arce, S. Kumar, P. Verheyen, N. Quack, K.B. Gylfason, F. Niklaus, U. Khan, Programmable Photonic Circuits Powered by Silicon Photonic MEMS Technology, Advanced Photonics Congress - NETWORKS, Netherlands, (2022).
    4. L. Van Iseghem, U. Khan, E. Picavet, A.Y. Takabayashi, P. Verheyen, N. Quack, K. De Buysser, J. Beeckman, W. Bogaerts, Low power phase shifter using liquid crystal on an integrated silicon photonics platform, IEEE Photonics Society Summer Topicals (invited), Mexico, p.MB2.1 doi:10.1109/SUM53465.2022.9858217 (2022)  Download this Publication (2.9MB).
    5. W. Bogaerts, X. Chen, H. Deng, L. Van Iseghem, M. Wang, I. Zand, Y. Zhang, Y. Liu, K. Nagarjun, U. Khan, Programmable Silicon Photonic Circuits, OptoElectronics and Communication Conference / International Conference on Photonics in Switching and Computing (OECC / PSC) (invited), Japan, p.TuE4-1  doi:10.23919/OECC/PSC53152.2022.9849952 (2022)  Download this Publication (736KB).
    6. L. Van Iseghem, U. Khan, E. Picavet, A. Y. Takabayashi, P. Verheyen, N. Quack, K. De Buysser, J. Beeckman, W. Bogaerts, Low voltage tuning of ring resonator on a silicon photonics platform with local liquid crystal deposition, International Conference on Optical, Optoelectronic and Photonic Materials and Applications, (2022).
    7. P. Edinger, A.Y. Takabayashi, U. Khan, C. Antony, G. Talli, P. Verheyen, W. Bogaerts, N. Quack, K.B. Gylfason, Low-power micro-electro-mechanical ring resonators on IMEC, ePIXfab Silicon Photonics Summer School, France, (2022)  Download this Publication (10MB).
    8. U. Khan, I. Zand, P. Edinger, G. Jo, S. Bleiker, A. Y. Takabayashi, C. Antony, J. Lee, A. Kumar, P. Verheyen, C. Lerma Arce, T. Jonuzi, J. Watte, N. Quack, F. Niklaus, K. Gylfason, W. Bogaerts, Large scale programmable photonic circuits using silicon photonic MEMS, Conference on Lasers and Electro-Optics (invited), United States, p.AM2C.5 doi:10.1364/CLEO_AT.2022.AM2C.5 (2022)  Download this Publication (2MB).
    9. P. Edinger, C.P.V. Nguyen, A.Y. Takabayashi, C. Antony, G. Talli, P. Verheyen, U. Khan, W. Bogaerts, N. Quack, K.B. Gylfason, Add-drop silicon ring resonator with low-power MEMS tuning of phase and coupling, Conference on Lasers and Electro-Optics, United States, p.SF4M.5 doi:10.1364/CLEO_SI.2022.SF4M.5 (2022)  Download this Publication (1013KB).
    10. W. Bogaerts, L. Van Iseghem, X. Chen, I. Zand, H. Deng, M. Wang, K.P. Nagarjun, U. Khan, Technologies for large-scale programmable photonic circuits, Progress in Electromagnetic Research (PIERS) (invited), China, (2022).
    11. U. Khan, I. Zand, P. Edinger, G. Jo, S. Bleiker, A. Y. Takabayashi, C. Antony, M. Jezzini, G. Talli, H. Sattari, J. Lee, A. Kumar, P. Verheyen, S. Kumar, C. Lerma Arce, M. Garcia, T. Jonuzi, J. Watte, N. Quack, F. Niklaus, K. Gylfason, W. Bogaerts, MORPHIC: MEMS enhanced silicon photonics for programmable circuits, SPIE Photonics Europe 2022, Proc. SPIE (invited), 121480, France, p.121480H doi:10.1117/12.2631231 (2022)  Download this Publication (44.7MB).
    12. W. Bogaerts, A.Y. Takabayashi, P. Edinger, G. Jo, I. Zand, P. Verheyen, M. Jezzini, H. Sattari, G. Talli, C. Antony, M. Saei, C. Lerma-Arce, J. Lee, S. Kumar, M. Garcia, T. Jonuzi, K.B. Gylfason, N. Quack, F. Niklaus, U. Khan, Programmable Silicon Photonic Circuits powered by MEMS, SPIE Photonics West OPTO (invited), 12005, United States, p.12005-21 doi:10.1117/12.2614213 (2022)  Download this Publication (36.7MB).
    13. P. Edinger, A.Y. Takabayashi, C. Errando-Herranz, U. Khan, C. Antony, G. Talli, P. Verheyen, W. Bogaerts, N. Quack, K.B. Gylfason, A Bistable Silicon Photonic Mems Phase Switch for Nonvolatile Photonic Circuits, 2022 IEEE 35th International Conference on Micro Electro Mechanical Systems Conference (MEMS), Japan, p.995-997 doi:10.1109/MEMS51670.2022.9699739 (2022)  Download this Publication (4.4MB).
    14. W. Bogaerts, L. Van Iseghem, X. Chen, I. Zand, H. Deng, M. Wang, Y. Zhang, Y. Liu, K.P. Nagarjun, U. Khan, Programmable Silicon Photonic Circuits, International Symposium on Photonic and Electronic Convergence (ISPEC 2021) (invited), (2021).
    15. M. Wang, X. Chen, U. Khan, W. Bogaerts, Configuration and Optimization of a Programmable Coupled-Ring Loaded Mach-Zehnder Filter, IEEE International Conference on Group IV Photonics, doi:10.1109/GFP51802.2021.9673819 (2021)  Download this Publication (887KB).
    16. K. Rajendran, A. Pandey, P. Edinger, G. Jo, A.Y. Takabayashi, U. Khan, P. Verheyen, N. Quack, F. Niklaus, W. Bogaerts, K. Gylfason, D. Van Thourhout, Thermo-mechanical Noise Measurement of Sealed Nanobeams on a Silicon Photonics-MEMS Platform, IEEE International Conference on Group IV Photonics, doi:10.1109/GFP51802.2021.9673877 (2021)  Download this Publication (1.6MB).
    17. Y. Zhang, H. Deng, U. Khan, W. Bogaerts, Comparison between black box and gray box strategies for configuration of feedforward waveguide meshes, Annual Symposium of the IEEE Photonics Society Benelux Chapter, Belgium, p.Photonics_Integration.1 (2021)  Download this Publication (381KB).
    18. K. Rajendran, A. Pandey, A.Y. Takabayash, U. Khan, W. Bogaerts, N. Quack, D. Van Thourhout, Forward Stimulated Brillouin Scattering in Free-Standing Waveguides on a Silicon Photonics Platform, Frontiers in Optics, doi:10.1364/FIO.2021.FTu6B.3 (2021)  Download this Publication (512KB).
    19. N. Quack, A.Y. Takabayashi, H. Sattari, P. Edinger, K.B. Gylfason, G. Jo, F. Niklaus, P. Verheyen, M. Jezzini, U. Khan, I. Zand, W. Bogaerts, Scalable Nano-Opto-Electromechanical Systems in Silicon Photonics, IEEE Photonics Conference (invited), doi:10.1109/IPC48725.2021.9593009 (2021)  Download this Publication (486KB).
    20. W. Bogaerts, L. Van Iseghem, M. Wang, H. Deng, X. Chen, I. Zand, K.P. Nagarjun, U. Khan, Programmable Photonic Circuits, SPIE Photonex (invited), United Kingdom, doi:10.1117/12.2600687 (2021).
    21. W. Bogaerts, L. Van Iseghem, M. Wang, H. Deng, I. Zand, X. Chen, K.P. Nagarjun, U. Khan, Programmable Silicon Photonics, International Conference on Solid State Devices and Materials (SSDM) (invited), p.E-2_01 (2021)  Download this Publication (1.1MB).
    22. W. Bogaerts, A.Y. Takabayashi, P. Edinger, I. Zand, G. Jo, H. Sattari, P. Verheyen, M.A. Jezzini, C. Antony, G. Talli, M. Saei, S. Kumar, C. Lerma Arce, M. Garcia Porcel, N. Quack, K.B. Gylfason, F. Niklaus, U. Khan, Programmable Photonic Circuits using Silicon Photonic MEMS, Advanced Photonics Congress (invited), p.IM2A.1 doi:10.1364/IPRSN.2021.IM2A.1 (2021)  Download this Publication (1.1MB).
    23. W. Bogaerts, M. Wang, X. Chen, H. Deng, I. Zand, L. Van Iseghem, K.P. Nagarjun, U. Khan, General-Purpose Programmable Photonic Chips, IEEE Photonics Society Summer Topicals (invited), p.WB2.1 doi:10.1109/SUM48717.2021.9505805 (2021)  Download this Publication (1.7MB).
    24. W. Bogaerts, L. Van Iseghem, P. Edinger, H. Sattari, A.Y. Takabayashi, X. Chen, H. Deng, P. Verheyen, A. Ribeiro, U. Khan, N. Quack, K.B. Gylfason, Low-Power Electro-Optic Actuators for Large-Scale Programmable Photonic Circuits, Conference on Lasers and Electro-Optics (invited), p.STh1Q.4 doi:10.1364/CLEO_SI.2021.STh1Q.4 (2021)  Download this Publication (2MB).
    25. W. Bogaerts, X. Chen, I. Zand, M. Wang, H. Deng, L. Van Iseghem, A. Rahim, U. Khan, Tutorial: Programmable Integrated Photonics, European Conference on Optical Communication (ECOC) (invited), p.paper Tu4B-1 (3 pages) doi:10.1109/ECOC48923.2020.9333192 (2020)  Download this Publication (611KB).
    26. W. Bogaerts, X. Chen, M. Wang, I. Zand, H. Deng, L. Van Iseghem, A. Ribeiro, A. Diaz Tormo , U. Khan, Programmable Silicon Photonic Integrated Circuits, IEEE Photonics Conference (IPC) (invited), Canada, p.ThD2.1 doi:10.1109/IPC47351.2020.9252475 (2020)  Download this Publication (2.4MB).
    27. W. Bogaerts, A. Rahim, X. Chen, L. Van Iseghem, H. Deng, M. Wang, I. Zand, A. Ribeiro, A. Diaz Tormo , U. Khan, Programmable Photonic Circuits: a flexible way of manipulating light on chips, Frontiers in Optics (invited), United States, doi:10.1364/FIO.2020.FTh1C.1 (2020)  Download this Publication (1.7MB).
    28. W. Bogaerts, P. Edinger, A.Y. Takabayashi, I. Zand, X. Chen, H. Sattari, P. Verheyen, M. Jezzini, G. Talli, S. Kumar, M. Garcia-Porcel, A. Ribeiro, G. Jo, N. Quack, K. Gylfason, F. Niklaus, U. Khan, Building Large-Scale Programmable Photonic Circuits Using Silicon Photonics MEMS, OSA Advanced Photonics Congress - Photonics in Switching and Computing (invited), Canada, p.PsTh1F.1 doi:10.1364/PSC.2020.PsTh1F.1 (2020)  Download this Publication (663KB).
    29. L. Van Iseghem, U. Khan, P. Edinger, C. Errando-Herranz, A.Y. Takabayashi, H. Sattari, K.B. Gylfason, N. Quack, J. Beeckman, W. Bogaerts, Liquid crystal phase shifter integrated in a silicon photonics platform, European Conference on Integrated Optics, p.1.3 (2020)  Download this Publication (1.8MB).
    30. U. Khan, M. Fiers, Y. Xing, W. Bogaerts, Experimental phase-error extraction and modelling in silicon photonic arrayed waveguide gratings , Photonics West (OPTO), 11285, United States, p.1128510 doi:10.1117/12.2544645 (2020)  Download this Publication (6.9MB).
    31. W. Bogaerts, H. Sattari, P. Edinger, A. Takabayashi, I. Zand, X. Wang, A. Ribeiro, M. Jezzini, C. Errando-Herranz, G. Talli, C. Lerma Arce, S. Kumar, M. Garcia, P. Verheyen, B. Abasahl, F. Niklaus, N. Quack, K. Gylfason, P. O'Brien, U. Khan, MORPHIC: Programmable Photonic Circuits enabled by Silicon Photonic MEMS, SPIE Photonics West - OPTO (invited), 11285, United States, p.1128503 doi:10.1117/12.2540934 (2020)  Download this Publication (11.6MB).
    32. W. Bogaerts, A. Ribeiro, M. Wang, L. Van Iseghem, H. Deng, I. Zand, X. Chen, U. Khan, Technologies for large-scale programmable photonic circuits, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019 (invited), p.11200-55 (2019).
    33. U. Khan, Y. Xing, W. Bogaerts, Parameter extraction, variability analysis and yield prediction of the photonic integrated circuits., Advanced Photonics Congress (invited), United States, p.paper IM3A.2 (2019)  Download this Publication (780KB).
    34. A. Ribeiro, U. Khan, L. Van Iseghem, M. Wang, S. Declercq, W. Bogaerts, Driving and control techniques for large scale programmable photonics circuits, PhotonIcs & Electromagnetics Research Symposium (PIERS) (invited), Italy, p.2568 (2019)  Download this Publication (860KB).
    35. U. Khan, B. Abasahl, I. Zand, N. Quack, K. Gylfason, M. Jezzini, H. Y. Hwang, M. A. G. Porcel, C. Lerma Arce, S. Kumar, W. Bogaerts, Generic Platform for Silicon Photonics based on MEMS Reconfigurable Photonic Integrated Circuits, Photonics & Electromagnetics Research Symposium (PIERS) 2019 (invited), Italy, p.2271 (2019)  Download this Publication (557KB).
    36. W. Bogaerts, Y. Xing, Y. Ye, U. Khan, J. Dong, J. Geessels, M. Fiers, D. Spina, T. Dhaene, Predicting Yield of Photonic Circuits With Wafer-scale Fabrication Variability, 2019 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) (invited), United States, p.1-3 doi:10.1109/NEMO.2019.8853660 (2019)  Download this Publication (1MB).
    37. U. Khan, Y. Xing, A. Ribeiro, W. Bogaerts, Extracting Coupling Coefficients of Directional Couplers, European Conference on Integrated Optics (ECIO 2019), Belgium, p.W.Po.1.8 (2019)  Download this Publication (1MB).
    38. Y. Xing, M. Wang, A. Ruocco, J. Geessels, U. Khan, W. Bogaerts, Extracting Multiple Parameters from a Compact Circuit for Performance Evaluation, European Conference on Integrated Optics (ECIO 2019), Belgium, p.W.Po1.9 (2019)  Download this Publication (1.8MB).
    39. U. Khan, Y. Xing, W. Bogaerts, Designing large-scale photonic integrated circuits, OPTICS 2019 (invited), Italy, p.F.IV.1 (2019).
    40. L. Van Iseghem, U. Khan, J. Beeckman, W. Bogaerts, On-chip beam shaping using lateral leakage, Proceedings of the 23rd Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, p.136-139 (2018)  Download this Publication (711KB).
    41. U. Khan, Y. Xing, W. Bogaerts, Effect of fabrication imperfections on the performance of silicon-on-insulator arrayed waveguide gratings, Proceedings of the 23rd Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, p.7-10 (2018)  Download this Publication (818KB).
    42. I. Zand, B. Abasahl, U. Khan, W. Bogaerts, Controlling parasitics in linear optical processors, Proceedings of the 23rd Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, p.152-155 (2018)  Download this Publication (894KB).
    43. Y. Xing, J. Dong, U. Khan, Y. Ye, D. Spina, T. Dhaene, W. Bogaerts, From Parameter Extraction, Variability Models to Yield_Prediction, Latin America Optics & Photonics Conference (invited), Peru, p.paper W3E.1 (3 pages) doi:10.1364/LAOP.2018.W3E.1 (2018)  Download this Publication (1.5MB).
    44. U. Khan, W. Bogaerts, N. Quack, K.B. Gylfason , P. Verheyen, P. O'Brien, C.L. Arce, M. Garcia, The MORPHIC Project: Enabling large scale programmable photonic circuits using MEMS, Photonics Ireland Conference 2018 (invited), Ireland, p.We.J1.3 (2018)  Download this Publication (859KB).
    45. Y. Xing, J. Dong, U. Khan, W. Bogaerts, Hierarchical Model for Spatial Variations of Integrated Photonics, IEEE International Conference on Group IV Photonics, Mexico, p.91-92 (WD4) doi:10.1109/GROUP4.2018.8478733 (2018)  Download this Publication (4.4MB).
    46. W. Bogaerts, U. Khan, Y. Xing, Layout-Aware Yield Prediction of Photonic Circuits, IEEE International Conference on Group IV Photonics, Mexico, p.p93-93 (WD5) doi:10.1109/GROUP4.2018.8478734 (2018)  Download this Publication (2.7MB).
    47. A. Ribeiro, U. Khan, W. Bogaerts, Matrix Addressing Silicon Photonics Phase Shifters using Heaters with Integrated Diodes, European Conference on Integrated Optics (ECIO, Spain, p.We.3.A.5. (2018)  Download this Publication (250KB).
    48. Y. Xing, U. Khan, Y. Ye, W. Bogaerts, Extracting Fabricated Geometry on Die-Level, 2017 IEEE Photonics Scociety Benelux Annual Symposium, Netherlands, p.148-151 (2017)  Download this Publication (381KB).
    49. Y. Xing, U. Khan, A. Ribeiro, W. Bogaerts, Behavior Model for Directional Coupler, 2017 IEEE Photonics Society Benelux Annual Symposium, Netherlands, p.128-131 (2017)  Download this Publication (677KB).
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