Book Chapters

  1. D. Hohlfeld, T. Bechtold, E. Rudnyi, B. Op het Veld, R. van Schaijk, "Towards system-level simulation of energy harvesting modules" in "System-Level Modeling of MEMS”, Wiley-VCH, (2013).
  2. T. Bechtold, D. Hohlfeld, E. B. Rudnyi, J.G. Korvink, "Moment-matching-based linear model order reduction for non-parametric and parametric electro-thermal MEMS models” in "System-Level Modeling of MEMS Wiley-VCH, (2013).

Journal Publications (peer-reviewed)

  1. S. Hu, C. D. Yuan, A. Castagnotto, B. Lohmann, S. Bouhedma, D. Hohlfeld, T. Bechtold, „Stable reduced order modeling of piezoelectric energy harvesting modules using implicit Schur complement”, accepted for publication in Microelectronics Reliability, (2018).
  2. (invited) M. Kudryavtsev, E.B. Rudnyi, J.G. Korvink, D. Hohlfeld, T. Bechtold, „Computationally efficient and stable order reduction methods for a large-scale model of MEMS piezoelectric energy harvester”, Microelectronics Reliability, 55(5), 747-757 (2015).
  3. T. M. Kamel, R. Elfrink, M. Renaud, D. Hohlfeld, M. Goedbloed, C. de Nooijer, M. Jambunathan and R. van Schaijk, "Modeling and characterization of MEMS-based piezoelectric harvesting devices," Journal of Micromechanics and Microengineering, 20, 105023, (2010).
  4. (invited) R. Elfrink, M. Renaud, T. M. Kamel, C. de Nooijer, M. Jambunathan, M. Goedbloed, D. Hohlfeld, S. Matova, V. Pop, L. Caballero and R. van Schaijk, “Vacuum packaged MEMS piezoelectric vibration energy harvesters”, Journal of Micromechanics and Microengineering 20, 104001(2010).
  5. T. Bechtold, D. Hohlfeld, E. B. Rudnyi , “Efficient extraction of thin film thermal parameters from numerical models via parametric model order reduction”, Journal of Micromechanics and Microengineering20, 045030, (2010).
  6. (invited) D. Hohlfeld, et al., “Mikrostrukturierte Energiewandler für autonome Sensorsysteme”, tm-Technisches Messen 76(12), 552-559, (2009).
  7. (invited) R. Elfrink, T. M. Kamel, M. Goedbloed, S. Matova, D. Hohlfeld, M. Renaud, R. van Schaijk, “Vibration energy harvesting with aluminum nitride-based piezoelectric devices”, Journal of Micromechanics and Microengineering19(9), 094005, (2009).
  8. B. Op het Veld, D. Hohlfeld, V. Pop, “Scavenging mechanical energy for ambient intelligent devices”, Information Systems Frontiers11, 7–18 (2009).
  9. D. Hohlfeld and H. Zappe, “Thermal and optical characterization of silicon-based tunable optical thin-film filters”, IEEE Journal of Microelectromechanical Systems 16(3), 500-511 (2007).
  10. D. Hohlfeld, T. Bechtold, and H. Zappe, “Tunable Optical Filter”, in: “Dimension Reduction of Large-Scale Systems” edited by: P. Benner, V, Mehrmann, D.C. Sorensen, Springer-Verlag, Berlin/Heidelberg, 2005.
  11. D. Hohlfeld and H. Zappe, “All-dielectric tunable optical filter based on the thermo-optic effect”, Journal of Optics A: Pure and Applied Optics6(6), 504-511 (2004).
  12. D. Hohlfeld, M.Epmeier and H. Zappe, “A thermally-tunable silicon-based optical filter”, Sensors and Actuators A: Physical103(1-2), 93–99 (2003).
  13. O. Ahrens, A. Buhrdorf, D. Hohlfeld, L. Tebje, and J. Binder, “Fabrication of Gap-Optimized CMUT”, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control49(9), 1321-1329 (2002).

Conference Publications (peer-reviewed)

  1. U. Verma, J. Bernhardt, D. Hohlfeld, „ Modeling and simulation of bioheat powered subcutaneous thermoelectric generator “,accepted for publication in Proc. European Conference on Modelling and Simulation, May 2018.
  2. S. Bouhedma, Y. Zheng, D. Hohlfeld, “Multiphysics modeling and simulation of a dual frequency energy harvester”, accepted for publication in Proc. European Conference on Modelling and Simulation, May 2018.
  3. O. S. Jadhav, C. D. Yuan, E. B. Rudnyi, D. Hohlfeld, T. Bechtold, “Nonlinear-Input Model Order Reduction of a Thermoelectric Generator for Electrically Active Implants”, accepted for publication in Proc. International Conference on Bioelectromagnetism (ICBEM), May 2018.
  4. C. D. Yuan, O. S. Jadhav, E. B. Rudnyi, D. Hohlfeld, T. Bechtold , “Parametric Model Order Reduction and System-level Simulation of a Thermoelectric Generator for Electrically Active Implants”, accepted for publication in Proc. EuroSimE, April 2018.
  5. J. Bernhardt, U. Verma, D. Hohlfeld, “Thermoelektrische Energieversorgung subkutaner Implantate”, GMM-Workshop Energieautonome Sensorsysteme, February 2018.
  6. S. Bouhedma, Y. Zheng, H. Hartwig, D. Hohlfeld, “Magnetic resonance frequency tuning of energy harvester with multiple operating frequencies”, GMM-Workshop Energieautonome Sensorsysteme, February 2018.
  7. J. Bernhardt, U. Verma, T. Bechtold, D. Hohlfeld, “ Entwurf eines thermoelektrischen Generators für elektrisch aktive Implantate”, ANSYS Conference, November 2017.
  8. T. Bechtold, D. Hohlfeld, “ Entwurf eines thermoelektrischen Generators für elektrisch aktive Implantate”, Proc. Mikrosystemtechnik-Kongress, October 2017, pp. 402-405.
  9. E. Sergeeva, H. Hartwig, D. Hohlfeld, “Optofluidische Küvetten mit integrierten optischen Polymerwellenleitern für Fluidanalyse auf Leiterplatten“, Proc. Mikrosystemtechnik-Kongress, October 2017, pp. 281-284.
  10. S. Bouhedma, D. Hohlfeld, “Frequency tunable energy harvester with segmented piezoelectric patches for improved power generation”, Proc. Mikrosystemtechnik-Kongress, October 2017, pp. 456-459.
  11. J. Schmidt, E. Sergeeva, H. Hartwig, D. Hohlfeld, “ Integration von SMD-LEDs in elektrisch-optische Leiterplatten für Sensoranwendungen”, Proc. Mikrosystemtechnik-Kongress, October 2017, pp. 828-831.
  12. E. Sergeeva, H. Hartwig, R. Schima, M. Paschen, D. Hohlfeld „Optical PCB-based Sensor Platform with Direct Laser Written Polymer Waveguides for Sea Water Measurements“, Conference on Optofluidics, June 2017.
  13. T. Bechtold, J. A. Pico Acevedo, D. Hohlfeld „Compact Model of a Wireless Power Transfer System“, IEEE Wireless Power Transfer Conference, May 2017.
  14. E. Sergeeva, H. Hartwig, D. Hohlfeld , “Laser direct writing of polymer optical waveguides and optofluidic systems on printed circuit boards” micro photonics International Congress, November 2016.
  15. J. A. Pico Acevedo, D. Hohlfeld, T. Bechtold, “Model Order Reduction for COMSOL - A Compact Model of a Wireless Power Transfer System”, COMSOL Conference, October 2016.
  16. D. Hohlfeld, D. Hoffmann, T. Bechtold, “Parameter and Topology Optimization of Microstructured Piezoelectric Energy Harvester”, ANSYS Conference, October 2016.
  17. T. Bechtold, D. Hohlfeld, “Air Cooling Simulation of High Performance Computing Platform with Integrated Polymer Waveguides”, ANSYS Conference, October 2016.
  18. H. Hartwig, E. Sergeeva, N. Thomas, D. Hohlfeld, “Precision laser direct writing of polymer optical waveguides and optofluidic systems”, International Conference on Applied Optics and Photonics, May 2016.
  19. (keynote) T. Bechtold, D. Hohlfeld, “Multi-Physical Simulation of High Performance Computing Platform Integrating Polymer Waveguides”, International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), April 2016.
  20. D. Hoffmann, T. Bechtold, D. Hohlfeld, “Design Optimization of MEMS Piezoelectric Energy Harvester”, International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), April 2016.
  21. D. Hoffmann, S. Bouhedma, T. Bechtold, D. Hohlfeld, “Entwurfsverfahren für piezoelektrische Energiewandler mit mehreren inhärenten Betriebsfrequenzen”, GMM-Workshop Energieautarke Sensorik, February 2016.
  22. E. Sergeeva, H. Hartwig, D. Hohlfeld, “Photopolymer-based optofluidic system on printed circuit boards”, micro photonics International Congress preview, November 2015.
  23. V. Balapuram, H. Hartwig, D. Hohlfeld, “Multi-scale multi-physical simulation of electro-optic circuit boards with multimodal polymer waveguides”, Proc. Mikrosystemtechnik-Kongress, October 2015.
  24. D. Hohlfeld, H. Hartwig, V. Balapuram, “Multi-physical Simulation of Electro-Optical Printed Circuit Boards with Multimodal Polymer-based Waveguides, EOS Conference on Optomechanical Engineering, June 2015.
  25. (best paper award) M. Kudryavtsev, E. B. Rudnyi, D. Hohlfeld, T. Bechtold, “Computationally Efficient and Stable Order Reduction Methods for a Large-Scale Model of MEMS Piezoelectric Energy Harvester”, ANSYS Conference, June 2015.
  26. M. Kudryavtsev, D. Hohlfeld, E. B. Rudnyi, T. Bechtold, J. G. Korvink , “Structure Preserving Model Order Reduction and System Level Simulation of MEMS Piezoelectric Energy Harvester”, Proc. Electronics System-Integration Technology Conference, September 2014, pp.
  27. F. Sayed, D. Hohlfeld, M. Eker, E. B. Rudnyi, T. Bechtold, and J. G. Korvink, “Enabling efficient design of Self-Supplied SSHI-circuit for Piezoelectric MEMS Energy Harvester”, Proc. Mikrosystemtechnik-Kongress, October 2013, pp. 103-106.
  28. D. Hohlfeld, et al., „Mikrostrukturierte Energiewandler für energieautonome Sensoren“, Jubiläumsausgabe der Multiprojekt-Chip-Gruppe Baden-Württemberg: MPC,.July 2013, pp. 11-17.
  29. F. Sayed, D. Hohlfeld, T. Bechtold, J. G. Korvink “System level simulation of a Reduced Order Model for a MEMS Piezoelectric Energy Harvester with a self-supplied SECE-circuit”, Proc. 6th ECCOMAS Conference on Smart Structures and Materials (SMART2013), June 2013.
  30. F. Sayed, T. Aftab, M. Eker, D. Hohlfeld, T. Bechtold, J. G. Korvink, “Reduced Order Modeling Enables System Level Simulation of a MEMS Piezoelectric Energy Harvester with a Self-Supplied SSHI-Scheme”, Proc. International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), April 2013.
  31. T. Aftab, D. Hohlfeld, E. B. Rudnyi, T. Bechtold, J. G. Korvink, "New Modelling approach for micro energy harvesting systems based on model order reduction enabling truly system-level simulation", Proc. Micromechanics and Microsystems Europe, September 2012.
  32. D. Hohlfeld. J. Schwager, „Multi-resonante mikrostrukturierte piezoelektrische Energiewandler“, Proc. 1. Elektronik energy harvesting congress, July 2012.
  33. D. Hohlfeld, T. Bechtold, E. Rudnyi, R van Schaijk, “System-level simulation and verification of a MEMS-based piezoelectric energy harvesting module”, Proc. Mikrosystemtechnik-Kongress, October 2011, pp. 972-975.
  34. G. Altena, D. Hohlfeld, et al., “Design, modeling, fabrication and characterization of an electret based MEMS electro-static energy harvester”, Proc. Transducers, June 2011, pp. 739-742.
  35. T. Bechtold, D. Hohlfeld, E. B. Rudnyi, “System-level model of electrothermal microsystem and temperature control circuit”, Proc. EuroSimE, April 2011, pp. 1/5 – 5/5.
  36. M. Jambunathan, D. Hohlfeld, K. Karakaya, R. Elfrink and R.van Schaijk, “Reactive Sputter Deposition of PZT thin film for resonance frequency tuning of MEMS vibration energy harvesters”, Proc. PowerMEMS, Leuven, Belgium, 2010, p. 383-386.
  37. D. Hohlfeld, R. Vullers, R. van Schaijk, “Mikrostrukturierte Energiewandler für energieautonome Sensoren“, Tagungsband zum Workshop der Multiprojekt-Chip-Gruppe Baden Württemberg, Reutlingen, 2010, p. 85-92.
  38. R. Elfrink, V. Pop, D. Hohlfeld, T. M. Kamel, S. Matova, C. de Nooijer, M. Jambunathan, M. Goedbloed, L. Caballero, M. Renaud and R. van Schaijk, “First autonomous wireless sensor node powered by a vacuum-packaged piezoelectric MEMS energy harvester”, Proc. IEDM, December 2009.
  39. R. Elfrink, M. Renaud, T. M. Kamel, C. de Nooijer, M. Jambunathan, M. Goedbloed, D. Hohlfeld, S. Matova and R. van Schaijk, “Vacuum packaged MEMS piezoelectric vibration energy harvesters”, Proc. PowerMEMS, December 2009, pp. 67-70.
  40. S. Matova, D. Hohlfeld, R. van Schaijk, C. Welham, S. Rouvillois, “Experimental Validation of Aluminum Nitride Energy Harvester Model with Power Transfer Circuit ”, Proc. Eurosensors, September 2009, pp. 1443-1446.
  41. T. Bechtold, D. Hohlfeld, E. B. Rudnyi , “Efficient extraction of thin film thermal properties via parametric model order reduction and optimization”, Proc. Transducers, June 2009, pp. 2437-2440.
  42. (invited) D. Hohlfeld, et al. “Overview and challenges for energy harvesters using microsystem technology”, Proc. Energy Harvesting and Storage Europe, June 2009.
  43. D. Hohlfeld, S. Matova, R. van Schaijk, “System-level Modeling and simulation of a frequency tunable electrostatic energy harvester”, Proc. EuroSimE (keynote presentation), April 2009, pp. 754-760.
  44. T. Bechtold, D. Hohlfeld, E. B. Rudnyi, “Efficient Solution of Inverse Thermal Problem via Parametric Model Order Reduction”, Proc. EuroSimE, April 2009, pp. 101-106.
  45. T. M. Kamel, R. Elfrink, D. Hohlfeld , M. Goedbloed, C. de Nooijer, M. Jambunathan, R. van Schaijk, “MEMS-based Aluminuim Nitride Piezoelectric Energy Harvesting Module”, Proc. Smart Systems Integration – SSI, 2009.
  46. (invited) D. Hohlfeld, et al., “Mikrostrukturierte Energiewandler für autonome Sensorsysteme”, GMM-Workshop Energieautarke Sensorik, November 2008.
  47. R. Elfrink, M. Goedbloed, S. Matova, T. M. Kamel, D. Hohlfeld, R. van Schaijk, „Vibration energy harvesting with AlN piezoelectric devices“, Proc. PowerMEMS, 2008, pp. 249-252.
  48. D. Hohlfeld, G. Altena, M. Goedbloed, R. van Schaijk, „A New Gap-Closing Electrostatic Vibrational Energy Harvester Employing Electrodes Vertically Integrated with a Seismic Mass“, Proc. MicroMechanics Europe, September 2008, pp. 185-188.
  49. V. Pop, D. Hohlfeld, R. Elfrink, R. Vullers, “Energy harvester and Li battery systems for wireless sensors”, Proc. International Meeting for Lithium Batteries, June 2008.
  50. D. Hohlfeld, R. J. M. Vullers, J. de Boeck, “An electromagnetic scavenger for non-resonant and low frequency excitation”, Proc. Smart Systems Integration – SSI, 2008, pp. 225-232.
  51. V. Pop, D. Hohlfeld, R.J.M. Vullers, J. De Boeck, “Smart Sensor Networks for Hybrid Electrical Vehicle Applications”, Proc. International Electric Vehicle Symposium - EVS-23, 2007.
  52. D. Hohlfeld, B. Op het Veld, R. J. M. Vullers, J. de Boeck, “Coupled-domain modelling of electrostatic energy scavengers and power management circuitry for optimum load matching”, Proc. PowerMEMS, 2007, pp. 335-338.
  53. D. Hohlfeld, G. Altena, N. E. Ghouti, V. Pop, R. J. M. Vullers, J. De Boeck, “Energy scavengers for wireless autonomous sensor nodes”, Proc. Mikrosystemtechnik-Kongress 2007, pp. 777-780.
  54. Z. Wang, V. Leonov, D. Hohlfeld and R. Vullers, “Micromachined Thermopiles as Power Sources for Sensors on Human Body”, Proc. SENSATION 2nd International Conference, 2007, paper 2261.
  55. V. Pop, R.J.M. Vullers, D. Hohlfeld, T. Sterken, A. Schmitz, J. De Boeck, “Wireless Autonomous Transducer Solutions for Hybrid Electrical Vehicle Applications”, Ecological Vehicles & Renewable Energies International Conference – EVER, 2007, paper EVER07-43.
  56. G. Altena, et al., Electrostatic energy scavengers for wireless autonomous sensor networks, Proc. Smart Systems Integration – SSI, 2007, pp. 359-366.
  57. F. Schneider, D. Hohlfeld and U. Wallrabe, “Optimisation of a hydraulic ferrofluid actuator”, Proc. Actuator, 2006, pp. 124-127.
  58. (invited) D. Hohlfeld and H. Zappe, “Amorphous silicon as an active material in optical resonators”, Materials Research Society Symposium Proc. 910, 2006, paper 0910-A17-01.
  59. D. Hohlfeld and H. Zappe, “Silicon-based tunable optical thin-film filters”, Proc. Mikrosystemtechnik Kongress, 2005, pp. 187-190.
  60. F. Schneider, D. Hohlfeld, W. Vogel and U. Wallrabe, “Evaluation von Ferrofluiden für hydraulische Aktoren”, Proc. Mikrosystemtechnik Kongress, 2005, pp.831-834.
  61. T. Bechtold, D. Hohlfeld, E. B. Rudnyi, H. Zappe and J. G. Korvink, “Inverse thermal problem via model order reduction: Determining material properties of a microhotplate”, Proc. International Workshop on Thermal Investigations of ICs and Systems – Therminic, 2005, pp. 146-150.
  62. D. Hohlfeld and H. Zappe, “Thermally tunable optical thin-film filters with sub-nanometer resolution and 41.7 nm continuous tuning range”, Proc. IEEE International Micro Electro Mechanical Systems Conference – MEMS, 2005, pp. 100-103.
  63. D. Hohlfeld and H. Zappe, “Analytical model for improving the performance of MEMS-based tunable optical filters”, Proc. 10th Micro-optics Conferences, 2004, paper L-33.
  64. D. Hohlfeld and H. Zappe, “A MEMS-based all-dielectric tunable optical filter with increased tuning range”, Proc. SPIE, MEMS, MOEMS and Micromachining, Vol. 5455, 2004, pp. 228-239.
  65. D. Hohlfeld and H. Zappe, “Hybrid optical assembly technique for tunable optical filter arrays”, Proc. IEEE/LEOS International Conference on Optical MEMS, 2003, pp. 34-35.
  66. D. Hohlfeld and H. Zappe, “Micro-machined tunable optical filters with optimized band-pass spectrum”, Proc. Transducers, 2003, pp. 1494-1497.
  67. D. Hohlfeld, M. Epmeier and H.  Zappe, ”Thermally-tunable optical filter array”, Proc. SPIE, Optical Devices for Fiber Communication IV, Vol. 4989, 2003, pp. 143-154.
  68. D. Hohlfeld and H. Zappe, “A silicon-based optical filter designed for low power consumption and fast thermal modulation”, Proc. 2002 IEEE/LEOS International Conference on Optical MEMS, 2002, pp. 171-172.
  69. D. Hohlfeld, M. Epmeier and H. Zappe, “Tunable thermo-optic filter for WDM applications”, Proc. International Micro Electro Mechanical Systems Conference – MEMS, 2002, pp. 564-567.
  70. O. Ahrens, D. Hohlfeld, A. Buhrdorf, O. Glitza, J. Binder, “A new class of capacitive micromachined ultrasonic transducers”, Proc. IEEE Ultrasonics Symposium. vol. 1, 2000, pp. 939-942.