Book Chapters
- 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).
- 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)
- 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).
- (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).
- 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).
- (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).
- 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).
- (invited) D. Hohlfeld, et al., “Mikrostrukturierte Energiewandler für autonome Sensorsysteme”, tm-Technisches Messen 76(12), 552-559, (2009).
- (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).
- B. Op het Veld, D. Hohlfeld, V. Pop, “Scavenging mechanical energy for ambient intelligent devices”, Information Systems Frontiers11, 7–18 (2009).
- 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).
- 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.
- 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).
- D. Hohlfeld, M.Epmeier and H. Zappe, “A thermally-tunable silicon-based optical filter”, Sensors and Actuators A: Physical103(1-2), 93–99 (2003).
- 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)
- 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.
- 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.
- 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.
- 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.
- J. Bernhardt, U. Verma, D. Hohlfeld, “Thermoelektrische Energieversorgung subkutaner Implantate”, GMM-Workshop Energieautonome Sensorsysteme, February 2018.
- 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.
- J. Bernhardt, U. Verma, T. Bechtold, D. Hohlfeld, “ Entwurf eines thermoelektrischen Generators für elektrisch aktive Implantate”, ANSYS Conference, November 2017.
- T. Bechtold, D. Hohlfeld, “ Entwurf eines thermoelektrischen Generators für elektrisch aktive Implantate”, Proc. Mikrosystemtechnik-Kongress, October 2017, pp. 402-405.
- E. Sergeeva, H. Hartwig, D. Hohlfeld, “Optofluidische Küvetten mit integrierten optischen Polymerwellenleitern für Fluidanalyse auf Leiterplatten“, Proc. Mikrosystemtechnik-Kongress, October 2017, pp. 281-284.
- S. Bouhedma, D. Hohlfeld, “Frequency tunable energy harvester with segmented piezoelectric patches for improved power generation”, Proc. Mikrosystemtechnik-Kongress, October 2017, pp. 456-459.
- 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.
- 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.
- T. Bechtold, J. A. Pico Acevedo, D. Hohlfeld „Compact Model of a Wireless Power Transfer System“, IEEE Wireless Power Transfer Conference, May 2017.
- 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.
- 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.
- D. Hohlfeld, D. Hoffmann, T. Bechtold, “Parameter and Topology Optimization of Microstructured Piezoelectric Energy Harvester”, ANSYS Conference, October 2016.
- T. Bechtold, D. Hohlfeld, “Air Cooling Simulation of High Performance Computing Platform with Integrated Polymer Waveguides”, ANSYS Conference, October 2016.
- 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.
- (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.
- 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.
- D. Hoffmann, S. Bouhedma, T. Bechtold, D. Hohlfeld, “Entwurfsverfahren für piezoelektrische Energiewandler mit mehreren inhärenten Betriebsfrequenzen”, GMM-Workshop Energieautarke Sensorik, February 2016.
- E. Sergeeva, H. Hartwig, D. Hohlfeld, “Photopolymer-based optofluidic system on printed circuit boards”, micro photonics International Congress preview, November 2015.
- 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.
- 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.
- (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.
- 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.
- 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.
- D. Hohlfeld, et al., „Mikrostrukturierte Energiewandler für energieautonome Sensoren“, Jubiläumsausgabe der Multiprojekt-Chip-Gruppe Baden-Württemberg: MPC,.July 2013, pp. 11-17.
- 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.
- 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.
- 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.
- D. Hohlfeld. J. Schwager, „Multi-resonante mikrostrukturierte piezoelektrische Energiewandler“, Proc. 1. Elektronik energy harvesting congress, July 2012.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- (invited) D. Hohlfeld, et al. “Overview and challenges for energy harvesters using microsystem technology”, Proc. Energy Harvesting and Storage Europe, June 2009.
- 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.
- 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.
- 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.
- (invited) D. Hohlfeld, et al., “Mikrostrukturierte Energiewandler für autonome Sensorsysteme”, GMM-Workshop Energieautarke Sensorik, November 2008.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- G. Altena, et al., Electrostatic energy scavengers for wireless autonomous sensor networks, Proc. Smart Systems Integration – SSI, 2007, pp. 359-366.
- F. Schneider, D. Hohlfeld and U. Wallrabe, “Optimisation of a hydraulic ferrofluid actuator”, Proc. Actuator, 2006, pp. 124-127.
- (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.
- D. Hohlfeld and H. Zappe, “Silicon-based tunable optical thin-film filters”, Proc. Mikrosystemtechnik Kongress, 2005, pp. 187-190.
- F. Schneider, D. Hohlfeld, W. Vogel and U. Wallrabe, “Evaluation von Ferrofluiden für hydraulische Aktoren”, Proc. Mikrosystemtechnik Kongress, 2005, pp.831-834.
- 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.
- 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.
- 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.
- 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.
- 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.
- D. Hohlfeld and H. Zappe, “Micro-machined tunable optical filters with optimized band-pass spectrum”, Proc. Transducers, 2003, pp. 1494-1497.
- 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.
- 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.
- 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.
- 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.