A5064697126- Shape Memory Alloy Transformations
- Advanced MEMS and NEMS Technologies
- Mechanical and Optical Resonators
- Antenna Design and Optimization
- Magnetic and transport properties of perovskites and related materials
- Piezoelectric Actuators and Control
- Magnetic Properties and Applications
- Semiconductor materials and devices
- Metal and Thin Film Mechanics
- Ferroelectric and Piezoelectric Materials
- Photonic and Optical Devices
- Microwave Engineering and Waveguides
- Thermal properties of materials
- Aeroelasticity and Vibration Control
- Electromagnetic Compatibility and Noise Suppression
- Advanced Thermoelectric Materials and Devices
Siemens (Germany)
2018-2019
Karlsruhe Institute of Technology
2014-2017
Ikerbasque
2017
Basque Center for Materials, Applications and Nanostructures
2017
Cooling and thermal management comprise a major part of global energy consumption. The by far most widespread cooling technology today is vapor compression, reaching rather high efficiencies, but promoting warming due to the use environmentally harmful refrigerants. For emerging applications using microelectronics micro-electro-mechanical systems, thermoelectrics advanced technology, which however hardly reaches coefficients performance (COP) above 2.0. Here, we introduce new approach for...
This paper suggests the usage of an optimized structure embedded wafer-level ball grid array technology for millimeter-wave antennas-in-package. Multiple antenna arrays in a second redistribution layer have been designed, evaluated, and integrated with different transceivers to form very compact sensor packages 61- 122-GHz radar applications. The resulting contain complete front end while featuring dimensions 8 mm × mm. are easy assemble replaceable. Theoretical considerations, numerical...
We report on the fabrication and in-situ characterization of temperature-dependent electrical resistance deflection characteristics free-standing NiMnGa/Si bimorph cantilevers with a NiMnGa layer thickness 200 nm minimum lateral width 50 nm. The martensitic transformation in initial films nanomachined proceeds wide temperature range hardly detectable hysteresis below 1 K. This remarkable behavior is ascribed to internal stress system that exceeds limit critical point terminating...
We present the design, fabrication and characterization of a novel integrated optical switch with ultra-small footprint 1 μm2 based on shape memory alloy (SMA)-silicon-bimorph NEMS actuator. Finite element simulations reveal operation principle device expected switching ratios. A lithographic nanoscale process has been successfully implemented first measurements show an on-off ratio 9 dB.
Belonging to the group of Smart Materials, Shape Memory Alloys (SMAs) generate large work outputs per volume density, especially in small dimensions. Furthermore, they exhibit multifunctional performance and provide biocompatibility. Hence, shape memory alloys are predestined for applications on nanoscale. This presents fabrication, characterization NiMnGa/Si bimorph double beam nanoactuators their integration within a Si-photonics on-chip waveguide structure.
Abstract The deployment of MEMS relay for high power switching applications requires a matrix-like arrangement many single units. For consistent performance the sameness individual switches representing array is crucial. We present design, simulation and fabrication based on silicon-on-insulator (SOI) technology. measurement results show accordance with simulations confirming predictability thereby homogeneity SOI-based relays.