Christos K. Manavis
Email: eepgckm@brunel.ac.uk
Office: TD303, Tower D
PhD Supervisor: Prof. Wamadeva Balachandran (Bala)
Research Area: Nanodevices
Sponsoring Organization: Alexandreio Institute of Technology, Thessaloniki, Greece
Academic Qualification:
- B.Sc Electrical Engineering Pratt Institute, Brooklyn, NY, USA
- M.Sc Electrical Engineering Polytechnic Institute of New York, Brooklyn, NY, USA
Research Interests: Semiconducting Superlattices and Heterostructures- Nanodevices of Reduced Dimensionality -Ultrasound Generation-EM Transducers
PhD Research:
Modern developments in epitaxial growth and modulation doping of nanostructures have given rise to the creation of many exciting novel electronic nanodevices over the last 30 years, which are used currently in the areas of Imaging, Elecro-optics, Electroacoustics, Lasers, Wireless Networking and Telecommunications, Signal Processing etc. We intend to explore the direct electromagnetic generation of monochromatic high frequency acoustic waves, which arise from an optimized periodic space charge layer semiconducting superlattice structure [Fig. 2], when triggered by an EM pulse [Fig. 1]. Using the basic mechanism of ion-electron coupling in semiconductors and solving the coupled Maxwell state equations for this physical system with appropriate boundary conditions we will determine the Scattering Matrix S(ω), Impedance Z(ω), Reflectance R(ω) , Transmittance T(ω) and Power Gain G(ω) functions both analytically and numerically and thus simulate the behavior of this nanodevice and calculate its resonances. Using our results we will optimize the performance of this transducer as a function of various characteristics (materials parameters, thicknesses and various geometrical characteristics, periodic vs. aperiodic arrangements of layers, various damping mechanisms etc) and we will calculate the gain and the stability of the device’s resonating behaviour using standard matrix response analysis for the calculation of the transfer function of the system.
Fig 1
Fig 2
