NPS Physics Research - Grbovic - Physics
Professor Dragoslav Grbovic
Associate Professor of Physics
Phone: (831) 656-2276 | Email: firstname.lastname@example.org
Professor Dragoslav Grbovic has extensive experience in microfabrication of MEMS bi-material infrared sensors and expertise in finite element modeling of MEMS devices. His research also includes metamaterials in the THz and Microwave regime for enhanced absorption for various applications as well as building novel materials and sensors using carbon and other nanotubes.
Current Research Programs
Microwave Metamaterials and Metasurfaces
In this research, we utilize novel methods, such as printing with conductive inks or additive manufacturing (3D printing) to rapidly produce very effective, low cost metasurfaces. These surfaces are highly absorptive in the microwave regime and can be used for electromagnetic shielding and other applications.
These metamaterials are very simple in structure, with layer of solid metal and layer of patterned metal separated by a dielectric, structural layer.
In this project, we design, microfabricate and test MEMS THz focal plane arrays. Using structurally similar metasurfaces as for microwave (except much smaller in size), we achieve almost perfect absorption in THz wavelenghts. THz imaging has many applications for security, medicine and industry.
MEMS Microactuators are microscopically-sized devices that use electric actuation to achieve tiny displacements and actuate micro-size machinery. Our work involves optimization of such device to maximize their efficiency and decrease energy requirements while improving robustness and reliabiliity.
MEMS Radiation Detectors
Building small, low-cost, disposable sensors for gamma and neutron radiation. This project uses MEMS microfabrication techniques as well as novel printed-electronics techniques and incorporates carbon and boron nitride nanotuves to produce sensors that are able to reliably detect neutron and gamma radiation while utilizing minimum energy and size footprint.
LT Daniel Sloan | Email: email@example.com
LT Sloan works on harvesting energy from heat-generating objects, such as gasoline power generators. This process promisses to re-capture some of the heat that is otherwise wasted to the environment. Anotehr benefit of this energy capture is reduction of the heat signature of these generators.
LT Matthew Henricks | Email: firstname.lastname@example.org
LT Henricks works on characterization of metamaterials and assessing how employing printed metasurfaces decrease coupling of microwave radiation within cavities.
ENS Christian Stiker | Email: email@example.com
ENS Stiker works on optimizing the process of deposition of piezoelectric films using spin-coating. Having this process available greatly enhances NPS capabilities to produce MEMS sensors and actuators.
ENS Sean Furgiuele | Email: firstname.lastname@example.org
ENS Furgiuele works on testing feasibility of building hydrophones using thin carbon nanotube sheets.
Available Thesis Topics
Optimization of MEMS Microactuators for Fuzing Applications
Additive Manufacturing of Shielded UAV Components
Design and Characterization of MEMS Radiation Detectors
- Electrically Conductive CNT Composites at Loadings below Theoretical Percolation Values
B Earp, J Simpson, J Phillips, D Grbovic, S Vidmar, J McCarthy, CC LuhrsNanomaterials 9 (4), 491
- MEMS terahertz-to-infrared band converter using frequency selective planar metamaterial
F Alves, L Pimental, D Grbovic, G KarunasiriScientific reports 8 (1), 12466
- Application of equivalent medium parameters in finite element models of microwave metamaterials
C Hewitt, F Alves, J Luscombe, D GrbovicJournal of Applied Physics 123 (11), 115101