Senior Lecturer Gr II
Ph.D. in Physics (Georgia State University, Atlanta, Georgia, USA)
MS
M.Phil. in Plysics (Post-Graduate Institute of Science, Peradeniya, Sri Lanka)
B.Sc. Hons in Physics, Chemistry and Mathematics (Peradeniya)
Email :rasanga@uwu.ac.lk
Phone : +94 553559113
Nanayakkara, T., U. Wijewardena, S. Withanage, A. Kriisa, R. Samaraweera and R. Mani. “Strain relaxation in different shapes of single crystal graphene grown by chemical vapor deposition on copper.” Carbon 168, 684-690 (2020).
. Samaraweera, R.L., Gunawardana, B., Nanayakkara, T.R. et al. Study of narrow negative magnetoresistance effect in ultra-high mobility GaAs/AlGaAs 2DES under microwave photo-excitation. Sci Rep 10, 781 (2020). https://doi.org/10.1038/s41598-019-57331-9
U. K. Wijewardena, T. Nanayakkara, R. Samaraweera, S. Withanage, A. Kriisa, and R. G. Mani. Effects of Long-Time Current Annealing to the Hysteresis in CVD Graphene on SiO2. MRS Advances, 1-8 (2019).
Rasanga L. Samaraweera, Binuka Gunawardana, Annika Kriisa, Tharanga Nanayakkara, Rasadi Munasinghe, Christian Reichl, W. Wegscheider and Ramesh G. Mani. Influence of microwave excitation power on the narrow negative magnetoresistance effect about B~0 T in the ultra-high mobility GaAs/AlGaAs 2DES. Physica Status Solidi B: 256 (6),1800610. DOI: 10.1002/pssb.201800610, (2019).
Annika Kriisa, Rasanga L. Samaraweera, M.S. Heimbeck, Henry Everitt, Christian Reichl, Werner Wegscheider, and Ramesh G. Mani. Cyclotron resonance in the high mobility GaAs/AlGaAs 2D electron system over the microwave, mm-wave, and terahertz- bands. Scientific Reports (9) 2409, DOI:10.1038/s41598-019-39186-2 (2019).
Rasanga. L. Samaraweera, H.-C. Liu, B. Gunawardana, A. Kriisa, C. Reichl, W. Wegscheider, and R. G. Mani: Coherent backscattering in quasi-ballistic ultra-high mobility GaAs/AlGaAs 2DES. Scientific Reports 8(1)., DOI:10.1038/s41598-018-28359-0, (2018).
T. R. Nanayakkara, R. L. Samaraweera, B. Gunawardana, C. R. Munasinghe, A. Kriisa, R. G. Mani, C. Reichl, and W. Wegscheider: Electron heating induced by microwave photoexcitation in the GaAs/AlGaAs two-dimensional electron system. Phys. Rev. B 98, 035304, (2018).
C. R. Munasinghe, B. Gunawardana, R. L. Samaraweera, Z. Wang, T. Nanayakkara, A. Kriisa, C. Reichl, W. Wegscheider, and R. Mani: Electron heating induced by an ac-bias current in the regime of Shubnikov-de Haas oscillation in high mobility GaAs/AlGaAs two-dimensional electron system. Journal of Physics: Condensed Matter, (2018).
R. L. Samaraweera, H.-C. Liu, Z. Wang, C. Reichl, W. Wegscheider, R. G. Mani: Mutual influence between current-induced giant magnetoresistance and radiation-induced magnetoresistance oscillations in the GaAs/AlGaAs 2DES. Scientific Reports, 7(1)., DOI:10.1038/s41598-017-05351-8, (2017).
R. L. Samaraweera, H. C-Liu, Z. Wang, W. Wegscheider, R. G. Mani: Extraction of overlapping radiation-induced magnetoresistance oscillations and bell-shaped giant magnetoresistance in the GaAs/AlGaAs 2DES using a multiconduction model. Journal of Physics Conference Series; 864(1):012050., DOI:10.1088/1742-6596/864/1/012050, (2017).
A. Kriisa, H-C Liu, R. L. Samaraweera, M. S. Heimbeck, H. O. Everitt, W. Wegscheider, R. G. Mani: Remotely sensed in microwave irradiated GaAs/AlGaAs two-dimensional electron system. Journal of Physics Conference Series; 864(1):012057., DOI:10.1088/1742-6596/864/1/012057, (2017).
Han-Chun Liu, Rasanga L. Samaraweera, C. Reichl, W. Wegscheider, R. G. Mani: Evolution of the frequency-dependent polarization-angle phase-shift in the microwave radiation-induced magnetoresistance oscillations. Journal of Physics Conference Series; 864(1):012056., DOI:10.1088/1742-6596/864/1/012056, (2017).
Binuka Gunawardana, Han-Chun Liu, Rasanga L. Samaraweera, C. Reichl, W Wegscheider, R.G. Mani: Behaviour of Bichromatic Microwave Induced Magnetoresistance Oscillations in the High Mobility GaAs/AlGaAs 2D Electron System. Journal of Physics Conference Series; 864(1):012055., DOI:10.1088/1742-6596/864/1/012055, (2017).
Binuka Gunawardana, H.-C. Liu, R. L. Samaraweera, M. S. Heimbeck, H. O. Everitt, J. Iñarrea, C. Reichl, W. Wegscheider, R. G. Mani: Millimeter wave radiation-induced magnetoresistance oscillations in the high-quality GaAs/AlGaAs 2D electron system under bichromatic excitation. Physical Review B 95, (19), 195304; DOI:10.1103/PhysRevB.95.195304, (2017).
Han-Chun Liu, Rasanga L. Samaraweera, R. G. Mani, C. Reichl, W. Wegscheider: Angular phase shift in polarization-angle dependence of microwave-induced magnetoresistance oscillations. Physical Review B 94, (24), 245312; DOI:10.1103/PhysRevB.94245312, (2016).
Zhuo Wang, R. L. Samaraweera, C. Reichl, W. Wegscheider, R. G. Mani: Tunable electron heating induced giant magnetoresistance in the high mobility GaAs/AlGaAs 2D electron system. Scientific Reports 6, 38516; DOI:10.1038/srep38516, (2016).
Rasanga L. Samaraweera, K. Premaratne, E. V. A. Premalal: A study of the use of plant pigments in dye-sensitized solar cells. Ceylon Journal of Sciences (Physical Sciences), 12, (51-56) (2007).
Director, Postgraduate Unit, Uva Wellassa University of Sri Lanka- Feb 2022 to present
Coordinator: Analytical Service Centre, Uva Wellassa University-2020 to present
Coordinator: 5th International Research Conference of Uva Wellassa University of Sri Lanka-IRCUWU2021, 1st, and 2nd July 2021.
President: Sri Lankan Student Association at Georgia State University, (ISAC)-GSU, Atlanta, USA. (2017-2018).
Vice President: Physics Graduate Student Association -PGSA, Department of Physics and Astronomy, GSU, Atlanta, USA. (2016-2017).
Member-American Physical Society (Since 2015)
Member-American Vacuum Society (Since 2013)
Joseph H Hadley Outstanding Advanced Graduate Student in Physics- Dept. of Physics and Astronomy, GSU, USA, (2017/2018).
Best Speaker award: PGSA Conference-Fall 2016, Department of Physics and Astronomy, Georgia State University, USA, (2016).
