Prof. A. G. Unil Perera

Georgia State University, USA

Email: uperera@gsu.edu

Qualifications

1987  Ph.D., University of Pittsburgh, USA

1983  M.Sc.,University of Pittsburgh, USA

1981  B.Sc.,University of Colombo, USA

Publications (Selected)

1. “The effect of reactor pressure on the electrical and structural properties of InN epilayers grown by HPCVD” M. K. I. Senevirathna, S. Gamage, R. Atalay, A. R. Acharya, A. G. U. Perera, N. Dietz, M. Buegler, A. Hoffmann, L. Su, A. Melton, I. Ferguson, J. Vac. Sci. Technol. A 30, 031511 (2012)
2. “Photovoltaic Infrared Detection with p-type Graded Barrier Heterostructures” P.K.D.D.P. Pitigala, S. G. Matsik, A. G. U. Perera , S. P. Khanna, L. H. Li, E. H. Linfield, Z. R. Wasilewski, M. Buchanan, and H. C Liu , Journal of Applied. Physics 111, 084505 (2012)
3. “High-performance, long-wave (~10.2µm) InGaAs/GaAs quantum dot infrared photodetector with quaternary In0.21Al0.21Ga0.58As capping”, Subhananda Chakrabarti, Sourav Adhikary, Nilanjan Halder, Yigit Aytac, and A. G. U. Perera, Applied Physics Letter. 99, 181102 (2011)
4. “Design of resonant-cavity-enhanced multi-band photodetectors”,Y. Lao, G. Ariyawansa, and A. G. U. Perera, Journal of Applied. Physics 110, 043112 (2011)
5. “Dielectric function model for p-type semiconductor inter-valence band transitions”, Yan-Feng Lao and A. G. Unil Perera, Journal of Applied Physics 109, 103528 (2011)
6. “Effects of Graded Barriers on the Operation of Split-Off Band Infrared Detectors”, A. G. U. Perera, S. G. Matsik, D.P. Pitigala, Y.F Lao, S. Khanna, L.H.Li, E.Linfield, Z.R.Wasilewski, M.Buchanan, X.H.Wu, and H.C.Liu., Infrared Phys. Technol. 54 296-301 (2011).
7. “Highly sensitive GaAs/AlGaAs heterojunction bolometer ”, P.K.D.D.P. Pitigala, P.V.V.Jayaweera, S.G.Matsik, A.G.U.Perera and H.C.Liu, Sensors and Actuators A 167 245-248 (2011)
8. “Heterojunction plasmonic midinfrared detectors”, M. S. Shishodia and A. G. Unil Perera, Journal of Applied Physics 109, 043108 (2011).
9. “Surface plasmon enhanced IR absorpotion: Design and experiment”, M.S. Shishodia, P.V.V. Jayaweera, S.G. Matsik, A.G.U. Perera, H.C. Liu, M. Buchanan, Photonics and Nanostructures- Fundamentals and Applications 9, 95-100 (2011).
10. “Five Band Bias-Selectable Integrated Quantum Well Detector in an n-p-n Architecture”, G. Ariyawansa, Y. Aytac, A. G. U. Perera, S. G. Matsik, M. Buchanan, Z. R. Wasilewski, and H. C. Liu, Appl. Phys. Lett.97, 231102 (2010).
11. “Light-hole and heavy-hole transitions for high-temperature long-wavelength infrared detection”, Y.F. Lao, P.K.D.D.P. Pitigala, A.G.U. Perera, H.C. Liu, M.Buchanan, Z.R. Wasilewski, K.K. Choi,and P. Wijewarnasuriya. Appl. Phys. Lett.97, 091104 (2010).
12. “Low cost PbS quantum dot sensitized ZnO UV-IR dual band detectors”, P. V. V. Jayaweera, J. Shao, P. K. D. D. P. Pitigala, K. Tennakone, A. G. U. Perera, P. M. Jayaweera, and J. Baltrusaitis, IEEE Trans. Electron Devices. 57 (10) 2756 (2010).
13. “Light-hole and heavy-hole transitions for high-temperature long-wavelength infrared detection”, Y. F. Lao, P. K. D. D. P. Pitigala, A. G. U. Perera, H. C. Liu, M. Buchanan, Z. R. Wasilewski, K. K. Choi, and P. Wijewarnasuriya,  Appl. Phys. Lett. 97, 091104 (2010).
14. “Low-Cost UV-IR Dual Band Detector Using Nonporous ZnO Film Sensitized by PbS Quantum Dots”, SHAO Jia-Feng, A. G. U. Perera, P. V. V. Jayaweera, and HE De-Yan, Chin. Phys. Lett. 27, 027302 (2010).
15. “Analysis of Dark Current Mechanisms for Split-Off Band Infrared Detectors at High Temperatures”, Y. F. Lao, P. V. V. Jayaweera, S. G. Matsik, and A. G. U. Perera,  IEEE Trans. Electron Devices 57, 1230 (2010)
16. “High-performance quantum ring detector for the 1–3 terahertz range”, S. Bhowmick, G. Huang, W. Guo, C. S. Lee, P. Bhattacharya, G. Ariyawansa, and A. G. U. Perera, Appl. Phys. Lett. 96, 231103 (2010).
17. “Polarization Sensitivity of Quantum Well Infrared Photodetector Coupled to a Metallic Diffraction Grid”, V. Apalkov, G. Ariyawansa, A. G. U. Perera, M. Buchanan, Z. R. Wasilewski, and H. C. Liu, IEEE J. Quantum Electron. 46, 877-883 (2010).
18. “Quantum Dot Nanostructures for Multi-Band Infrared Detection”, A. G. U. Perera, G. Ariyawansa, G. Huang, and P. Bhattacharya, Infrared Phys. Technol. 52, 252–256 (2009).
19. “Operating temperature and the responsivity of split-off band detectors”, A. G. U. Perera, P. V. V. Jayaweera, S. G. Matsik, M. Buchanan, Z. R. Wasilewski, and H. C. Liu, Infrared Phys. Technol.  52, 241–246 (2009).
20. “Device Modeling for Split-off Band Detectors”, S. G. Matsik, P. V. V. Jayaweera, A. G. U. Perera, K. K. Choi, and P. Wijewarnasuriya, J. Appl. Phys. 106, 064503 (2009).
21. “Negative Capacitance in GaN/AlGaN Heterojunction Dual-Band Detectors”, L. E. Byrum, G. Ariyawansa, R. C. Jayasinghe, N. Dietz, A. G. U. Perera, S. G. Matsik, I. T. Ferguson, A. Bezinger, and H. C. Liu, J. Appl. Phys. 106, 053701 (2009).
22. “Effect of Emitter Thickness on the Spectral Shape of HEterojunction Interfacial Workfunction Internal Photoemission Detectors”, S. G. Matsik , R. Jayasinghe, A. Weerasekara, A. G. U. Perera, E. Linfield , S. Khanna , M. Lachab , and H. Liu, Appl. Phys. Lett.  106, 014509 (2009).
23. “Normal incidence detection of ultraviolet, visible, and mid-infrared radiation in a single GaAs/AlGaAs device”, G. Ariyawansa, P. V. V. Jayaweera, A. G. U. Perera, S. G. Matsik, M. Buchanan, Z. R. Wasilewski, and H. C. Liu, Optics Lett. 34, 2036 (2009).
24. “Wavelength Agile Superlattice Quantum Dot Infrared Photodetector”, G. Ariyawansa, A. G. U. Perera, G. Huang, and P. Bhattacharya, Appl. Phys. Lett.  94, 131109 (2009). (Also selected for publication in Virtual Journal of Nanoscale Science & Technology, Vol. 19, Iss. 16 (April 20, 2009)).
25. “A quantum ring terahertz detector with resonant tunnel barriers”, G. Huang, W. Guo, P. Bhattacharya, G. Ariyawansa, and A. G. U. Perera, Appl. Phys. Lett. 94, 101115 (2009).

Profile Details

http://www.phy-astr.gsu.edu/perera/index.html