---

Classes Taught

• ENGR 520 Semiconductor Quantum Electronics (Taught under Commonwealth Graduate Engineering Program and available to Virginia public universities)
• EGRE 621 Introduction to Spintronics (Taught under Commonwealth Graduate Engineering Program and available to Virginia public universities)

Current Research Projects

• Computing with self assembled quantum dots and nanowires. Supported by a National Science Foundation NIRT award.
• Single spin logic and matrix element engineering. Supported by a National Science Foundation EMT award
• Self assembled rare earth sulfide nanowire for field emitters. Supported by a National Science Foundation GOALI award

Research Topics

• Self assembly of regimented nanostructure arrays
• Spintronics
• Quantum devices
• Hot carrier transport in nanostructures
• Nanoelectronics
• Quantum computing

Selected Recent Publications

• Introduction to Spintronics (textbook co-authored with Marc Cahay). CRC Press, Boca Raton, 2008
• S. Bandyopadhyay, “Power dissipation in spintronic devices: A general perspective'', J. Nanosci. Nanotech., 7, 168 (2007).
• S. Pramanik, C-G Stefanita, S. Bandyopadhyay, N. Harth, K. Garre and M. Cahay, “Observation of extremely long spin relaxation time in an organic nanowire spin valve”, Nature Nanotechnology, 2, 216 (2007).
• M. Cahay, K. Garre, J. W. Fraser, D. J. Lockwood, V. Semet, V. T. Binh, S. Bandyopadhyay, S. Pramanik, B. Kanchibotla, S. Fairchild and L. Grazulis, “Characterization and field emission properties of lanthanum monosulfide nanoprotrusion arrays obtained by pulsed laser deposition on self assembled nanoporous alumina templates”, J. Vac. Sci. Technol. B, 25, 594 (2007).
• T. Basu, S. Sarkar and S. Bandyopadhyay, “Design of a single spin arithmetic logic unit”, IET Circuits, Devices and Systems: Special Isssue on Quantum Dots, 1, 194 (2007).
• J. Wan, M. Cahay and S. Bandyopadhyay, “A digital switch and femto-Tesla magnetic field sensor based on Fano resonance in a spin field effect transistor”, J. Appl. Phys., 102, 034301 (2007).
• S. Pramanik, S. Bandyopadhyay and M. Cahay, “Energy dispersion relations of spin split subbands and gate control of spin polarization in a quantum wire”, Phys. Rev. B., 76, 155325 (2007).
• J. Wan, M. Cahay and S. Bandyopadhyay, “Spin Injection Efficiency at the Source/Channel Interface of Spin Transistors”, IEEE Trans. Nanotech. , 7, 34 (2008).
• H. Agarwal, S. Pramanik and S. Bandyopadhyay, “Single spin universal Boolean logic gate”, New Journal of Physics (Focus Issue on Spin in Reduced Dimensions), 10, 015001 (2008).
• P. Upadhayay, S. Pramanik, S. Bandyopadhyay and M. Cahay, “Magnetic field control of spin texturing in semiconductor quantum wires with Rashba spin orbit interaction”, Phys. Rev. B, 77, 045306 (2008).
• S. Bandyopadhyay, “Single spin logic: Perpetuating Moore’s law”, Nanotechnology Perceptions, March 2008 (Invited by the editor Graham Holt).
• J. Wan, M. Cahay and S. Bandyopadhyay, “A dual gate Spin Field Effect Transistor with low switching voltage and large conductance ON to OFF ratio”, Physica E, 40, 2659 (2008).
• A. Trivedi, S. Bandyopadhyay and M. Cahay, “Dependence of the conductance ON/OFF ratio and transconductance of a Spin Field Effect Transistor on the spin injection efficiency”, IET Circuits, Devices and Systems, 1, 395 (2008).
• R. Katkar, S. Ramanathan, S. Bandyopadhyay and G. B. Tait, “Wire size dependent optical activity in electrochemically self assembled II-VI semiconductor nanowire arrays”, Physica E, 40, 556 (2008).
• S. Ramanathan, S. Patibandla, S. Bandyopadhyay, J. D. Edwards and J. Anderson, “Fluorescence spectroscopy of ZnSe and Mn-Doped ZnSe Nanowires”, Nanotechnology, 19, 195601 (2008).
• P. Upadhyay, S. Pramanik and S. Bandyopadhyay, “Optical transitions in a quantum wire with spin-orbit interaction and its applications in terahertz electronics: Beyond zeroth order theory”, Phys. Rev. B, 77, 155439 (2008).
• M. Cahay, K. Garre, J. W. Fraser, D. J. Lockwood, V. Semet, B-T Binh,B. Kanchibotla, S. Bandyopadhyay, L. Grazulis and B. Das, “Field emission properties of metallic nanostructures self assembled on nanoporous alumina and silicon templates”, J. Vac. Sci. Technol. B., 26, 885 (2008).
• V. Semet, V. T. Binh, M. Cahay, K. Garre, J. W. Fraser, D. J. Lockwood, S. Pramanik, B. Kanchibotla, S. Bandyopadhyay, S. Fairchild and L. Grazhulis, “Field emission from self assembled lanthanum monosulfide nanodomes”, J. Nanomat. Article ID: 682920 (2008) (INVITED).
• S. Bandyopadhyay, “Magnetoresistance oscillations of a quantum wire spin-valve: A novel method to estimate carrier drift velocity or mobility”, Physica E, 40, 2814 (2008)).
• A. Trivedi and S. Bandyopadhyay, “A spintronic Toffoli-Fredkin gate”, J. Appl. Phys., 103, 104311 (2008).
• S. Pramanik, S. Bandyopadhyay and M. Cahay, “The inequality of charge and spin diffusion coefficients”, J. Appl. Phys., 104, 014304 (2008).
• B. Kanchibotla, S. Pramanik, S. Bandyopadhyay and M. Cahay, “Transverse Spin Relaxation Time and Spin Decoherence in Alq3 Molecules”, Phys. Rev. B, 78, 193306 (2008).
• D. Bhowmik and S. Bandyopadhyay, “Gate contol of the spin splitting in an aysmmetric quantum dot using the Rashba effect”, Physica E, 41, 587 (2009).
• S. Bandyopadhyay and M. Cahay, “Spin Field Effect Transistors”, in Handbook of Nanoscience Engineering and Technology, Eds. William A. Goddard, III, Donald W. Brenner, Sergey E. Lyshevski and Gerlad J. Iafrate, Chapter 8 (Taylor and Francis, New York, 2007).
• C. G. Stefanita, F. Yun, M. Namkung, H. Morkoc and S. Bandyopadhyay, “Many Faces of Nanotechnology: A Brief Review of Some Routes to Nanosynthesis and Applications”, in Handbook of Electrochemical Nanotechnology, Eds. Yuehu Lin and Hari Singh Nalwa, Chapter 1, (American Scientific Publishers, Stevenson Ranch, CA, 2007).
• B. Kanchibotla, S. Pramanik and S. Bandyopadhyay, “Self Assembly of Nanostructures Using Nanoporous Alumina Templates”, in Handbook of Nano and Molecular Electronics, Ed. E. Lyshevski, (CRC Press, 2007), Chapter 9.
• S. Bandyopadhyay, “Hybrid and monolithic spintronics”, in Information Technology, Vol. II, Ed. R. Waser, (Wiley-VCH, Germany, 2008).