Ritesh Agarwal

Srinivasa Ramanujan Distinguished Scholar

Materials Science and Engineering
3231 Walnut Street
Philadelphia, PA 19104-6272

Office: LRSM 324
Phone: (215) 573-3037
Email: riteshag[at]seas.upenn.edu



Visiting Researchers

Do Hyun Kim

Phase change, strain engineering

Ph.D. Students

Yuhui Wang

Semiconductor Plasmonics


Harshvardhan Jog

Topological Materials


Yicong Chen

Topological Materials


Jia-Chen Shi

Topological Photonics


Utkarsh Khandelwal

Topological Materials


Shupeng Xu

Topological Photonics



(No title)

Mariam Georges (joint with Dan Gianola, MSE), expected May 2011.

Christopher Rodd

Nanowire-Conducting Polymer Hybrid Systems

May 2011

Brian Piccione

Light-Matter Coupling in Nanowire Optical Cavities


Carlos Aspetti

Nanowire plasmonics

May 2014

Pavan Nukala

Phase Change Nanowires: insitu microscopy analysis

May 2014


Rahul Agarwal

Chalcogenide nanowires, Phase change and thermoelectrics

May 2015

Joohee Park

Nanowire Optics

May 2015

Siddharth Ghosh

(Jointly with G. Piazza, ESE, Penn)

Nanowire Optomechanics

May 2014


Dr. Youngchul Leem




Dr. Minsoo Hwang




Dr. Wenjing Liu

Semiconductor Plasmonics




Sonya Kripke

Synthesis and Characterization of Te based nanostructures for thermoelectric applications


Karthik Kumar

Ultra-small phase change nanowires


Aaron Wirshba

Nanowire waveguides


Past Postdocs

  • Dr. Chang-Hee Cho (Semiconductor Nanophotonics and Plasmonics); Currently Assistant Professor at Daegu Gyeongbuk Institute of Science and Technology (DGIST), Department of Emerging Materials Science, Korea.
  • Dr. Hee-Suk Chung (Phase Change Materials, in-situ TEM); Currently senior engineer at Samsung Inc. electro-mechanics, Korea
  • Dr. Sung Wook Nam (Phase Change Materials, in-situ TEM); Currently Research Scientist at IBM.
  • Dr. Lambert van Vugt (Semiconductor Nanophotoincs)
  • Dr. Se-Ho Lee (Phase Change Nanowires); Currently Senior MTS, Hynix Semiconductor Inc, Korea
  • Dr. Bin Zhang (Cation Exchange Phenomena in II-VI Nanowires); Currently Assistant Professor of Chemistry, Tianjin University.
  • Dr. Huacheng Zhang (Nanowire Surface Engineering for Organic/Inorganic Devices)
  • Dr. Mukut Mitra (Drift in nanowire phase change memory) Currently at Applied Materials
  • Dr. Sajal Dhara (Investigating orbital interaction induced chirality in semiconducting nanostructures by optoelectronic probe); Currently Assistant Professor, IIT Kharagpur
  • Dr. Moon Hyung Jang (Phase Change Nanowire growth and Characterization); Currently Phil Parrish Fellow, University of Virginia
  • Dr. Ming-Liang Ren (Nonlinear optics in photonic and plasmonic systems); Currently at Mellon Bank
  • Dr. Liaoxin Sun (Strong light-matter coupling and strain effects in nanostructures); Currently Sr. Scientist, Shanghai Institute of Technical Physics

Past Ph.D. Students

  • Carlos O. Aspetti (Surface plasmon-based engineering of semiconductor nanowire optics): PhD Awarded Dec 2014. Management Consultant in Greater New York Metropolitan Area.
  • Chris Rodd (Light-Matter Coupling in Nanowire Optical Cavities): PhD Awarded May 2013. Patent Examiner at U.S. Patent Office.
  • Brian Piccione (Light-Matter Coupling in Nanowire Optical Cavities): PhD Awarded May 2013. Postdoctoral fellow at the University of Pennsylvania. Recipient of “Early Career Recognition Award” from Pennsylvania State University.
  • Yeonwoong Jung (Nanowire Phase Change Memory): PhD Awarded May 2009. Postdoctoral fellow at Yale University. Recipient of MRS-silver medal award, NBIC-Penn Student Research award, Stein Prize for best PhD Thesis.
  • Pavan Nukala (Currently Marie Curie Fellow, University of Groningen)
  • Joohee Park (Currently at Intel)
  • Rahul Agarwal (Currently at Intel-Micron)
  • Jacob Berger (Currently at Lam Research)
  • Daksh Agarwal (Currently at Applied Materials)
  • Wenjing Liu (Currently Postdoctoral researcher at the University of Pennsylvania)
  • Gerui Liu (Currently at ASML)
  • Zhurun Ji (Currently at Stanford University)

Past Masters Students

  • Haofeng Li (Polymer/Semiconductor hybrid solar cells): May 2011. Currently Ph.D. student at Dartmouth College, Thayer School of Engineering.
  • Dong-Kyon Ko (Growth of Phase Change Nanowires): Dec 2006. Currently Ph.D. student at Penn Chemistry.
  • Yu-Han Cheng (Controlled Growth of High-Density Nanowires): May 2007. Currently Ph.D. student at  UCSD.
  • Tyler Zimmerman (Nanowire Solar Cells): May 2008. Currently at Boeing Corporation.
  • Chung-Ying Yang (Recrystallization Mechanism in Phase Change Nanowires): May 2009. Currently at Taiwan Semiconductors.
  • Chien-An Chen (Growth Dominant Recrystallization in Phase Change Nanowires): May 2009

Past Undergraduates

  • Karthik Kumar (Ultra-small phase change nanowire, characterization and growth)
  • Aaron Wishba (Nanowire waveguides)
  • Rahil Mehrotra (Radiation effects on phase change nanowire devices)
  • Thomas Walsh (Radiation effects on phase change nanowire devices)
  • Shoham Bhadra (Nanowire spectrometer)
  • Eric Mills (Nanowire spectrometer)
  • Arthur Spector (Nanowire waveguide dispersion)
  • Mariam Georges (Bio inspired photovltaics)
  • Justin Chung (Coupled nanowire LED-detector systems)
  • Andrew Jennings (Size-Controlled growth of Phase Change Nanowires with Novel Catalysts)
  • Alex Sztein (Waveguiding in Nanowires with Controlled Defects)
  • Johanna Engel (Diameter Control of Phase Change Nanowires)
  • Jennifer Ehrich (Memory Switching in Nanowires)