Rachel S. Goldman



2094 H.H. Dow Building

T: (734) 647-6821




Research Facilities


Research Group

Group News:

See our GaAsNBi "Magic" Alloy work in the news:

"Magic" alloy could spur the next generation of solar cells: https://news.engin.umich.edu/2017/06/magic-alloy-could-spur-the-next-generation-of-solar-cells/

US lawmakers get an earful about materials research—and now they want more: https://www.cambridge.org/core/journals/mrs-bulletin/news/us-lawmakers-get-an-earful-about-materials-research-and-now-they-want-more

See our Plasmonic Nanocomposites work in the news:

Nanoparticles could spur better LEDs, invisibility cloaks: http://ns.umich.edu/new/releases/24969-nanoparticles-could-spur-better-leds-invisibility-cloaks

Plasmonic Nanoparticles Boost Light Emission: http://nanotechweb.org/cws/article/tech/69697

Invisibility cloak breakthrough brings Harry Potter magic closer to reality:http://www.business-standard.com/article/news-ani/invisibility-cloak-breakthrough-brings-harry-potter-magic-closer-to-reality-117072000425_1.html

Graduate Students
Brandon Carter
Email: bacart@umich.edu

Brandon Carter received his B.S. degree in Physics from the University of Houston, Spring 2017 semester. He is currently a PhD. pre candidate in the Materials Science and Engineering department at the University of Michigan. His research interests involve the growth and characterization of III-V semiconductors via Molecular Beam Epitaxy, and the alloying effects of Bismuth and Nitrogen in  GaAsNBi.

Davide Del Gaudio
Email: ddelgaud@umich.edu

Davide Del Gaudio received his B.Sc. and M.Sc. degrees in Physics from University of Rome "Tor Vergata", in Italy. He is a Ph.D. candidate in MSE at University of Michigan, advised by Prof. Rachel S. Goldman. His research involves the growth and characterization of semiconductor quantum dots for intermediate band solar cells and pulsed-laser deposition of mixed oxide nanowires for thermoelectrics.

Christian Greenhill
Email: cmgreen@umich.edu

Chris Greenhill received her B.S. degree in Physics and Math from the University of Memphis in 2014 and is currently a PhD candidate in MSE, working in the Goldman group.  In 2016, she received a National Science Foundation graduate research fellowship for her project entitled, "Influence of Strain and Composition on Band Alignment of Semiconductor Heterostructures".  During the Winter 2017, Chris was a Sweetland Junior Fellow in the College of LSA.  

Timothy Jen
Email: timyjen@umich.edu

Tim Jen received his B.A. degree in Physics from University of California: Berkeley in 2011.  He focuses on understanding solute incorporation in GaAsN and GaAsNBi semiconductor alloys using a combined computational-experimental approach. In 2015, he received a DOE Basic Energy Science Graduate Student Research Fellowship to spend the 2015-2016 academic year at Los Alamos National Laboratory in New Mexico, to work with Dr. Yong Wang on channeling ion beam studies of GaAsN and GaAsNBi alloys.  He will begin a position at Intel in Portland, Oregon soon.

Hongling Lu
Email: hlingl@umich.edu
Jordan Occena
Email: joccena@umich.edu

Jordan Occena received his B.S. degree in Engineering Physics from the University of Tulsa in 2013.  He is a Ph.D. candidate in MSE at the University of Michigan, advised by Prof. Rachel Goldman.  His research focuses on growth and characterization of GaAsNBi films and heterostructures.  He recently received a DOE Basic Energy Science Graduate Student Research Fellowship to spend the year at the National Renewable Energy Research Laboratory in Golden, Colorado, examining atomic ordering and phase separation in his GaAsNBi films.

Undergraduate Students
James Delaney
Email: deljm@umich.edu
Ethan Lu
Email: eelu@umich.edu

Ethan Lu is an undergraduate electrical engineering student who joined the Goldman Group in Winter 2017. He is currently investigating the formation and plasmonic properties of indium nanoparticles on silicon substrates using a combined computation-experimental approach.

Anri Sorel
Email: soranri@umich.edu
Julia Trombley
Email: juliatr@umich.edu

Prof. Matthew Beck

Ilya Beskin
Email: beskini@umich.edu

Ilya is an undergraduate physics major, who joined UM and the Goldman Group in Fall 2012.  He assisted Dr. Myungkoo Kang with investigations of nanodroplet formation and motion during focused-ion-beam irradiation of semiconductor surfaces. under irradiation by focused-ion-beam irradiation.

Dr. Justin Canniff
Email: canniff@umich.edu

Justin received his B.S. degree in MSE from UIUC in 2007 and his PhD from UM in 2014, with a thesis entitled, "Formation and Properties of Ion-Induced Nanoparticles in SiNx ".  As a research fellow at UM, he explored the nanoscale origins of ion-induced fractal formation in SiNx.  He also worked toward the development novel pump-probe approaches aimed at understanding the preferential scattering of acoustic phonons by the fractals.  Dr. Canniff has been employed at Lam Research since 2014.

Dr. Alexander Chang
Email: asjang@umich.edu

Alexander S. Chang received his B.S. degree in Engineering Physics from Cornell University in 2011.  He received his PhD with the Goldman group, for his thesis, entitled, "Nanoscale Studies of Energy Band Gaps and Band Offsets in Compound Semiconductor Heterostructures"

Dr. Rachel Collino
Email: rrcollino@gmail.com

Rachel received her BSE and PhD degrees in mechanical engineering from University of Michigan in 2003 and 2010, respectively. Rachel was co-advised by Professor Thouless in ME, leading to her thesis entitled, "BLISTER FORMATION AND LAYER TRANSFER OF N-IMPLANTED GaAs".  Rachel is currently a Research Fellow with Prof. M. Begley at UC-Santa Barbara.

Dr. Vaishno Dasika
Email: vdasika@austin.utexas.edu

Vaishno received her BSE and PhD degrees in electrical engineering from UM in December 2002 and 2009, respectively. Vaishno's thesis was entitled, "Nanometer-Scale Structural and Electronic Properties of Low Dimensional Heterostructures".  Vaishno spent a few years as a Research Fellow with Profs. Ed Yu and Seth Bank at UT-Austin, and is currently employed at Texas Instruments.

Dr. Richard L. Field III
Email: fieldr@umich.edu

Richard L. Field III received his B.S. degree in Physics and B.A. degree in Music Performance (Piano) from Denison University in 2009.  Richard was co-advised by Dr. Rachel Goldman and Dr. Cagliyan Kurdak.  He received his PhD in 2016, with a thesis entitled, "Growth and Electronic Properties of GaAsN and GaAsBi Alloys".  Dr. Field III is currently employed by Nanoflex in Ann Arbor, MI.

Dr. Chad Gallinat

Jeff Gleason
Email: jeffrey_gleason@apple.com

Jeff graduated from RPI in 2001 and worked at Micron Semiconductor in Idaho prior to joining UM as a M.S. student in 2002.  In the Goldman Group, Jeff studied point defects in GaMnAs and related alloys, using cross-sectional STM. He defended his Master's thesis and received PhD candidacy in September 2004.  He has worked at Micron Semiconductor in Idaho and Intel in Oregon.  He currently heads the iPhone Camera Design team at Apple in California.

Mike Hjelmstad
Email: mhjelm@engin.umich.edu

Mike received his B.S.E. degree in MSE from UM in 2000. Mike worked in industry for 2 years before returning to Michigan for graduate school. His graduate research in the Goldman group was related to spintronic structures and their characterization with cross-sectional STM. Mike completed his M.S.E. degree in May 2004. He is currently a Customer Support Engineer at Oxford Instruments, serving the Northwest U.S.

Dr. Simon Huang
Email: yenfu@umich.edu

Simon Huang received his B.S. degree in MSE from UC Berkeley. His thesis research involved the growth and characterization of semiconductor quantum dots for intermediate band solar cells. Specifically, he has studied the influence of wetting layers and quantum dot size distribution on intermediate band formation in InAs/GaAs superlattices. In addition, he has investigated the influence of substrate temperature, indium exposure, and buffer surface reconstruction on droplet epitaxy of InAs/GaAs quantum dots.  Simon received his PhD in 2015 for his thesis entitled, "Formation, Structure, and Properties of InAs/GaAs Quantum Dots".  He is currently employed at Applied Materials.

Dr. Sunyeol Jeon
Email: syjeon@umich.edu

Sunyeol received his B.S. and M.S. degrees from Hanyang University in Korea and joined UM as a graduate student in 2011.  He received his Ph.D in 2016 with a thesis entitled, "Gallium Metal Nanoparticles for Plasmonics and Droplet Epitaxy: Formation and Properties".  He is currently working at Samsung in Korea.

Dr. Yu Jin
Email: jinyu08@gmail.com

Yu Jin received her BS and PhD degrees in physics from Fudan University (2004) and University of Michigan (2010), respectively.  Dr. Jin's PhD thesis, co-advised by Professors Goldman and Kurdak, was entitled, "INFLUENCE OF N INCORPORATION ON THE ELECTRONIC PROPERTIES OF DILUTE NITRIDE (IN)GaAsN ALLOYS".    Dr. Jin was initially employed at Imra America in Ann Arbor; she is presently a Process Engineer at Applied Materials in Santa Clara, CA.

Dr. Myungkoo Kang
Email: myungkoo@umich.edu

Myungkoo Kang received his BS and MS degrees in MSE from Seoul National University, and his PhD in MSE from the University of Michigan. His thesis research involved a combined experimental-computation study of focused ion beam-induced novel plasmonic nanoparticles on compound semiconductor surfaces. As a post-doctoral research fellow at the University of Michigan, he developed a novel process combining focused ion beam and biochemical characterization with an aim to gain further insight into the ion irradiation-controlled modification of DNA arrays for DNA arrays-based dark matter detectors. He continued his academic career as a post-doctoral research fellow at Pennsylvania State University where he demonstrated a new laser exposure-based process for gradient refractive index fabrication using multicomponent Ge-As-Se-Pb systems that provides an opportunity for next generation mid-wavelength infrared lenses. He is currently a research associate at the University of Central Florida where his research interests include developing conformally-coated chalcogenide films on flexible substrates and their optical switching behavior upon phase change.

Dr. Alex Lin

Dr. Yen-Hsiang Lin
Email: linyen@umich.edu

Dr. Yen-Hsiang Lin received his B.S. degree in Physics from National Taiwan University and his Ph.D. degree in Physics from University of Minnesota. As a research fellow in Professor R.S. Goldman’s group, his research involved characterizing various types of semiconductor materials by using scanning tunneling microscope (STM), scanning tunneling spectroscopy (STS), and scanning thermoelectric microscope (SThEM).  He is currently a research fellow at the University of Maryland.

Dr. Bogdan Lita
Email: optoengineer@gmail.com

Bogdan received his PhD in MSE at U-M in January 2002, with a thesis entitled, "Nanometer-scale Studies of Interdiffusion and Segregation in Semiconductor Structures". Bogdan was initially employed at the Optoelectronics Center of Agere Systems (Lucent Technologies), in Breinigsville, PA. He was also a National Research Council Postdoctoral Fellow in the Optoelectronics Division of the National Institute of Standards and Technology in Boulder, Colorado. He has worked as an Engineer at Zettacore Inc., as a Manager at Primestar Solar, and as a Manager at GE Power and Water.  He is currently a Technology Consultant in Boulder, Colorado.

Dr. Hugh McKay
Email: hmckay@imra.com

Hugh received his BS and MS degrees in physics from Dalhousie University in Halifax Nova Scotia. He began his Ph. D. in physics at Carnegie Mellon University in August of 1998. His thesis, "Nanoscale Microscopy of Semiconductor Epitaxy" was defended in July of 2003 Hugh was a post-doctoral fellow in the Goldman group from 2003 to 2005 and joined IMRA America in 2007

Dr. Matt Reason
Email: matthew.reason@lmco.com

Matt received his B.A. in Physics from Hendrix College in 2001, and received his PhD in February 2006, with a thesis entitled, "Structure and Properties of Dilute Nitride GaAsN Alloys Films". He spent three years as a post doctoral research fellow in the Naval Research Laboratory in Washington DC prior to joining Lockheed Martin as a Research Engineer.  He is currently an R&D Engineering Manager at Lockheed Martin in Goleta, California.

Prof. Byungha Shin
Email: byungha@kaist.ac.kr

Byungha received his BSE in MSE from Seoul National University in 2000, and his M.S. from the University of Michigan in July 2002. His Master's Paper was entitled, "Nanometer-scale Studies of Phase Separation and Clustering in Compound Semiconductor Alloys". He then moved to Harvard University and obtained his PhD in Applied Physics in Jan 2007. From May 2007 to March 2010, he was a post-doc in the department of MSE at Stanford University. From May 2010 to Feb 2013, he worked at IBM T. J. Watson Research Center as s post-doctoral research and a Research Staff Member. He is currently an Assistant Professor in the department of Materials Science and Engineering at Korea Advanced Institute of Science and Technology (KAIST) in Daejeon, Korea.

Dr. Gülin Vardar
Email: gvardar@umich.edu

Gulin received her B.S. degrees in Mechanical Engineering and Physics from Bogazici University in 2010. In 2013, she received her M.S. degree in MSE from University of Michigan. She received her PhD candidacy in August 2012. Her M.S. research involved growth and characterization of GaAsBi alloys. Her PhD research involved studies of novel battery materials (with Prof. Don Siegel).  She is currently a Research Fellow at MIT.

Dr. Jenna Walrath
Email: jwalrath@umich.edu

Jenna Walrath received her B.S. degree in Physics from Purdue University in 2011.  Jenna's PhD research focused on characterizing thermoelectric semiconductor materials using Scanning Tunneling Microscopy and Spectroscopy (STM/S) and Scanning Thermoelectric Microscopy (SThEM).  Jenna was awarded an NSF Graduate Fellowship in 2013.  She received her PhD in 2016 with a thesis entitled, "Probing the band structure and local electronic properties of low-dimensional semiconductor structures".  She is currently employed at Intel in Oregon.

Dr. Michael Warren
Email: mvwarren@umich.edu

Michael Warren received his B.S.E. and Ph.D. degrees in MSE from UM in 2007 and 2014, respectively.  His thesis research involved investigations of embedded metal/semiconductor nanocomposites for high efficiency thermoelectrics. He utilized In or Bi ion implantation into GaAs followed by annealing to nucleate metallic nanocrystals. He characterizes the structure of these films using cross-sectional transmission electron microscopy. Collaborating with the Uher Group in physics, he measured the Seebeck coefficient and electrical conductivity.  Mike is currently a Research Fellow at the Naval Research Laboratories.

Dr. Xiaojun Weng
Email: xiaojunweng@yahoo.com

Xiaojun received both his BS and MS in Materials Science from Shanghai Jiao Tong University, became a PhD candidate at U-M in July 2000, and defended his PhD thesis, entitled, "Structural, Electronic, and Optical Properties of Narrow Gap Compound Semiconductors" in December 2002. As a research fellow at UM, he worked jointly with the Goldman and Kieffer groups on an NSF project entitled, "Role of Elastic Anisotropy in Semiconductor Nanopatterning". He joined the Pennsylvania State University, University Park in Feb. 2005, first as a Postdoc Researcher and then a Research Associate with the Materials Research Institute. He is currently a TEM Engineer at Intel Corporation in Hillsboro, Oregon.

Dr. Adam Wood
Email: Awood4@wisc.edu

Adam received his BS degree in physics from Oklahoma State University in 2004.  In 2012, he received his PhD in physics from UM, with a thesis entitled, "Formation of Embedded Nitride Semiconductor Nanocrystals".  He is currently a Research Fellow at the University of Wisconsin-Madison.

Dr. Jia-Hung Wu
Email: wujiahung@gmail.com

Jia-Hung received his B.S. and M.S. degrees in MSE from National Chiao Tung University in 2001 and 2003, and his PhD degree in MSE from University of Michigan in 2013, with a thesis entitled, "Surface Patterned growth of Semiconducting and Metallic Nanostructures."  He is currently a Research Scientist at Bluestone Global Technologies in Yorktown Heights, New York.

Weifeng Ye

Weifeng Ye received his B.S. degree in MSE from Shanghai Jiaotong University in 2001, and his M.S. degree and PhD candidacy in MSE from UM in 2004. He has worked as a Process Engineer at Applied Materials since 2008.

Eric Zech
Email: ericzech06@gmail.com

Eric Zech received his BS degrees in ChemE from UM in 2011 and his M.S. degree and PhD candidacy in MSE from UM in 2013. His M.S. research involved characterization of inorganic semiconductor nanostructures using a combination of scanning tunneling microscopy, scanning tunneling spectroscopy, and atom probe tomography.  He currently works at Google in Mountain View, California.