
GROUP

About the Team

Siddha Pimputkar
Assistant Professor, (he/him)
Department of Materials Science and Engineering
P.C. Rossin Assistant Professorship
Center for Photonics and Nanoelectronics (CPN)
P.C. Rossin College of Engineering and Applied Science
Lehigh University
Coordinates
Whitaker Hall 456
Sinclair 205B
Sinclair 305
Contact
Phone: +1 (610) 758 4231
Fax: +1 (610) 758 4244
Email: siddha at lehigh edu
Education
- Post-Doctoral Fellow, University of California, Santa Barbara, U.S.A. (2012–2016)
- Ph.D. in Materials, University of California, Santa Barbara, U.S.A. (2012)
- B.S. in Mechanical Engineering, Illinois Institute of Technology, U.S.A. (2006)
Appointments
- P.C. Rossin Assistant Professorship, Lehigh (2019–2021)
- Assistant Professor, Lehigh University, Dept. of Materials Science and Engineering (2016–present)
Honors and Awards
- Young Scientist Award, American Association for Crystal Growth (AACG) (2021)
“The AACG Young Scientist Award is given to an early career scientist working in the fields of crystal growth research, development, practice, theory, modeling, characterization, application or production to recognize his or her outstanding scientific and technical contributions in the field of Crystal Growth. The criteria for selection shall be scientific excellence, clarity of presentation and impact on the field of crystal growth.” - Lehigh Early Career Award for Distinguished Teaching, Lehigh (2021)
“Lehigh University sponsors this award to be given to a member or members of the teaching staff for distinguished teaching performed during the academic year.” - NSF CAREER Award (Ceramics) (2021)
- P.C. Rossin Assistant Professorship, Lehigh (2019–2021):
“Awarded to the most outstanding junior faculty in the P.C. Rossin College of Engineering and Applied Science who demonstrate high potential for establishing a successful academic career at Lehigh through the integration of teaching and research.” - Outstanding Researcher — Scientific Achievement Award, SSLEEC/UCSB (2015)
- Outstanding Graduate Student — Scientific Achievement Award, SSLEEC/UCSB (2011)
- National Science Foundation (NSF) Graduate Research Fellow (2007–2011)
- Department of Homeland Security (DHS) Graduate Research Fellow (2006–2008)
Competitive Funding (Awarded)
- NSF CAREER: Nitride Synthesis via Controlled Decomposition of Precursors under Moderate Pressure (2021)
- NSF: Ammonothermal cubic boron nitride single crystal growth near ambient pressure and temperature (2018)
- NSF MRI: Development of a High Pressure Spatial CVD for Functional Materials (2017)
- NSF Workshop: 10th International Workshop on Bulk Nitride Semiconductors (IWBNS-X) (2017)
Sessions, Workshops, and Conferences Organized
Leadership Positions:
- Program Co-Chair: American Conference on Crystal Growth and Epitaxy (ACCGE-23) (2023)
- Workshop Chair: International Workshop on Bulk Nitride Semiconductors (IWBNS-XI) (2022)
- Symposium Chair: Boron Nitride Epitaxial Growth & Characterization (ACCGE-22/OMVPE-20) (2021)
- Workshop Co-Chair: International Workshop on Bulk Nitride Semiconductors (IWBNS-X) (2017)
- Organizer: 1st Ammonothermal Crystal Growth Summer School, Santa Barbara, CA, U.S.A. (2016)
Committee Contributions:
- Technical Program Committee Member:
- International Conference on Nitride Semiconductors (ICNS) (2023)
- International Workshop on Physics of Semiconductor Devices (IWPSD) (Crystal Growth & Epitaxy Symposium) (2021)
- SPIE Optics and Photonics (Wide Bandgap Session) (2018, 2019)
- IEEE Photonics Conference (IPC): Displays and Lighting (DISL) (2018, 2019, 2020, 2021)
- International Workshop on Nitrides (IWN) (2016)
Professional Service
- Elected Executive Committee Member: American Association for Crystal Growth (AACG) (2021–2025)
- Co-editor Special Issue Proceedings of the 10th International Workshop on Bulk Nitride Semiconductors (Journal of Crystal Growth)
- Journal Reviewer: Applied Physics Letters, Ceramica, Chemical Engineering Communications, Chemistry – A European Journal, Chemistry of Materials, Crystals, Inorganic Chemistry, Inorganics, Journal of Applied Physics, Journal of Crystal Growth, Journal of Physical Chemistry, Nuclear Science and Techniques, Optics Express, Physica Status Solidi B, Progress in Crystal Growth and Characterization of Materials, Scientific Reports
Teaching
Our Commitment to
Diversity, Equity, Inclusion, and Excellence

Research is a creative process that is substantially enhanced by valuing, encouraging, and experiencing a vibrant, diverse group of individuals who support each other. We value and foster an inclusive environment by actively incorporating an open, supportive mindset while cultivating a culturally rich and diverse group dynamic.
At Lehigh, we are actively involved in the department and student-led initiatives to listen and grow further to become a more diverse, equitable, and inclusive community. We strive to overcome barriers together that are presented to first-generation students and students coming from disadvantaged backgrounds. The strength of our group is mirrored in the individuals’ success and our collective, communal effort to support everyone to become the best version of themselves on an academic and a personal level so everyone can grow to become respected and admired leaders.
Graduate Students

Florian Metzger
Ph.D. Student, (he/him)
Education:
- B. Sc. Chemical and Biological Engineering (2015), FAU Erlangen-Nurnberg (Germany)
- M. Sc. Chemical and Biological Engineering (2017), FAU Erlangen-Nurnberg (Germany)
Research Interests:
- Semiconductor materials (nitrides)
- Crystal growth
- Self-assembling of nanomaterials
- 3D-printing
Fun things in life: Hiking, biking, traveling and let’s not forget the cake baking!
Team member: 2017—Present

Jacob Dooley
Ph.D. Student, (he/him, they/them)
Education:
- B.S. Materials Engineering (2019), Lehigh University (USA)
Research Interests:
- Electronic Materials
- Crystal Growth
Team member: 2019—Present

Jonathan Valenzuela
Ph.D. Student, (he/him)
Education:
- M.S. Materials Science and Engineering (2021), Norfolk State University (USA)
- B.S. Materials Science and Engineering (2017), University of Virginia (USA)
Research Interests:
- Electronic Materials
- Crystal Growth
Team member: 2021—Present
Undergraduate Students

Tri Nguyen
Undergraduate Student
Education:
- B.S. Materials Science and Engineering (2021 exp.), Lehigh University (USA)
Research Interests:
- Electronic Materials
- Advanced Materials
- Materials Characterization
- Single Crystal Growth
An interesting fact about myself: I won the National Chess Champions Trophy 2015 in New Zealand.
Team member: 2018—Present

Julio Martinez-Cuin
Undergraduate Student
Education:
- B.S. Electrical Engineering (2021 exp.), Lehigh University (USA)
Research Interests:
- Circuits
- Programming
Team member: 2019—Present
Research Fellows
Alumni

Saskia Schimmel
Post-Doctoral Student
Education:
- B.Sc. Materials Science and Engineering (2010), FAU Erlangen-Nürnberg (Germany)
- M.Sc. Materials Science and Engineering (2012), FAU Erlangen-Nürnberg (Germany)
- Ph.D. Engineering (2018), FAU Erlangen-Nürnberg (Germany)
Research Interests:
- Wide bandgap semiconductors
- Crystal growth at high T / high P
- PVT and ammonothermal growth
- Development of X-ray based in situ monitoring methods for ammonothermal processes
Team member: 2018—2019
Moved on to: Post-doc in Amano’s Lab at Nagoya University

Pedram Yousefian
Ph.D. Student
Education:
- B. Sc. Materials Engineering (2014), Isfahan University of Technology (Iran)
- M. Sc. Mechanical Engineering (2017), University of North Florida (USA)
- M.S. Materials Science and Engineering (2020), Lehigh (USA)
Research Interests:
- Electronic & Magnetic Materials
- Solidification and Crystal Growth
- Materials Processing & Additive Manufacturing
Team member: 2017—2020
Moved on to: Ph.D. at Penn State

Chris Mascetti
Master’s Student
Education:
- B.S. Materials Science and Engineering (2018), Lehigh University (USA)
- M.Eng. Materials Science and Engineering (2019), Lehigh University (USA)
Research Interests:
- Electronic Materials
- Bulk growth of GaN
Fun things in life: Cross country running
Team member: 2017—2019

Vincent Rienzi
Master’s Student
Education:
- M.Eng. Materials Science and Engineering (2019), Lehigh University (USA)
- B.S. Materials Science and Engineering (2018), Lehigh University (USA)
Research Interests:
- Electronic Materials
- Optoelectronic devices
- Thin film growth
- Ammonothermal growth
Fun things life: Frisbee!!
Team member: 2017—2019
Moved on to: Grad Life at UCSB

Bryan Caruso
Master’s Student
Education:
- M.Eng. Materials Science and Engineering (2020 exp.), Lehigh University (USA)
- B.S. Materials Science and Engineering (2019), Lehigh University (USA)
Research Interests:
- Engineering
Team member: 2019

Kristine Phan
Undergraduate Student
Education:
- B.S. Electrical Engineering (2021 exp.), Lehigh University (USA)
Team member: 2020

Eddie Jeffs
Undergraduate Student
Education:
- B.E. Computer Engineering and Cognitive Science (2021 exp.), Lehigh University (USA)
Team member: 2020

Sebastian Galdamez
Undergraduate Student
Education:
- B.S. Electrical Engineering (2021 exp.), Lehigh University (USA)
Research Interests:
- Circuits
- Programming
Team member: 2019—Present

Evan Willmarth
Undergraduate Student
Education:
- B.S. Mechanical Engineering (2021 exp.), Lehigh University (USA)
Research Interests:
- Mechanical Systems
- CFD Modeling
- ANSYS
Team member: 2017—Present

Quot Al Nabhani
Undergraduate Student
Education:
- B.S. Materials Science and Engineering (2020 exp.), Lehigh University (USA)
Team member: 2018—Present

Jillian Cowles
Undergraduate Student
Education:
- B.S. Materials Science and Engineering (2020 exp.), Lehigh University (USA)
- Minor in Music
Team member: 2018—Present

Derek Hu
Undergraduate Student
Education:
- B.S. Materials Science and Engineering (2019), Lehigh University (USA)
- Minor in Philosophy
Team member: 2018—2019

Molly Hwang
Undergraduate Student
Education:
- B.S. Materials Science and Engineering (2019), Lehigh University (USA)
- Minor in Mechanics of Materials
- Nanotechnology
Team member: 2018—2019