semiconductor researcher

Zhuting SUN

Cincinnati OH 513-***-**** **********@*****.*** https://www.linkedin.com/in/sunzg SEMICONDUCTOR ELECTRICAL RESEARCHER

Objective: Seek a position where I can apply my skills in design, simulation, analytical calculation, device fabrication, metrology, electronics, cryogenic, and software to benefit the research and development of products for your company.

Research in III-V semiconductor device physics

Model, design, simulation, fabrication and

characterization for nanowire-based electronic

devices: FET & Schottky-diodes

Calculation for semiconductor basic physics at

bulk and nanoscales (mobility, carrier density)

Calculation for single nanowire-based transistor physics (gate capacitance, depletion, potential

barrier, charge distribution)

Low level electrical characterization: utilizing lock-in amplification; small signal detection

Electromagnetic systems simulation via Ansoft

HFSS: coplanar waveguide/cavity resonator

Microwave circuitry characterization: coaxial or planar geometries (Vector Network Analysis)

Micro/Nano device fabrication: photomask

design, lithography, etching, thin film

deposition, wire bond

Surface metrology and thickness measurement:

ellipsometry, profilometer

Measurement and analysis codes written and

debugged using Igor Pro, a C based language

TECHNICAL PROFICIENCY

SOFTWARE: AutoCAD • HFSS • Mathematica •

Excel • IGOR • C++ • Latex

ELECTRONICS: SMU • Functional Generator •

Current/Voltage Amplifier • DMM • BNC

MICROWAVE: VNA • Lock-in • Resonator

LITHOGRAPHY: Mask Aligner • Etching • lift-off

• Nanoimprint • E-beam • deposition

METROLOGY: Profilometry • Ellipsometry

CRYOGENICS: Cryostat (4HE flow) • Dilution

Refrigerator (3HE/4HE Condensation)

PROFESSIONAL EXPERIENCE

RESEARCH ASSISTANT, Nano Materials Physics Group, University of Cincinnati, Cincinnati, OH 2010–Present Research on novel semiconductor nano-device electrical fabrication, RF and DC characterization and metrology.

Design, fabrication and transport measurements in single III-V semiconductor nanowire-based transistors o Nanoscale devices design and fabrication: photomask design, photo-lithography, thin film deposition, lift-off, etching, surface metrology and wire bond. o Low signal level, low noise measurements of nonlinear dI/dV characteristics of sub-micron devices. o Measurement and Analysis programming codes written and debugged using Wavemetrics IGOR Pro, a C based language software; A custom automated characterization system built for low temperature measurement controlled via IGOR codes.

Analytical calculation for semiconductor electrical properties (carrier density and mobility) and metal- semiconductor interface (MSI) at nanoscales and estimation of doping level after nanowire growth. o Calculation for any shallow dopant species ionization energy in all kinds of semiconductor host matrix and consistency check with measurements data. o Calculation for free carrier concentrations inside nanowires in the presence of an electrically active surface and discussion about the dielectric confinement effect. o Calculation for Metal-Semiconductor Interface (MSI) and transport; Improvement for thermodynamic consistency of the Schottky tunnel barrier profile. o Calculation and estimation for Metal-Insulator-Nanowire structure properties including gate capacitance, depletion width/profile, charge and field distribution, breakdown voltage. o Operation of high vacuum cryogenic systems including Janis continuous He flow cryostat and Leiden Cryogenics Dilution Refrigerator.

Collaboration with L-3 CINCINNATI ELECTRONICS: characterized the sensitivity, stability and noise level of their latest products using automated low level measurement system.

Microwave frequency circuit simulations and analysis. o Simulation of the microwave field irradiation for a coplanar waveguide resonator via HFSS software and prospecting an application for carrier dynamics for semiconductor characterizations. o Fabrication of a coplanar waveguide resonator to verify the simulation and increasing signal to noise by a factor of 100 via packaging in a shielding copper box with surface mount launches. o Operation of vector network analyzer for microwave circuitry analysis.

Collaboration with a group in Biomedical Engineering Department, University of Cincinnati. Provided numerical calculation of the Electric field distribution for two configurations: cavity resonator and capacitor using a three-dimensional model of the apparatus ANSYS HFSS software. [Ref.]

Supervision of undergraduate students.

o Training for cryogenic operation, data acquisition and organization. o Instruction in metal film deposition, surface metrology and equipment operation of probe station, wire bonder and vector network analyzer.

o Supervision of an undergraduate to translate programming codes in C language to a Web-based format using JavaScript and the numerical analysis work is available at: https://github.uc.edu/pages/perryao/carrier-density-calculator/public/. LIST OF TECHNICAL EXPERIENCE

Spin coater & MJB3 Mask Aligner (6+ years)

Nanoimprint Nanonex-2600 NIL (2+ years)

Raith 150 E-Beam Lithography (2+ years)

KLA TENCOR PROFILOMETER (6+ years)

RUDOLPH AUTO ELLIPSOMETER (6+ years)

Westbond 7476D Wire Bonder (6+ years)

HP Vector Network Analyzer (6+ years)

Janis Continuous Flow Cryostat & Leiden

Cryogenics Dilution Refrigerator (6+ years)

5210 Dual-Phase Analog Lock-In Amplifier

(6+ years)

DL instrument 1201 Volt Amplifier/1211

Current Amplifier (6+ years)

AutoCAD for 2D & 3D structures (6+years)

EDUCATION

Ph.D. & M.S. in PHYSICS, University of Cincinnati, Cincinnati, OH, USA (GPA: 3.8/4) August 2016 (expected)

Graduate Poster Forum winner, First Prize, University of Cincinnati (2014)

Henry Laws Research Fellowship, University of Cincinnati (2014)

University Graduate Scholarship, University of Cincinnati (2009-2016) B.S. in APPLIED PHYSICS, Donghua University, Shanghai, China (GPA: 3.8/4) June 2008

University Undergraduate Scholarship, Donghua University (2005-2008) SELECTED Conferences

“Electron transport in doped GaAs nanowires contacted by evaporated metal films”, Zhuting SUN, Andrei Kogan, Tim Burgess, Chennupati Jagadish, American Physical Society March Meeting, Baltimore, 2016

“Electron transport in Individual GaAs Nanowires”, Zhuting SUN, Andrei Kogan, Tim Burgess, Chennupati Jagadish, American Physical Society March Meeting, Denver, 2014

“Electron transport in Individual GaAs Nanowires”, Zhuting SUN, Andrei Kogan, Tim Burgess, Chennupati Jagadish, American Physical Society Fall Meeting, Cincinnati, 2013 PUBLICATIONS

Zhuting SUN, Andrei Kogan, Tim Burgess, Chennupati Jagadish, “Electron transport in doped GaAs nanowires contacted by evaporated metal films”, manuscript in final form to be submitted to APL, preprint available

Zhuting SUN, Andrei Kogan, “Ionization energy of single dopants in semiconductors”, manuscript in final form to be submitted to APL, preprint available

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