SUNWOO LEE

Home Address:

560 Riverside Drive

Apt 8L              

New York, NY 10027

Phone: (518) 524-9949

Email: sl3229@columbia.edu

 

Professional Affiliation:

Electrical Engineering Department

Columbia University

500 West 120th Street, Mudd 1300

New York, NY 10027

                                                                                                                  

 

 

 

 

 

 

 


OBJECTIVE

To integrate graphene NEMS and related systems with conventional CMOS technology with minimal back-end post-processing steps, on which platform graphene and silicon complement one another to realize sensors, filters, and oscillators with the level of performance that is currently unattainable.

 


EDUCATION

 

2012 – present

Ph.D. in Electrical Engineering, Columbia University                                                                

Advisors: Professor James Hone, Kenneth Shepard, and Ioannis Kymissis

Expected Graduation: Early 2015

2010 – 2012

M.S. in Electrical Engineering, Columbia University

2010

B.S. in Electrical and Computer Engineering, Cornell University

                                   

Related Coursework: Electromagnetic Fields & Waves; Fiber and Integrated Optics; Lasers and Optoelectronics; Semiconductor Devices; Quantum and Statistical Mechanics; Microcontrollers; Random Signals and Processes; Digital Signal Processing; Fluid Mechanics; Partial Differential Equations; Adv. Analog Circuits; Microwave Engineering; Device Nanofabrication; Adv. Communication Circuits; Carbon Nanotube Science and Technology

 


PROFESSIONAL EXPERIENCE

 

09/2014 – Present   

Lead Scientist, AnnuloPatch Project

Columbia-Coulter Translational Research Partnership

(*Joint Venture between Hospital for Special Surgery, NY & Columbia University, NY)

Advisors: Prof. Colin Nuckolls, Dr. Josh Schroeder, M.D., and Dr. Frank Cammisa, M.D.

Design and Evaluation of PDMS/Carbon Nanotube Composite Patches for Disc Reherniation Prevention

ŸDeveloped bio-compatible, surface functionalized PDMS/CNT patches with nano-pillars for disk-reherniation prevention.

 

05/2014 – 08/2014   

Summer Intern, Product Engineering

Analog Devices, Inc. Wilmington, MA

Manager: Dr. See-Ho Tsang, Dr. Igor Prikhodko, Dr. Jeffrey Gregory, and Dr. Michael Judy

Design and Evaluation of Next Generation MEMS Gyroscopes

ŸSet up an evaluation system for MEMS gyroscopes by integrating a rate table with a thermal chamber, and designing a mobile electronics module capable of DC and RF characterization.

ŸDesigned a probe card for wafer scale evaluation, as well as a PCB for individual die-level testing.

ŸImplemented automated trimming procedures to improve characterization efficiency, and a PID-controlled real-time mode-matching scheme for enhanced device stability.

 

05/2013 – 08/2013   

Summer Intern, Spintronics and Photovoltaic Division

IBM T.J. Watson Research Center, Yorktown Heights, NY

Manager: Dr. Ching-Tzu Chen and Dr. Daniel Worledge

High Quality CVD Graphene for Spintronics Applications

ŸOptimized the CVD graphene growth process to achieve four-point mobility as high as 30,000 cm2/V-s at room temperature. ŸFabricated graphene-based spintronics devices for high Non-Local Resistance (NLR) at low magnetic field.

ŸAutomated the measurement setup using Matlab to control a parameter analyzer, voltage/current sources, superconducting magnets, a helium monitor, and lock-in amplifiers.

 

06/2008 – 08/2008

Summer Intern, Central Scientific Services Micro-fabrication Lab

IBM T.J. Watson Research Center, Yorktown Heights, NY

Manager: Donna Z. Nielsen

Tin-Solder Electroplating for 3D Flip Chip Integration

ŸSet up Tin-Solder plating baths for Solder Bump Interconnect for 3D System Integrations Group

ŸReduced the plating thickness variation by a factor of three over previous method to enhance device yield

 


RESEARCH

 

2010 – present

Graduate Research Assistant, Hone Group, Columbia University

2011 – present        

Graphene NEMS for CMOS-Compatible Filters and Oscillators

ŸFabricated suspended graphene resonators at the Cornell Nanofabrication Facility and Columbia University Cleanroom using contact lithography, photo-lithography, e-beam lithography, plasma and chemical etching, furnace growth, and thermal and e-beam evaporation

ŸAdapted methods for growing graphene on copper foil using chemical vapor deposition (CVD) and transferring using PDMS stamp onto a substrate in order to make large arrays of suspended graphene resonators

ŸMeasured forward transmission coefficient (S21) of graphene resonators under high vacuum and performed two-tone test to evaluate filter characteristics

ŸDemonstrated electrically tunable self-oscillation of graphene resonator with an external amplifier and a phase shifter

ŸCurrently evaluating the phase noise performance and temperature stability of the oscillator

ŸApplied strain on the suspended graphene membrane using SU-8 polymer to increase the resonant frequency of the resonator by factor of 5 (250MHz – the final goal is 1GHz) with associated quality factor close to 300 at room temperature.

ŸDesigned a layout in TSMC 0.18um technology where graphene resonators can be built on top with post-processing for tunable graphene filter array (in collaboration with Prof. Alyosha Molnar’s Group at Cornell)

 

 

Graphene Nano-Electro-Mechanical Systems (NEMS) Based Accelerometers

ŸFabricated SU-8 clamped graphene drum resonators with a mass of SU-8 on the center.

ŸCurrently conducting a force-displacement test on the fabricated graphene accelerometers using an atomic force microscope (AFM) to validate their theoretical sensitivity.

 

2011 – 2013

Metallization of High-Q Dielectric NEMS Using Graphene

ŸFabricated suspended graphene – silicon nitride heterostructure for high Q tunable NEMS using a novel PMMA/PDMS

transfer method.

ŸMeasured quality factors close to 1,000,000 at room temperature using electrical actuation and optical detection.

ŸDeveloped fabrication processes for full electrical integration using shadow masks and demonstrated electrical actuation and

detection based on capacitive transduction.

ŸDemonstrated the electrostatic tuning of the graphene-metallized Si3N4 resonator and showed the trade-off between the electro

mechanical coupling and quality factor.

 

2010 – 2011

Nano-pillars for Understanding T-cell Activation

ŸFabricated Nano-pillars (diameters ranging from 200nm to several microns), to study the correlation between different

mechanical surroundings and immune cell activation

ŸDeveloped an algorithm for image analysis to track the nanoscale movements of the nano-pillars using Matlab

 

2008 – 2010

Undergraduate Research Assistant, Cornell Nanophotonics Group, Cornell University

Tapered Fiber and Grating Coupler for Low Loss Waveguide Coupling for Optomechanics

ŸDeveloped method of flexible waveguide coupling for microcavity-characterization with low insertion loss using a tapered fiber - set up and optimized tapered fiber fabrication, and automated using LabView.

ŸModeled thermal optomechanical properties of microcavities using Mathematica

ŸFabricated low loss grating coupler to implement VCSEL for on-chip photonics

 

2006 – 2008

Undergraduate Research Assistant, Microelectronic Engineering Department, RIT

Fabrication and Optimization of Magnetic Random Access Memory (MRAM) Devices

ŸConducted design of experiments (DOE) to select optimal metal that minimizes the resistance-area product of the bottom electrode

ŸDeveloped a curing process for Spin-On-Glass (SOG) for an interlayer dielectric (ILD)

                          


HONORS

 

2014    

KSEA-KUSCO Graduate Scholarship for Graduate Students

2013    

Qualcomm Innovation Fellowship (QInF) 2013

Graphene Resonator Based Mixer-First Receiver on CMOS for Digitally Controlled and Widely Tunable RF Interface  

*Recommenders – Prof. James Hone and Prof. Alyosha C. Molnar

2012    

Qualcomm Innovation Fellowship (QInF) 2012

CMOS Compatible Graphene Nanoelectromechanical Systems for Next Generation RF Design  

*Recommenders – Prof. James Hone, Prof. Kenneth Shepard, and Prof. Philip Kim

2011

Outstanding TA Award – Thermodynamics, Mechanical Engineering Department, Columbia University

2008    

American Society of Mechanical Engineers Technical Communication Competition – District A, 1st place   

Topic: Optimization of NiCr Films as Bottom Electrodes for a Magnetic Tunnel Junction Device

2007    

Best Poster Award, RIT Undergraduate Research Symposium - Low Temperature Curing Process for Spin-On-Glass as Interlevel Dielectric

 


PUBLICATIONS

 


P20.


S. Ahn, Y. Yu, G-H. Lee, C. Lee, S. Kang, Y. Zhao, S. Lee, K. Rim, G. W. Flynn, J. Hone, P. Kim, C. Nuckolls, “Epitaxially Self-Assembled Alkane Layers for Graphene Electronics,” in preparation.


P19.


V. V. Deshpande, C. Chen, M. Koshino, S. Lee, A. Gondarenko, A. MacDonald, J. Hone, P. Kim, “Thermodynamic Self Measurement in an

Atomically Thin Electro-Magneto-Mechanical Device,” in preparation.


P18.


S. Lee, C. Chen, W. Cha, V.V. Deshpande, M. Lekas, C. Lee, A. Molnar, K. Shepard, P. Kim, J. Hone, “Capacitive Transduction of Graphene Mechanical Resonators,” in preparation.


P17.


C. Lee, W. Chao, S. Lee, J. Hone, A. Molnar, and S-H. Hong, “A Low Power Edge Detection Image Sensor Based on Parallel Digital Pulse Computation,” IEEE Transactions on Circuits and Systems II, under review.


P16.  


M. Lekas, S. Lee, W. Cha, J. Hone, and K. Shepard, “Third-order Intermodulation Distortion in Graphene Resonant Channel Transistors,” in preparation.


P15.  


A.M. Hurst, S. Lee, W. Cha, and J. Hone, “A Graphene Accelerometer,” Proceedings of the IEEE International Conference on Micro Electro

Mechanical Systems (MEMS) 2015, in press.


P14.  


M. Lekas, S. Lee, W. Cha, J. Hone, and K. Shepard, “Noise Modeling of Graphene Resonant Channel Transistors,” submitted to IEEE Transactions on Electron Devices, under review.


P13.  


Y-D. Kim, H. Kim, Y. Cho, J-H. Ryoo, P. Kim, Y-S. Kim, C-H. Park, S. Lee, Y. Li, S-N. Park, Y-S. Yoo, V. E. Dorgan, E. Pop, T. Heinz, J. Hone, S-H. Chun, H. Cheong, S-W. Lee, M-H. Bae, and Y. D. Park, “Bright visible light emission from electrically biased suspended graphenes,” submitted to Nature Nanotechnology, under review.


P12.  


F. Pizzocchero, B. S. Jessen, N. Kostesha, S. Lee, W. Cha, J. Buron, P. R. Whelan, I. Petrushina, M. B. Larsen, P. Greenwood‖, K. Teo‖, P. U.

Jepsen, J. Hone, P. Bøggild, and T. J. Booth, “Non-destructive Graphene Transfer Based on Reusable Thin-Film Catalysts,” submitted to Carbon,

under review.


P11.  


C. Wang, J. Kim, J. Yang, Y. Zhu, G-H Lee, S. Lee, J. Yu, R. Pei, G. Liu, C. Nuckolls, J. Hone, and Q. Lin, “An Aptameric Graphene

Nanosensor for Label-Free Detection of Small Molecules,” submitted to ACS Nano, under review.


P10.  


C-H. Lee, T. Schiros, E. J. G. Santos, B. Kim, K. G. Yager, S-J. Kang, S. Lee, J. Yu, K. Watanabe, T. Taniguchi, J. Hone, E. Kaxiras, C. Nuckolls, and P. Kim, “Epitaxial Growth of Molecular Crystals on van der Waals Substrates for High-Performance Organic Electronics,” Advanced Materials. doi: 10.1002/adma.201304973 (2014).


P9.  


A. Zandiatashbar, G-H. Lee, S. An, S. Lee, N. Mathew, C. Picu, J. Hone, N. Koratkar, “Effect of Defects on the Intrinsic Strength and Stiffness of Graphene,” Nature Communication. 5 (2014).


P8.  


A.M. Hurst, S. Lee, N. Petrone, J. van de Weert, A. M. van der Zande, and J. Hone, A Transconductive Graphene Pressure Sensor,”

Proceedings of the 17th International Conference on Solid-State Sensors, Actuators, and Microsystems (Transducers 2013), June 16-20, (2013).


P7.  


C. Chen, S. Lee, V.V. Deshpande, G-H. Lee, M. Lekas, K. Shepard, P. Kim, J. Hone, “Tunable graphene mechanical oscillators with tunable

frequencies,” Nature Nanotechnology. 8, 923–927 (2013).

*Covered in Nature Nanotechnology News and Views by Prof. P. X.-L. Feng


P6.  


V.P. Adiga, R. De Alba, I.R. Storch, P. Yu, B. Ilic, R.A. Barton, S. Lee, J. Hone, P.L. McEeuen, J.M. Parpia, H.G. Craighead, “Simultaneous electrical and optical readout of graphene-coated high Q silicon nitride resonators,” Appl. Phys. Lett. 103, 143103 (2013).


P5.  


M. Lekas, S. Lee, C. Chen, W-J Cha, K. Ayyagari, J. Hone, K. Shepard, “Stress-enhanced chemical vapor deposited graphene NEMS RF resonators,” Proceedings of Joint Ultrasonics, Ferroelectrics, and Frequency Control; European Frequency and Time Forum; and Piezoresponse Force Microscopy Workshop (2013).


P4.  


S. Lee, V. Adiga, R. A. Barton, A. M. van der Zande, G-H. Lee, B. R. Ilic, A. Gondarenko, J. M. Parpia, H. G. Craighead, J. Hone, “Graphene Metallization of Si3N4 for High-Q NEMS Resonator,” Nano Lett. 13 (9), 4275-4279 (2013).


P3.  


S. Lee, C. Chen, V. V. Deshpande, G-H Lee, I. Lee, M. Lekas, A. Gondarenko, Y-J Yu, K. L. Shepard, P. Kim, J. Hone,

‘Electrically integrated SU-8 clamped graphene drum resonators for strain engineering,” Appl. Phys. Lett. 102, 153101 (2013).

*Selected for front cover.


P2.  


G-H. Lee, R. Cooper, S. An, S. Lee, A. M. van der Zande, Nicholas Petrone, A. Hammerberg, C. Lee, B. Crawford, J. W. Kysar, and J. Hone, “High Strength Chemical Vapor Deposited Graphene and Grain Boundaries,” Science. 340, 6136, 1073-1076 (2013).


P1.  


G. Wiederhecker, S. Manipatruni, S. Lee, and M. Lipson, “Broadband Tuning of Optomechanical Cavities,” Opt. Express. 19, 2782-2790 (2011).

 


CONFERENCES

 


C10.  


M. Lekas, S. Lee, W-J Cha, S. Peinado, J. Hone, K. Shepard, “A Hybrid Tuned RF Amplifier based on Graphene NEMS Devices,” Materials

Research Society (MRS) Spring Meeting, April 21-25, 2014.


C9.  


C-T. Chen, S. Lee, D. Cutaia, P. Wei, J. Moodera, J. Chudow, D. Worledge, A. Richardella, N. Samarth, “Transport Studies of Exchange Interaction at Magnetic-Insulator/Graphene and Magnetic-Insulator/Topological-Insulator Interfaces,” March American Physical Society (APS) Meeting, March 3-7, 2014.


C8.  


S. Lee, V. Adiga, R. A. Barton, A. M. van der Zande, G-H. Lee, B. R. Ilic, A. Gondarenko, J. M. Parpia, H. G. Craighead, J. Hone, “Graphene

Metallization of Si3N4 for High-Q NEMS Resonator,” Materials Research Society (MRS) Spring Meeting, April 1-5, 2013.


C7.  


R. De Alba, V.P. Adiga, I.R. Storch, P. Yu, B. Ilic, R.A. Barton, S. Lee, J. Hone, P.L. McEeuen, J.M. Parpia, H.G. Craighead, “Graphene on

silicon nitride resonators for optomechanics,” March American Physical Society (APS) Meeting, March 18-22, 2013.


C6.  


C. Chen, S. Lee, V. V. Deshpande, G.H. Lee, M. Lekas, K. Shepard, P. Kim, J. Hone, Self-sustained Graphene Mechanical Oscillators,” March American Physical Society (APS) Meeting, March 18-22, 2013.


C5.  


A. Zandiatashbar, G-H. Lee, S. An, S. Lee, N. Mathew, C. Picu, J. Hone, N. Koratkar, “Effect of Defects on the Intrinsic Strength and Stiffness

of Graphene,” March American Physical Society (APS) Meeting, March 18-22, 2013.


C4.  


S. Lee, R. A. Barton, A.M. van der Zande, G. Lee, A. Gondarenko, J. M. Parpia, H. G. Craighead, J. Hone, “Fabricating Graphene-Silicon

Nitride Heterostructures for High-Q Tunable nanomechanical Resonators,” International Conference on Electron, Ion, and Photon Beam

Technology and Nanofabrication (EIPBN), May 29-June 1, 2012.


C3.  


S. Lee, C. Chen, V. V. Deshpande, G.H. Lee, I. Storch, C. Zhang, Y. Yu, P. Kim, P. McEuen, J.Hone, Novel Fabrication Techniques for Wafer-Scale Graphene Drum NanoElectroMechanical Resonators,” March American Physical Society (APS) Meeting, February 27-March 2, 2012.


C2.  


G. Wiederhecker, S. Manipatruni, S. Lee and M. Lipson, Giant Displacement of Microphotonic Structures Using Optical Forces,” Conference

on Lasers and Electro-Optics (CLEO), May 16-21, 2010.


C1.  


S. S. Mukherjee, S. J. Pandherpure, S. Lee, F. Bai, S. Kurinec, Optimization of Surface Roughness of Sputter Deposited NiCr Films Through

Experimental Design,” Proceedings of the International Conference on Surface Metrology, pp. VIII-2 - 12, October 26-28, 2009.

 


PATENTS

 


2014


A. Hurst, S. Lee, and J. Hone, assigned by Columbia Technology Transfer. “A 2D Material Based Accelerometer,” in preparation for provisional.


2014


Y-D. Kim, S. Lee, L. Wang, Y-D. Park, and J. Hone, assigned by Columbia Technology Transfer. “Bright Broadband and Ultrafast Graphene

Light Emitter,” in preparation for provisional.


2013


C. Lee, S. Lee, and J. Hone, A. Molnar, assigned by Columbia Technology Transfer. “Graphene Resonator Based Mixer-First Receiver on

CMOS for Digitally Controlled and Widely Tunable RF Interface,” submitted for provisional.


2013    


C. Chen, S. Lee, and J. Hone, assigned by Columbia Technology Transfer. “Graphene Mechanical Oscillators with Tunable Frequencies,”

submitted for provisional.

 


PROFESSIONAL ACITIVITIES

 


ŸPeer-Review: Nano Letters, IOPscience Measurement Science and Technology, Advanced Materials


ŸStudent Member of IEEE, APS, and MRS


ŸPresident of Columbia University Korean Engineering Student Association, (2012 - Present)

 


SOFTWARE SKILLS

C, C++, Matlab, Mathematica, Python, Verilog, Cadence SKILL, LabView, COMSOL Multiphysics



Shared 1st author

 

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