Research Associate Scientist, University of California Berkeley
(July 2008 – 2010,Prof. Grigoropoulos)
&
Lawrence Berkeley National Laboratory (January 2007 – 2010)
(July 2008 – 2010,Prof. Grigoropoulos)
&
Lawrence Berkeley National Laboratory (January 2007 – 2010)
(1) Tip-based Nanomanufacturing (TBN) - funded by DARPA, Main PI:Prof. Grigoropoulos
- Development of controllable & scalable nanostructuring systems utilizing tip-enhanced optical near-fields
(2) In-situ monitoring of light-material interaction by near-field probes coupled in Electron Microscopes-funded by STTR/DOE
Collaboration with Prof. Andrew Minor, National Center for Electron Microscopy, LBNL, and MSE/UCB
- In-situ laser material processings in a Scanning Electron Microscope (SEM) and an environmental SEM - In-situ monitoring of light-matters interaction in a Transmission Electron Microscope (TEM) - In-situ diagnostics of laser-induced crystallization of a-Si thin film solar cell system, and optimization of laser parameters (details to be updated) |
(3) Photonic Energy Activated Green Production of Hydrogen in Fuel Cell System
Funded by KAUST, Saudi Arabia
- Solar light-induced Hydrogen generation from nano
-catalysts dispersed in water-methanol system.
(4) Development of Laser Scribing System for thin Solar-Cell fabricationFunded by SNUPrecision, Korea
Collaboration with Prof. Heui Jae Pahk in Mechanical EngineeringDepartment, Seoul National University, Korea, and Appliflex Inc. USA
- Development of high speed laser scribing systems based on high repetition rate pulsed lasers - Optimization of laser parameters and advanced diagnostics of a-Si and CIGS based thin film solar cell devices - In-situ thickness monitoring by laser-induced breakdown spectroscopy (LIBS)- Scribing performance improvement by gas injection (details to be updated) |
(5) CIGS thin Solar-Cell device fabricationFunded by DOE
Collaboration with Lawrence Livermoore National Laboratory
- Scribing process testing for cost-effective CIGS solar cell film system (to be updated)
Collaboration with Lawrence Livermoore National Laboratory
- Scribing process testing for cost-effective CIGS solar cell film system (to be updated)
(6) Rapid laser processing for buried contact solar cell devicesCollaboration with Appliflex, USA
- via-hole fabrications in c-Si, mc-Si, and SiC wafers for buried contact solar cell (details to be updated
- via-hole fabrications in c-Si, mc-Si, and SiC wafers for buried contact solar cell (details to be updated
(7) Selective Annealing of a-Indium-Tin-Oxide (ITO) thin films by ultrafast lasers for electro-opto-bio device fabrication
Collaboration with ITRI, Taiwan
- Direct writing of transparent electrode patterns for energy / opto-fluidic-bio device fabrication (details to be updated
Collaboration with ITRI, Taiwan
- Direct writing of transparent electrode patterns for energy / opto-fluidic-bio device fabrication (details to be updated
(8) Selective magnetic activation by optical far- and near-fields, for spintronics device fabrication
Collaboration with Prof. Oscar Dubon in Material Science Department, UC Berkeley
- Selective micro/nanoscale activation of electronic & magnetic quantum dots by pulsed laser illumination for spintronic devices - ns/fs laser schemes and optical far- / near-fields testing - Potential of lasers in terms of selective doping & activation of devices |
(9) Development of scalable nanomanufacturing bench based on the optical near-field – funded by NSF
Collaboration with Prof. Dieter Baeuerle, in University of Linz, Austria
- Scalable nanomanufacturing bench utilizing optical near-field probe array scheme
(10) Fabrication of three-dimensional hybrid opto-fluidic devices by femtosecond laser - funded by NSF
- Development of hybrid opto-fluidic structures for energy/biological applications
- Glass based microstructures with superior chemical/thermal/mechanical/fluidic/optical stabilities
(11) Fabrication of three-dimensional biological cell growth & migration platforms by ultrafast lasers
Collaboration with Prof. Hidai Hirofumi in Tokyo Institute of Technology
- Fabrication of two- & three- dimensional bio-compatible polymer patterns and study on cell behavior
- High aspect ratio structure fabrication utilizing nonlinear beam propagation Investigation of high aspect ratio two photon polymerization structure formation process
Collaboration with Prof. Hidai Hirofumi in Tokyo Institute of Technology
- Fabrication of two- & three- dimensional bio-compatible polymer patterns and study on cell behavior
- High aspect ratio structure fabrication utilizing nonlinear beam propagation Investigation of high aspect ratio two photon polymerization structure formation process
、
(1) Micro/Nanoscale Chemical Speicies Analysis by Laser-Induced Breakdown Spectroscopy (LIBS)
Funded by Army/STTR Program, Collaboration with Applied Spectra Inc.
- Introduction to LIBS (Applied Spectra Inc. Collaborator)
- Optical far- & near-field based laser ablation physics and subsequent chemical species analysis by LIBS
Funded by Army/STTR Program, Collaboration with Applied Spectra Inc.
- Introduction to LIBS (Applied Spectra Inc. Collaborator)
- Optical far- & near-field based laser ablation physics and subsequent chemical species analysis by LIBS
(2)Optical near-field based Scalable & Integratable nanomanufacturing
-Part of SINAM (Scalable & Integratable nanomanufacturing) project funded by NSF, Prof. X. Zhang in ME/UCB
- Involved for demonstration of nanoscale laser based material processings
(3) Ultrafast laser based micro/nanoscale protein patterning for cell growth/migration study
- funded by NIHCollaboration with Prof. Kevin Healy, in Material Science & Bioengineering Department, UC Berkeley
- Ultra high resolution protein patterning utilizing nonlinear characteristics of femtosecond laser
(details to be updated after publication)
-Part of SINAM (Scalable & Integratable nanomanufacturing) project funded by NSF, Prof. X. Zhang in ME/UCB
- Involved for demonstration of nanoscale laser based material processings
(3) Ultrafast laser based micro/nanoscale protein patterning for cell growth/migration study
- funded by NIHCollaboration with Prof. Kevin Healy, in Material Science & Bioengineering Department, UC Berkeley
- Ultra high resolution protein patterning utilizing nonlinear characteristics of femtosecond laser
(details to be updated after publication)
(4) Scanning Probe based Photo-Electron-Emission-Microscopy (SP-PEEM) of nanostructures
Collaboration with Prof. Fotakis, FORTH, Greece
- Laser enhanced SP-PEEM characterization of nanostructures
Collaboration with Prof. Fotakis, FORTH, Greece
- Laser enhanced SP-PEEM characterization of nanostructures
(5) Active glass nanoparticle generation by ultrashort laser pulses
Collaboration with Asahi Glass Company, Japan
- Fabrication of active glass material based nanoparticles by ultrashort pulsed lasers
- Demonstration of active glass nanoparticles as green fluorescent sources by near-IR pumping
Collaboration with Asahi Glass Company, Japan
- Fabrication of active glass material based nanoparticles by ultrashort pulsed lasers
- Demonstration of active glass nanoparticles as green fluorescent sources by near-IR pumping
Graduate Student Researcher (Ph.D. Course)
Laser Thermal Lab. University of CaliforniaBerkeley
(2000 – 2008), Prof. Grigoropoulo
Laser Thermal Lab. University of CaliforniaBerkeley
(2000 – 2008), Prof. Grigoropoulo
(1) Ultrafast Phase Change Diagnostics by Time-resolved Pump-and-probe Diagnostics Tehcnique
- Introduction: thermal time scales in phase change process of solids
- Introduction: ultrafast time-resolved pump-and-probe measurement technique
- Studies on phase change process induced by ultrashort pulse excitation
- Introduction: thermal time scales in phase change process of solids
- Introduction: ultrafast time-resolved pump-and-probe measurement technique
- Studies on phase change process induced by ultrashort pulse excitation
(2) Liquid-assisted three-dimensional microchannel fabrication in glass by femtosecond laser
- Liquid-assisted three-dimensional microchannel fabrication in glass and studies on the laser-assisted drilling process
- Self-guided liquid-assisted drilling process in glass
- Liquid-assisted three-dimensional microchannel fabrication in glass and studies on the laser-assisted drilling process
- Self-guided liquid-assisted drilling process in glass
(3) Optical near-field based nanoprocessing
- Introduction to the optical near-field
- Optical near-field based ablation
- Optical near-field based crystallization and chemical vapor deposition
- Introduction to the optical near-field
- Optical near-field based ablation
- Optical near-field based crystallization and chemical vapor deposition
Researcher, Samsung Advanced Institute of Technology
South Korea (1997 – 2000)
South Korea (1997 – 2000)
Graduate Student Researcher (Master Course)
Mechatronics & MEMS Lab
Mechanical Engineering Department of Seoul National University
South Korea (1995-1997, Prof. Sangken Kauh)
Mechatronics & MEMS Lab
Mechanical Engineering Department of Seoul National University
South Korea (1995-1997, Prof. Sangken Kauh)
(1) Mechatronics related to heat transfer control (various thermal-fluidic measurement & control techniques).example.
Hot wire anamometer
(2) Development of CPU & PC-interface based Automotive Engine (SI) Controller
(3) Temperature Compensation of transit time difference type ultrasonic air flowmeter and measurement of engine intake flow & Development of self-correlated ultrasonic air flowmeter
Hot wire anamometer
(2) Development of CPU & PC-interface based Automotive Engine (SI) Controller
(3) Temperature Compensation of transit time difference type ultrasonic air flowmeter and measurement of engine intake flow & Development of self-correlated ultrasonic air flowmeter