Ph. D. Georgia Institute of Technology, Atlanta, Georgia, USA July, 2007
Major: Electrical and Computer Engineering
Advisor: Prof. David S. Citrin
Dissertation: Optimization of Optical Nonlinearities in Quantum Cascade Lasers
M. S. Georgia Institute of Technology, Atlanta, Georgia, USA August, 2003
Major: Electrical and Computer Engineering
M. Eng. Nanyang Technological University (NTU), Singapore February, 1999
Major: Mechanical and Production Engineering
Advisor: Prof. Zhongmin Xiao
Dissertation: Electro-Elastic Stress Analysis on Piezoelectric Inhomogeneity-Crack Interaction
B. Eng. Tsinghua University, Beijing, P. R. China July, 1996
Major: Mechanical Engineering

Nominated for the Outstanding Graduate Advisor Award in 2016
 2012 Young Teacher Award in Swenson College of Science and Engineering (SCSE) at University of Minnesota Duluth (UMD)
 Tsinghua University Excellent Student Award (1992-1995)

1. J. Bai, H. Wang, J. Zhang and F. Liu, “A comparative study of effects of group-velocity dispersion on midinfrared quantum-cascade lasers with Fabry-Perot and ring cavities.” Submitted to Journal of Nanophotonics, currently under review.
2. J. Bai, H.Wang, Q.Wang, D. Zhou, K. Le*, and B. Wang*, “Coherent pulse progression of mid-infrared quantum-cascade lasers under group-velocity dispersion and self-phase modulation,” IEEE Journal of Quantum Electronics, vol.52, no. 9, September, 2016.
3. K. Le*, J. Bai, Q. M. Ngo, and P. Chen, “Fabrication and numerical characterization of infrared, metamaterial absorbers for refractometric biosensors,” Journal of Electronic Materials, DOI: 10.1007/s11664-016-4979-2 (Published online in October 2016).2/10
4. D Zhou, H. Wang, and Jing Bai, “Conformable pressure sensor array based on silver nanowires and PDMS for electronic skin application”, Sensor Letters, 15(1): 11-18, January. 2017.
5. K. Le*, J. Bai, and P. Chen, “Perfect antireflection fiber arrays for absorption enhancement in thin-film organic tandem solar cells,” IEEE Journal of Selected Topics in Quantum Electronics, vol. 22, no. 1, 4100406, January/February, 2016.
6. K. Le*, J. Bai, and H. P. T. Nguyen, "Fano-induced spontaneous emission enhancement of molecule placed in a cluster of asymmetrically-arranged metallic nanoparticles," Journal of Luminescence, vol. 173, pp. 199-202, Jan. 2016.
7. D. Zhou, Y. Sun*, J. Bai, E. Hauser, S. Wang, and B. Han “Modeling and experimental investigation of the maximum stresses due to bending in a tubular-shaped artificial skin sensor,” IEEE Sensors Journal, vol. 16, no. 6, pp. 1549-1556, March 2016.
8. K. Le*, M. Nixon, and J. Bai, “Calibrated dielectric fiber arrays for light-trapping enhancement in organic solar cells," IEEE Journal of Photovoltaics, vol. 5, no. 4, pp.1125-1129, July 2015.
9. K. Le* and J. Bai, "Enhanced absorption efficiency of ultrathin metamaterial solar absorbers by plasmonic Fano resonance," Journal of the Optical Society of America B, vol. 32, no. 4, pp. 595-600, April 2015.
10. K. Le*, A. Alu, and J. Bai, "Multiple Fano interferences in a plasmonic metamolecule consisting of asymmetric metallic nanodimers," Journal of Applied Physics, vol. 117, no. 2, 023118, January 2015.
11. D. Zhou, H. Wang, J. Bai and J. Cao, “Effects of oxygen plasma treatment and E-beam evaporation on AgNWs/PDMS based stretchable electrode”, Smart Materials and Structures, vol. 23, no. 10, 104001, October 2014.
12. J. Bai and D. Zhou, "Effect of group-velocity dispersion on the stability of quantum-cascade lasers," Journal of Nanophotonics, vol. 7, no. 1, 073079, October 2013.
13. X. Qian* and J. Bai, "Theoretical studies of the optical properties of hollow spherical metallic nanoshells," Journal of Computational and Theoretical Nanoscience, vol. 10, no. 10, pp. 1-7, October 2013.
14. J. Bai, G. Sileshi*, S. Burns, G. Nordehn, L. Wittmers, "Development of laser-based heart sound detection system," Journal of Biomedical Science and Engineering, vol. 5, no. 1, pp. 34-37, 2012.
15. J. Bai, “Phase Instability and amplitude instability of quantum-cascade lasers with Fabry-Perot cavity”, IEEE Transactions on Nanotechnology, vol. 11, no.2, pp. 292-297, 2012.
16. J. Bai, “Effect of self-phase modulation on the instabilities of quantum-cascade lasers”, Journal of Nanophotonics, vol. 4, 043519, 2010.
17. J. Bai and S. Butt*, “Finite Difference analysis of confined states in quantum-dot system with an efficient mesh strategy”, Journal of Computational and Theoretical Nanoscience, vol. 7, no. 10, pp. 1955-1958, 2010.
18. J. Bai, "A generalized modeling strategy of quantum-cascade structures with resonance-enhanced harmonic oscillations", Physica E, vol. 41, no. 5, pp. 843-847, March, 2009.
19. J. Bai and D. S. Citrin, "Intracavity nonlinearities in quantum-cascade lasers", Applied Physics Reviews-Focused Review, Journal of Applied Physics, vol. 106, no. 3, 031101, Aug. 2009. (Appear as the cover article of the issue)3/10
20. J. Bai and D. S. Citrin, "Enhancement of optical Kerr effect in quantum-cascade lasers with multiple resonance levels", Optics Express, vol.17, no. 16,pp. 12599-12606, August, 2008.
21. J. Bai and D. S. Citrin, “Design of nonlinearity-enhanced quantum cascade lasers”, Optical and Quantum Electronics, vol. 40, no. 2-4, pp. 191-195, March, 2008.
22. J. Bai and D. S. Citrin, “Optical and transport characteristics of quantum cascade lasers with optimized second harmonic generation”, IEEE Journal of Quantum Electronics, vol. 43, no. 5, May 2007.
23. J. Bai and D. S. Citrin, “Supersymmetric optimization of second-harmonic generation in mid-infrared quantum cascade lasers,” Optics Express, vol. 14, no. 9, pp. 4043-4048, March, 2006.
24. Z. M. Xiao and J. Bai, “Numerical simulation on a coated piezoelectric sensor interacting with a crack,” Finite Elements in Analysis and Design, 38: 691-706, 2002.
25. Z. M. Xiao J. Bai, and R. Maeda, “Electro-static stress analysis on piezoelectric inhomogeneity-crack interaction,” International Journal of Solids and Structure, 38: 1369-1394, 2001.
26. Z. M. Xiao and J. Bai, “On piezoelectric inhomogeneity related problem - part I: a close-form solution for the stress field outside a circular piezoelectric inhomogeneity,” International Journal of Engineering Science, 37:945-959, 1999.
27. Z. M. Xiao and J. Bai, “On piezoelectric inhomogeneity related problem - part II: a circular piezoelectric inhomogeneity interacting with a nearby crack,” International Journal of Engineering Science, 37:961-976, 999.

1. Y. Sun*, J. Bai and D. Zhou, “Fabrication and Test of a Tube Shaped E-Skin Sensor on a Colon Simulator,” 17th IEEE International Conference on Nanotechnology (IEEE NANO 2017), Pittsburgh, PA, USA, July 25-28, 2017.
2. J. Bai, H. Wang, and D. Zhou, “Coherent pulse progression in nonlinear quantum-cascade laser medium under group-velocity dispersion,” SPIE Photonics West, San Francisco, CA, USA, January 28-February 2, 2017.
3. J. Bai, H. Wang, and D. Zhou, "Investigation on soliton related effects in mid-infrared quantum-cascade lasers", The 2016 IEEE Photonics Conference/ 29th Annual Conference of the IEEE Photonics Society, Waikoloa, Hawaii, USA, October 2-6, 2016.
4. J. Bai, H. Wang, Q. Wang, D. Zhou, K. Le*, and Bo. Wang*, "Coherent pulse propagation in md-infrared quantum-cascade lasers with nonlinear dispersive gain medium", OSA Conference on Mid-Infrared Coherent Sources (MICS), Hilton Long Beach, Long Beach, March 20-22, CA, 2016.
5. J. Bai and D. Zhou, “Stability Analysis of quantum-cascade lasers with intracavity nonlinearity and croup-velocity dispersion”, Nonlinear Optics 2015, Kauai, Hawaii, USA, July 26-31, 2015.
6. Y. Sun*, D. Zhou, J. Bai, H. Wang, and J. Cao, "Design and Evaluation of a Highly Stretchable and Conductive Thin Film for Tactile Sensors", 2015 TechConnect World Innovation Conference in Washington, DC, June 14-17, 2015.
7. H. Wang, J. Bai, J. Cao and D. Zhou, "Effects of oxygen plasma treatment and e-beam evaporation on AgNWs/PDMS based stretchable electrode," 2014 MRS Spring Meeting4/10
& Exhibit, Symposium R: Materials Challenges and Integration Strategies for Flexible Energy Devices and Systems, San Francisco, California, April 21-25, 2014.
8. J. Bai, G. Silenshi*, S. Burns, G. Nordehn, and L. Wittmers, "Heart sound detection using laser technology," 2012 Design of Medical Devices Conference (DMD2012), Minneapolis, MN, April 10-12, 2012.
9. J. Bai, “Amplitude instability and phase instability of quantum-cascade lasers under Kerr effect,” IEEE 11th International Conference on Nanotechnology (IEEE-NANO 2011), Portland, Oregon, Aug. 15-19, 2011.
10. X. Qian* and J. Bai, “Strain-tuned light trapping performance of plasmonic solar cells,” the 37th IEEE Photovoltaic Specialist Conference (PVSC), Seattle, Washington, June 19-24, 2011.
11. J. Bai, "Instabilities of quantum-cascade lasers under self-phase modulation," IEEE Proceedings on 2011 International Conference on Electronics and Optoelectronics (ICEOE), V3-258 - V3-261, 2011. DOI: 10.1109/ICEOE.2011.6013353. (Dalian, P. R. China, July 29-31, 2011)
12. J. Bai, G. Nordehn, G. Sileshi*, S. Burns, L. Wittmers, and R. Ulseth,"Optics system design of laser-based stethoscope", 2011 Design of Medical Devices Conference (DMD2011), Minneapolis, MN, April 12-14, 2011.
13. J. Bai and D. Zhou, "Single-mode instability and multi-mode instability of quantum-cascade lasers", IEEE 10th International Conference on Nanotechnology (IEEE-NANO 2010), Seoul, Korea, Aug. 17-20, 2010.
14. D. Zhou and J. Bai, "Infrared (IR) thermal imaging-based automatic tumor tracking during breast cancer radiotherapy", Design of Medical Devices (DMD) Conference, Minneapolis, MN, April 13-15, 2010. Abstract published in Journal of Medical Devices, Vol.4, Issue 2, 2010. DOI:10.1115/1.3454863.
15. J. Bai, “A generalized modeling strategy for quantum-cascade structures with enhanced optical nonlinearities”, The 8th Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim 2009), Shanghai, P.R. China, Aug. 30-Sep. 03, 2009.
16. J. Bai and D. S. Citrin, “Harmonic-resonance enhanced third-order nonlinear susceptibilities in quantum-cascade lasers”, SPIE International Symposium on Photonics Europe, Strasbourg, France, April 7-11, 2008.
17. E. Trybus, O. Jani, S. Burnham, J. Bai, D. S. Citrin, I. Ferguson, W. A. Doolittle, C. Honsberg and M. Steiner, "Characteristics of InGaN Designed for photovoltaic applications", 7th International Conference of Nitride Semiconductors (ICNS-7), Las Vegas, NV, USA, September 16-21, 2007.
18. J. Bai and D. S. Citrin, “Performance analysis of mid-infrared quantum-cascade lasers with enhanced optical nonlinearity”, The 9th International Conference on Intersubband Transitions in Quantum Wells, Ambleside, Cumbria, U.K., September 9-14, 2007.
19. J. Bai and D. S. Citrin, “Design of nonlinearity enhanced quantum-cascade lasers”, PHASE & IPSSO 2007, Metz, France, March 28-30, 2007.
20. J. Bai and D. S. Citrin, “Enhancement of second-harmonic generation in mid-infrared quantum-cascade lasers”, CLEO/QELS, Long Beach, CA, May 21-26, 2006.
21. J. Bai and D. S. Citrin, “Optimization of second-harmonic generation in mid-infrared quantum cascade lasers,” The 4th ESA Workshop on Millimetre Wave Technology and Applications, Espoo, Finland, February 15-17, 2006.5/10
22. J. Bai and D. S. Citrin, “Supersymmetric optimization of second-order nonlinear susceptibilities in long-wavelength quantum-cascade lasers”, The 8th International Conference on Intersubband Transitions in Quantum Wells, Cape Cod, MA, September 11-16, 2005.