Current Research Interests

•Subwavelength lasers

•Carbon nanotube and PbS infrared materials and devices


•Ph.D. in Electrical Engineering, Princeton University, USA (2008)

•M.S. in Optics, Sichuan University, China (2003)

•B.S. in Physics Sichuan University, China (2000)


•Dongxia Qu, Zhijun Liu and Claire Gmachl, A Compact Asymmetric Chaotic Optical Cavity with Long Optical Path Lengths, Applied Physics Letters, vol. 93, p 014101-1-014101-3, 2008

• Zhijun Liu, Claire F. Gmachl, Liwei Cheng, Fow-Sen Choa, Fred J. Towner, Xiaojun Wang, and Jenyu Fan, Temperature Dependence of Optical Gain and Loss in λ≈8.2-10.2 μm Quantum Cascade Lasers, IEEE Journal of Quantum Electronics, vol. 44, no. 5, p 485-492, 2008

• Zhijun Liu, Daniel Wasserman, Scott S. Howard, Anthony J. Hoffman, Claire F. Gmachl, Xiaojun Wang, Tawee Tanbun-Ek, Liwei Cheng, and Fow-Sen Choa, Room Temperature Continuous-wave Quantum Cascade Lasers Grown by MOCVD Without Lateral Regrowth, IEEE Photonics Technology Letters, vol. 18, no. 12, p 1347-1349, 2006

• Jian Z. Chen, Zhijun Liu, Claire F. Gmachl, and Deborah L. Sivco, Silver halide fiber-based evanescent-wave liquid droplet sensing with room temperature mid-infrared quantum cascade lasers, Optics Express, vol. 13, no. 16, p 5953-5960, 2005

• Zhijun Liu, and Baida Lü, Spectral shifts and spectral switches of ultrashort pulsed Gaussian beam passing through a circular aperture, Optik, vol. 115, no. 10, p 447-454, 2004

• Baida Lü, and Zhijun Liu, Propagation properties of ultrashort pulsed Bessel beams in dispersive media, Journal of Optical Society of America A, 20, 582-587, 2003 and Virtual Journal of Ultrafast Science, March 2003

• Zhijun Liu, and Baida Lü, Spatiotemporal behavior of ultrashort pulses in the far field, Optics Communications, 206, 13-18, 2002