Mid-infrared and THz optoelectronics and photonics; graphene and other 2D materials based devices and systems; strongly correlated electron materials; quantum optics; quantum cascade lasers; chemical and biological sensing
J-M. Poumirol, P.Q. Liu, T. M. Slipchenko, A. Y. Nikitin, L. Martin-Moreno, J. Faist, A. B. Kuzmenko, "Broadly tunable and electrically invertible non-reciprocal manipulation of the terahertz waves using graphene," Nature Communications, in press (2017).
I.J. Luxmoore, P.Q. Liu, P. Li, J. Faist, G.R. Nash, "Graphene-Metamaterial Photodetectors for Integrated Infrared Sensing," ACS Photonics 3, 936-941 (2016).
P.Q. Liu, F. Valmorra, C. Maissen, J. Faist, "Electrically tunable graphene anti-dot array terahertz plasmonic crystals exhibiting multi-band resonances," Optica 2, 135-140 (2015).
I.J. Luxmoore, C.H. Gan, P.Q. Liu, F. Valmorra, P. Li, J. Faist, G. Nash, "Strong Coupling in the Far-infrared between Graphene Plasmons and the Surface Optical Phonons of Silicon Dioxide," ACS Photonics 1, 1151-1155 (2014).
K.J. Franz, P.Q. Liu, J.J.J. Raftery, M.D. Escarra, A.J. Hoffman, S.S. Howard, Y. Yao, Y. Dikmelik, X. Wang, J.-Y. Fan, J.B. Khurgin, C. Gmachl, "Short Injector Quantum Cascade Lasers," IEEE Journal of Quantum Electronics 46, 591-600 (2010).
Qiang Liu, Yu Yao, Anthony J. Hoffman, Matthew D. Escarra, Kale J. Franz, Jacob B. Khurgin, Yamac Dikmelik, William O. Charles, Jianxin Chen, Claire F. Gmachl, "Highly Power-Efficient and Broadband Quantum Cascade Lasers," United States, patent No. US8644358 B2 (2010).
Qiang Liu, Kamil Sladek, Claire F. Gmachl, "Single-Mode Quantum Cascade Lasers Having Shaped Cavities," United States, patent No. US9014230 B2 (2011).
Mei Chai Zheng, Qiang Liu, Claire F. Gmachl, "Single-mode Quantum Cascade Lasers Employing an Asymmetric Mach-Zehnder Interferometer Type Cavity," United States, patent No. US9088126 B2 (2013).