Peter Q. Liu

Assistant Professor

Specialty/Research Focus: 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. 

Contact Information

230 J Davis Hall

Buffalo, NY 14260

Phone: (716) 645-1037


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J-M. Poumirol, P.Q. Liu, T. M. Slipchenko, A. Y. Nikitin, L. Martin-Moreno, J. Faist, A. B. Kuzmenko, “Electrically controlled terahertz magneto-optical phenomena in continuous and patterned graphene,” Nature Communications 8, 14626 (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, I.J. Luxmoore, S.A. Mikhailov, N.A. Savostianova, F. Valmorra, J. Faist, G.R. Nash, “Highly tunable metamaterials employing split-ring resonators strongly coupled to graphene surface plasmons,” Nature Communications 6, No. 8969 (2015).

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).

P.Q. Liu, X. Wang, C.F. Gmachl, “Single-mode quantum cascade lasers employing asymmetric Mach-Zehnder interferometer type cavities,” Applied Physics Letters 101, 161115 (2012).

P.Q. Liu, K. Sladek, X. Wang, J.-Y. Fan, C.F. Gmachl, “Single-mode quantum cascade lasers employing a candy-cane shaped monolithic coupled cavity,” Applied Physics Letters 99, 241112 (2011).

P.Q. Liu, X. Wang, J.-Y. Fan, C.F. Gmachl, “Single-mode quantum cascade lasers based on a folded Fabry-Perot cavity,” Applied Physics Letters 98, 061110 (2011).

P.Q. Liu, A.J. Hoffman, M.D. Escarra, K.J. Franz, J.B. Khurgin, Y. Dikmelik, X. Wang, J.-Y. Fan, C.F. Gmachl, “Highly Power-efficient Quantum Cascade Lasers,” Nature Photonics 4, 95 - 98 (2010). 

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).

A.P.M. Michel, P.Q. Liu, J.K. Yeung, P. Corrigan, M.L. Baeck, Z. Wang, T. Day, G. Wysocki, F. Moshary, C.F. Gmachl, J.A. Smith, “Open Path Remote Sensing of Multiple Trace Gases Using a Widely Tunable Quantum Cascade Laser in Beijing, China,” Optical Engineering 49, 111125 (2010).

J.B. Khurgin, Y. Dikmelik, P.Q. Liu, A.J. Hoffman, M.D. Escarra, K.J. Franz, C.F. Gmachl, “Role of interface roughness in the transport and lasing characteristics of quantum-cascade lasers,” Applied Physics Letters 94, 091101 (2009).  



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 with Enhanced Tuning Range,” United States, patent No. US9088126 B2 (2013).