Journal publications since joining UB in 2017

P. Paul, S.J. Addamane, P.Q. Liu, “Mid-Infrared Intersubband Cavity Polaritons in Flexible Single Quantum Well”, Nano Letters 23, 2890 (2023). Link

P.Q. Liu, X. Miao, S. Datta, “Recent Advances in Liquid Metal Photonics: Technologies and Applications”, Optical Materials Express 13, 699 (2023). Link

X. Miao, T.S. Luk, P.Q. Liu, Liquid-Metal-Based Nanophotonic Structures for High-Performance SEIRA Sensing”, Advanced Materials 34, 2107950 (2022). Link

P. Paul, P.Q. Liu, “Dynamically Reconfigurable Bipolar Optical Gradient Force Induced by Mid-Infrared Graphene Plasmonic Tweezers for Sorting Dispersive Nanoscale Objects”, Advanced Optical Materials 10, 2101744 (2022). Link

X. Miao, L. Yan, Y. Wu, P.Q. Liu, “High-Sensitivity Nanophotonic Sensors with Passive Trapping of Analyte Molecules in Hot-Spots”, Light: Science and Applications 10, 5 (2021). Link

P.Q. Liu, P. Paul, “Graphene Nanoribbon Plasmonic Conveyor Belt Network for Optical Trapping and Transportation of Nanoparticles”, ACS Photonics 7, 3456-3466 (2020). Link

A.M. Katzenmeyer, T.S. Luk, E. Bussmann, S. Young, E.M. Anderson, M.T. Marshall, J.A. Ohlhausen, P. Kotula, P. Lu, D.M. Campbell, T.-M. Lu, P.Q. Liu, D.R. Ward, S. Misra, “Assessing Atomically-Thin Delta-Doping of Silicon Using Mid-IR Ellipsometry”, Journal of Materials Research 35, 2098-2105 (2020). Link


G. Li, V. Semenenko, V. Perebeinos, P.Q. Liu, “Multilayer Graphene Terahertz Plasmonic Structures for Enhanced Frequency Tuning Range”, ACS Photonics 6, 3180-3185 (2019). Link

X. Miao, G. Li, L. Xiao, P.Q. Liu, “Graphene Anti-Dot Terahertz Plasmonic Metasurfaces Employing Self-Aligned Metal Cores for Sensing Applications”, ACS Applied Nano Materials 2, 6798-6803 (2019). Link

M. Woerner, C. Somma, K. Reimann, T. Elsaesser, P.Q. Liu, Y. Yang, J.L. Reno, I. Brener, “Terahertz Driven Amplification of Coherent Optical Phonons in GaAs Coupled to a Metasurface”, Physical Review Letters 122, 107402 (2019). Link 

P.Q. Liu, J.L. Reno, I. Brener, “Quenching of Infrared-Active Optical Phonons in Nanolayers of Crystalline Materials by Graphene Surface Plasmons”, ACS Photonics 5, 2706-2711 (2018). Link

M. Tamagnone, T.M. Slipchenko, C. Moldovan, P.Q. Liu, A. Centeno, H. Hasani, A. Zurutuza, A.M. Ionescu, L. Martin-Moreno, J. Faist, J.R. Mosig, A.B. Kuzmenko, J.-M. Poumirol, “Magnetoplasmonic Enhancement of Faraday Rotation in Patterned Graphene Metasurfaces”, Physical Review B 97, 241410 (2018). Link


G.R. Keiser, N. Karl, P.Q. Liu, C. Tulloss, H.-T. Chen, A.J. Taylor, I. Brener, J.L. Reno, D.M. Mittleman, “Nonlinear Terahertz Metamaterials with Active Electrical Control”, Applied Physics Letters 111, 121101 (2017). Link

M.C. Zheng, Y.M. Zhang, P.Q. Liu, X. Wang, J.-Y. Fan, M. Troccoli, C.F. Gmachl, “High-Power Spiral Cavity Quantum Cascade Superluminescent Emitters with a Passive Loop Back Facet”, Optical Engineering 57, 011001 (2017). Link

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). Link

Selected journal publications before 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). Link

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, 8969 (2015). Link

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). Link

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). Link

P.M. Bouzi, P.Q. Liu, N. Aung, X. Wang, J.-Y. Fan, M. Troccoli, C.F. Gmachl, “Suppression of Pointing Instability in Quantum Cascade Lasers by Transverse Mode Control,” Applied Physics Letters 102, 122105 (2013). Link

A. Sadeghi, P.Q. Liu, X. Wang, C.F. Gmachl, “Wavelength Selection and Spectral Narrowing of Distributed Bragg Reflector Quantum Cascade Lasers up to Peak Optical Power,” Optics Express 21, 31012-31018 (2013). Link

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). Link

Y. Chiu, Y. Dikmelik, P.Q. Liu, N.L. Aung, J.B. Khurgin, C.F. Gmachl, “Importance of Interface Roughness Induced Intersubband Scattering in Mid-Infrared Quantum Cascade Lasers,” Applied Physics Letters 101, 171117 (2012). Link

S. Liu, E. Lalanne, P.Q. Liu, X. Wang, C.F. Gmachl, A.M. Johnson, “Femtosecond Carrier Dynamics and Nonlinear Effects in Quantum Cascade Lasers,” IEEE Journal of Selected Topics in Quantum Electronics 18, 92-104 (2012). Link

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). Link

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). Link

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). Link

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). Link

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, “Quantum Cascade Laser Open-Path System for Remote Sensing of Trace Gases in Beijing, China,” Optical Engineering 49, 111125 (2010). Link

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). Link


1. 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).

2. Qiang Liu, Kamil Sladek, Claire F. Gmachl, “Single-Mode Quantum Cascade Lasers Having Shaped Cavities,” United States, patent No. US9014230 B2 (2011).

3. Mei Chai Zheng, Qiang Liu, Claire F. Gmachl, “Single-mode Quantum Cascade Lasers with Enhanced Tuning Range,” United States, patent No. US9088126 B2 (2013).