Publications

Papers published in peer reviewed journal

Sculpting ultrastrong light-matter coupling through spatial matter structuring
J. Mornhinweg, L. Diebel, M. Halbhuber, J. Riepl, E. Cortese, S. De Liberato, D. Bougeard, R. Huber, and C. Lange
Nanophotonics, in press
arxiv.org:2311.18278

An engineered planar plasmonic reflector for polaritonic mode confinement
S. Rajabali, J. Enkner, E. Cortese, M. Beck, S. De Liberato, J. Faist, and G. Scalari
Optical Materials Express 13, 2944 (2023)
arxiv.org:2212.13482

Launching and manipulation of higher‐order in‐plane hyperbolic phonon polaritons in low‐dimensional heterostructures
G. Lu, Z. Pan, C. R. Gubbin, R. A. Kowalski, S. De Liberato, D. Li, and J. D. Caldwell
Adv. Mater. 35, 2300301 (2023)

Electrical generation of surface phonon polaritons
C. R. Gubbin and S. De Liberato
Nanophotonics 14, 2849 (2023)
arxiv.org:2206.03812

Positronium density measurements using polaritonic effects
E. Cortese, D. B. Cassidy, and S. De Liberato
Phys. Rev. A 107, 023306 (2023)
arxiv.org:2210.09875

Perspective on real-space nanophotonic field manipulation using non-perturbative light-matter coupling
E. Cortese, J. Mornhinweg, R. Huber, C. Lange, and S. De Liberato
Optica 10, 11 (2023)
arxiv.org:2207.11691

Highly nonlinear dipolar exciton-polaritons in bilayer MoS2
B. Datta, M. Khatoniar, P. Deshmukh, F. Thouin, R. Bushati, S. De Liberato, S. Kena Cohen, and V. M. Menon
Nature Communications 13, 6341 (2022)
arxiv.org:2110.13326

Near-field nano-spectroscopy of strong mode coupling in phonon-polaritonic crystals
X. Hu, T. Wing Lo, A. Mancini, C. R. Gubbin, F. Martini, J. Zhang, Z. Gong, A. Politi, S. De Liberato, X. Zhang, D. Lei, S. A. Maier
Appl. Phys. Rev. 9, 021414 (2022)

Anisotropy and modal hybridization in infrared nanophotonics using low-symmetry materials
M. He, T. G. Folland, J. Duan, P. Alonso-González, S. De Liberato, A. Paarmann, J. D. Caldwell
ACS Phot. 9, 1078 (2022)

Quantum theory of longitudinal-transverse polaritons in nonlocal thin films
C. R. Gubbin and S. De Liberato
Phys. Rev. Appl. 17, 014037 (2022)
arxiv.org:2105.13219

Surface phonon polaritons for infrared optoelectronics
C. R. Gubbin, S. De Liberato, and T. G. Folland
J. Appl. Phys. 131, 030901 (2022)
arxiv.org:2107.05084

Exact solution of polaritonic systems with arbitrary light and matter frequency-dependent losses
E. Cortese and S. De Liberato
J. Chem. Phys. 156, 084106 (2022)
arXiv:2111.05258

Polaritonic quantization in nonlocal polar materials
C. R. Gubbin, S. De Liberato
J. Chem. Phys. 156, 024111 (2022)
arXiv:2201.10948

Collective phonon–polaritonic modes in silicon carbide subarrays
G. Lu, C. R. Gubbin, J. R. Nolen, T. Folland, K. Diaz-Granados, I. I. Kravchenko, J. A. Spencer, M. J. Tadjer, O. Glembocki, S. De Liberato, and J. D. Caldwell
ACS Nano 16, 963 (2021)

Polaritonic nonlocality in light-matter interaction
S. Rajabali, E. Cortese, M. Beck, S. De Liberato, J. Faist, and G. Scalari
Nature Photonics 15, 690 (2021)
arXiv:2101.08709

Theoretical proposals to measure resonator-induced modifications of the electronic ground state in doped quantum wells
Y. Wang and S. De Liberato
Phys. Rev. A 104, 023109 (2021)
arXiv:2012.09458

Engineering the Spectral and Spatial Dispersion of Thermal Emission via Polariton–Phonon Strong Coupling
G. Lu, C. R. Gubbin, J. R. Nolen, T. Folland, M. J. Tadjer, S. De Liberato, and J. D. Caldwell
Nano Letters 21, 1831 (2021)

Excitons bound by photon exchange
E. Cortese, L. Tran, J.-M. Manceau, A. Bousseksou, I. Carusotto, G. Biasiol, R. Colombelli, and S. De Liberato
Nature Physics 17, 31 (2021)
arXiv:1912.06124

Impact of phonon nonlocality on nanogap and nanolayer polar resonators
C. R. Gubbin, S. De Liberato
Phys. Rev. B 102, 201302 (2020)
arXiv:2006.05208 

Near-Field Spectroscopy of Cylindrical Phonon-Polariton Antennas
A. Mancini, C. R. Gubbin, R. Berté, F. Martini, A. Politi, E. Cortés, Y. Li, S. De Liberato, and S. A. Maier
ACS Nano 14, 8508 (2020)

Optical Nonlocality in Polar Dielectrics
C. R. Gubbin and S. De Liberato
Phys. Rev. X 10, 021027 (2020)
arXiv:1908.03806

Electro-optical sampling of quantum vacuum fluctuations in dispersive dielectrics
S. De Liberato
Phys. Rev. A 100, 031801 (2019)
arXiv:1811.08682

Multielectron Ground State Electroluminescence
M. Cirio, N. Shammah, N. Lambert, S. De Liberato, and F. Nori
Phys. Rev. Lett. 122, 190403 (2019)
arXiv:1811.08682

Hybrid Longitudinal-Transverse Phonon Polaritons
C. R. Gubbin, R. Berte, M. A. Meeker, A. J. Giles, C. T. Ellis, J. G. Tischler, V. D. Wheeler, S. A. Maier, J. D. Caldwell, and S. De Liberato
Nature Communications 10, 1682 (2019)
arXiv:1807.10903

Strong coupling of ionising transitions
E. Cortese, I. Carusotto, R. Colombelli, and S. De Liberato
Optica 6, 354 (2019)
arXiv:1809.08876

Polaritonics: from microcavities to sub-wavelength confinement
D. Ballarini and S. De Liberato
Nanophotonics 8, 641 (2019)

Ultrastrong coupling between light and matter
A. F. Kockum, A. Miranowicz, S. De Liberato, S. Savasta, and F. Nori
Nature Reviews Physics 1, 19 (2019)
arXiv:1807.11636

Breakdown of gauge invariance in ultrastrong-coupling cavity QED
D. De Bernardis, P. Pilar, T. Jaako, S. De Liberato, and P. Rabl
Phys. Rev. A 98, 053819 (2018)
arXiv:1805.05339

Open quantum systems with local and collective incoherent processes: Efficient numerical simulation using permutational invariance
N. Shammah, S. Ahmed, N. Lambert, S. De Liberato, and F. Nori
Phys. Rev. A 98, 063815 (2018)
arXiv:1805.05129

Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes
I. Razdolski, N. C. Passler, C. R. Gubbin, C. J. Winta, R. Cernansky, F. Martini, A. Politi, S. A. Maier, M. Wolf, A. Paarmann, and S. De Liberato
Phys. Rev. B 98, 125425 (2018)
arXiv:1807.02978

Strong Coupling of Epsilon-Near-Zero Phonon Polaritons in Polar Dielectric Heterostructures
N. C. Passler, C. R. Gubbin, T. G. Folland, I. Razdolski, D. S. Katzer, D. F. Storm, M. Wolf, S. De Liberato, J. D. Caldwell, and A. Paarmann
Nano Letters 18, 4285 (2018)

Sub-nanometer Thin Oxide Film Sensing with Localized Surface Phonon Polaritons
R. Berte, C. R. Gubbin, V. D. Wheeler, A. J. Giles, V. Giannini, S. A. Maier, S. De Liberato, and J. D. Caldwell
ACS Photonics 5, 2807 (2018)

Resolution of superluminal signalling in non-perturbative cavity quantum electrodynamics
C. S. Muñoz, F. Nori, and S. De Liberato
Nature Communications 9, 1924 (2018)
arXiv:1709.09872

Resonant intersubband polariton-LO phonon scattering in an optically pumped polaritonic device
J-M. Manceau, L. Tran, G. Biasiol, T. Laurent, I Sagnes, G. Beaudoin, S. De Liberato, I. Carusotto, and R. Colombelli
Appl. Phys. Lett. 112, 191106 (2018)
arXiv:1803.07510

Strong coupling in a microcavity containing β-carotene
R. T. Grant, R. Jayaprakash, D. M. Coles, A. Musser, S. De Liberato, I. D.W. Samuel, G. A. Turnbull, J. Clark, and D. G. Lidzey
Optics Express 26, 3320 (2018)

Polariton spectrum of the Dicke-Ising model
E. Cortese, L. Garziano, and S. De Liberato
Phys. Rev. A 96, 053861 (2017)
arXiv:1707.03681

Theory of four-wave-mixing in phonon polaritons
C. Gubbin and S. De Liberato
ACS Photonics 5, 284 (2017)
arXiv:1707.06585

Virtual photons in the ground state of a dissipative system
S. De Liberato
Nature Communications 8, 1465 (2017)
arXiv:1609.04249

Cavity QED Beyond Rotating Wave Approximation: Photon Bunching from the Emission of Individual Dressed Qubits
L. Garziano, A. Ridolfo, S. De Liberato, and S. Savasta
ACS Photonics 4, 2345 (2017)
arXiv:1702.00532

Superradiance with local phase-breaking effects
N. Shammah, N. Lambert, F. Nori, S. De Liberato
Phys. Rev. A 96, 023863 (2017)
arXiv:1704.07066

Collective optomechanical effects in cavity quantum electrodynamics
E. Cortese, P. Lagoudakis, and S. De Liberato
Phys. Rev. Lett. 119, 43604 (2017)
arXiv:1701.01689

Experimental Verification of the Very Strong Coupling Regime in a GaAs Quantum Well Microcavity
S. Brodbeck, S. De Liberato, M. Amthor, M. Klaas, M. Kamp, L. Worschech, C. Schneider, and S. Höfling
Phys. Rev. Lett. 119, 027401 (2017)
arXiv:1704.04658

Theory of nonlinear polaritonics: χ(2) scattering on a β-SiC surface
C. Gubbin and S. De Liberato
ACS Photonics 4, 1381 (2017)
arXiv:1701.06729

Theoretical Investigation of Phonon Polaritons in SiC Micropillar Resonators
C. Gubbin, S. A. Maier, and S. De Liberato
Phys. Rev. B 95, 035313 (2017)
arXiv:1607.05741

Bosonic cascades of indirect excitons
A. V. Nalitov, S. De Liberato, P. Lagoudakis, P. G. Savvidis, and A. V. Kavokin
Superlattice. Microst. 108, 27 (2017)

Real-space Hopfield diagonalization of inhomogeneous dispersive media
C. Gubbin, S. A. Maier, and S. De Liberato
Phys. Rev. B 94, 205301 (2016)
arXiv:1605.01975

Strong and coherent coupling between localised and propagating phonon polaritons
C. Gubbin, F. Martini, A. Politi, S. A. Maier, and S. De Liberato
Phys. Rev. Lett. 116, 246402 (2016)
arXiv:1509.09074

Ground State Electroluminescence
M. Cirio, S. De Liberato, N. Lambert, and F. Nori
Phys. Rev. Lett. 116, 113601 (2016)
arXiv:1508.05849

Self-consistent molecular adaptation induced by strong coupling
J. A. Cwik, P. Kirton, S. De Liberato, and J. Keeling
Phys. Rev. A 93, 033840 (2016)
arXiv:1506.08974

Quantum statistics of bosonic cascades
T. C. H. Liew, Y. G. Rubo, A. S. Sheremet, S. De Liberato, I. A. Shelykh, F. P. Laussy, and A. V. Kavokin
New J. Phys. 18, 023041 (2016)
arXiv:1506.06873

Theory of intersubband resonance fluorescence
N. Shammah and S. De Liberato
Phys. Rev. B 92, 201402(R) (2015)
arXiv:1506.07972

Light-matter decoupling and A² term detection in superconducting circuits
J. J. García-Ripoll, B. Peropadre, and S. De Liberato
Sci. Rep. 5, 16055 (2015)
arXiv:1410.7785

Perspectives for gapped bilayer graphene polaritonics
S. De Liberato
Phys. Rev. B 92, 125433 (2015)
arXiv:1507.03529

Generation of Rabi frequency radiation using exciton-polaritons
F. Barachati, S. De Liberato, and S. Kéna-Cohen
Phys. Rev. A 92, 033828 (2015)
arXiv:1506.07384

Quantum control and long-range quantum correlations in dynamical Casimir arrays
R. Stassi, S. De Liberato, L. Garziano, B. Spagnolo, and S. Savasta
Phys. Rev. A 92, 013830 (2015)
arXiv:1501.07536

Terahertz emission from AC Stark-split asymmetric intersubband transitions
N. Shammah, C. C. Phillips, and S. De Liberato
Phys. Rev. B 89, 235309 (2014)
arXiv:1404.2326

Light-matter decoupling in the deep strong coupling regime: The breakdown of the Purcell effect
S. De Liberato
Phys. Rev. Lett. 112, 016401 (2014)
arXiv:1308.2812

Comment on “System-environment coupling derived by Maxwell’s boundary
conditions from the weak to the ultrastrong light-matter coupling regime” 
S. De Liberato
Phys. Rev. A 89, 017801 (2014)
arXiv:1307.5615

Radical-pair model of magnetoreception with spin–orbit coupling
N. Lambert, S. De Liberato, C. Emary, and F. Nori
New J. Phys. 15, 083024 (2013)
arXiv:1309.5882

Many-body physics of intersubband polaritons
L. Nguyen-Thê, S. De Liberato, M. Bamba, and C. Ciuti
Phys. Rev. B 87, 235322 (2013)
arXiv:1211.5039

Ultrastrong light-matter coupling at terahertz frequencies with split ring resonators and inter-Landau level transitions
G. Scalari, C. Maissen, D. Hagenmüller, S. De Liberato, C. Ciuti, C. Reichl, W. Wegscheider, D. Schuh, M. Beck, and J. Faist
J. Appl. Phys. 113, 136510 (2013)

Terahertz lasing from intersubband polariton-polariton scattering in asymmetric quantum wells
S. De Liberato, C. Ciuti, and C. C. Phillips
Phys. Rev. B 87, 241304(R) (2013)
arXiv:1204.4053

Quantum phases of a multimode bosonic field coupled to flat electronic bands
S. De Liberato and C. Ciuti
Phys. Rev. Lett. 110, 133603 (2013)
arXiv:1209.5273

Ultra-Strong coupling of the cyclotron transition of a two-dimensional electron gas in a THz metamaterial
G. Scalari, C. Maissen, D. Turcinková, D. Hagenmüller, S. De Liberato, C. Ciuti, D. Schuh, C. Reichl, W. Wegscheider, M. Beck, and J. Faist
Science 335, 1323 (2012)
arXiv:1111.2486

Quantum theory of intersubband polarons
S. De Liberato and C. Ciuti
Phys. Rev. B 85, 125302 (2012)
arXiv:1111.5916

Back-action effects in an all-optical model of dynamical Casimir emission
I. Carusotto, S. De Liberato, D. Gerace, and C. Ciuti
Phys. Rev. A 85, 023805 (2012)
arXiv:1107.0445

Carnot’s theorem for nonthermal stationary reservoirs
S. De Liberato and M. Ueda
Phys. Rev. E 84, 051122 (2011)
arXiv:1007.0335

Quantum limit of photothermal cooling
S. De Liberato, N. Lambert, and F. Nori
Phys. Rev. A 83, 033809 (2011)
arXiv:1011.6295

Quantum Szilard Engine
S. W. Kim, T. Sagawa, S. De Liberato, and M. Ueda
Phys. Rev. Lett. 106, 070401 (2011)
arXiv:1006.1471
Viewpoint

Switching ultrastrong light-matter coupling on a subcycle scale
R. Huber, A. A. Anappara, G. Guenter, A. Sell, A, S. De Liberato, C. Ciuti, G. Biasiol, L. Sorba, A. Tredicucci, and A. Leitenstorfer
J. App. Phys. 109, 102418 (2011)

Ultrastrong Light-Matter Coupling Regime with Polariton Dots
Y. Todorov, A. M. Andrews, R. Colombelli, S. De Liberato, C. Ciuti, P. Klang, G. Strasser, and C. Sirtori
Phys. Rev. Lett. 105, 196402 (2010)
arXiv:1301.1297

Ultrastrong coupling between a cavity resonator and the cyclotron transition of a two-dimensional electron gas in the case of an integer filling factor
D. Hagenmüller, S. De Liberato, and C. Ciuti
Phys. Rev. B 81, 235303 (2010)
arXiv:1006.1471

Extracavity quantum vacuum radiation from a single qubit
S. De Liberato, D. Gerace, I. Carusotto, and C. Ciuti
Phys. Rev. A 80, 053810 (2009)
arXiv:0906.2706

Fermionized photons in an array of driven dissipative nonlinear cavities
I. Carusotto, D. Gerace, H. Tureci, S. De Liberato, C. Ciuti, and A. Imamoglu
Phys. Rev. Lett. 103, 033601 (2009)
arXiv:0812.4195

Signatures of light-matter excitations in the ultra-strong coupling regime
A. A. Anappara, S. De Liberato, A. Tredicucci, C. Ciuti, G. Biasiol, L. Sorba, and F. Beltram
Phys. Rev. B 79, 201303(R) (2009)
arXiv:0808.3720

Stimulated scattering and lasing of intersubband cavity polaritons
S. De Liberato and C. Ciuti
Phys. Rev. Lett. 102, 136403 (2009)
arXiv:0806.1691

Sub-cycle switch-on of ultrastrong light-matter interaction
G. Guenter, A. A. Anappara, J. Hees, G. Biasiol, L. Sorba, S. De Liberato, C. Ciuti,  A. Tredicucci, A. Leitenstorfer, and R. Hubert
Nature 458, 178 (2009)
News & Views

Quantum theory of electron tunneling into intersubband cavity polariton states
S. De Liberato and C. Ciuti
Phys. Rev. B 79, 075317 (2009)
arXiv:0802.4091

Optical properties of atomic Mott insulators: from slow light to the dynamical Casimir effects
I. Carusotto, M. Antezza, F. Bariani, S. De Liberato, and C. Ciuti
Phys. Rev. A 77, 063621 (2008)
arXiv:0711.3105

Quantum model of microcavity intersubband electroluminescent devices
S. De Liberato and C. Ciuti
Phys. Rev. B 77, 155321 (2008)
arXiv:0711.3146

Cavity polaritons from excited-subband transitions
A. Anappara, A. Tredicucci, F. Beltram, G. Biasiol, L. Sorba, S. De Liberato, and C. Ciuti
Appl. Phys. Lett. 91, 231118 (2007)

Observing the evolution of a quantum system that does not evolve
S. De Liberato
Phys. Rev. A 76, 042107 (2007)
arXiv:0705.2393
News & Views

Quantum vacuum radiation spectra from a semiconductor microcavity with a time-modulated vacuum Rabi frequency
S. De Liberato, C. Ciuti, and I. Carusotto
Phys. Rev. Lett. 98, 103602 (2007)
arXiv:cond-mat/0611282

Tunnelling dynamics of Bose-Einstein condensate in a four wells loop shaped system
S. De Liberato and C. J. Foot
Phys. Rev. A 73, 035602 (2006)
arXiv:quant-ph/0702270

Conference proceedings

Terahertz emission from asymmetric, doped quantum wells under resonant pumping
N. Shammah, C. C. Phillips, and S. De Liberato
J. Phys. Conf. Ser. 619, 012021 (2015)

Inter-branch terahertz lasing in asymmetric intersubband polariton systems
S. De Liberato, C. Ciuti, and C. C. Phillips
Proc. International Conference on the Physics of Semiconductors (2012)
AIP Conf. Proc. 1566, 459 (2013)

Ultrastrong coupling of integer Landau Level Polaritons
D. Hagenmüller, S. De Liberato, and C. Ciuti
Proc. International Conference on the Physics of Semiconductors (2010)
AIP Conf. Proc. 1399, 457 (2011)

Terahertz Quantum Optics with Solid-state Systems
A. Leitenstorfer, R. Huber, A. A. Sell, A. A. Anappara, G. Guenter, S. Leinss, K. Von Volkmann, T. Kampfrath, M. Wolf, S. De Liberato, C. Ciuti, G. Biasiol, L. Sorba, and A. Tredicucci
Proc. 35th International Conference on Infrared, Millimeter, and Terahertz Waves (2010)

How fast electrons and photons mix: sub-cycle switching of intersubband cavity polaritons
R. Huber, A. A. Anappara, G. Guenter, A. Sell, A, G. Biasiol, L. Sorba, A. Tredicucci, S. De Liberato, C. Ciuti, and A. Leitenstorfer
J. Phys. Conf. Ser. 193, 012060 (2009)

Book chapters

Towards Intersubband Polaritonics: How Fast Can Light and Electrons Mate?
A. A. Anappara, L. Sorba, A. Tredicucci, G. Günter, A. Sell, A. Leitenstorfer, R. Huber, S. De Liberato, C. Ciuti, and G. Biasiol
In S. Luryi, J. Xu, and A. Zaslavsky, (eds) (2010) Future Trends in Microelectronics: From Nanophotonics to Sensors and Energy,
John Wiley & Sons, Inc., Hoboken, NJ, USA.

Patents

High Efficiency Hybrid Strongly Coupled Longitudinal-Transverse Phonon Polaritons
S. De Liberato
Patent GB1812285.3

Device for aiding the management of visualization objects
C. Chanal and S. De Liberato
Patent WO 2014027155 A1

Other publications

Lasing from dressed dots
S. De Liberato
Nature Photonics 12, 4 (2017)

Cervellone da record
N. Shammah and S. De Liberato
Il Sole 24 ore, 15/05/2013

PhD Thesis

Cavity Quantum Electrodynamics and Intersubband Polaritonics of a Two Dimensional Electron Gas
S. De Liberato
Available here