Abstract

Strong optical pulses at mid-infrared and terahertz frequencies have recently emerged as powerful tools to manipulate and control the solid state and especially complex condensed matter systems with strongly correlated electrons. The recent developments in high-power sources in the 0.1–30 THz frequency range, both from table-top laser systems and from free-electron lasers, have provided access to excitations of molecules and solids, which can be stimulated at their resonance frequencies. Amongst these, we discuss free electrons in metals, superconducting gaps and Josephson plasmons in layered superconductors, and vibrational modes of the crystal lattice (phonons), as well as magnetic excitations. This review provides an overview and illustrative examples of how intense terahertz transients can be used to resonantly control matter, with particular focus on strongly correlated electron systems and high-temperature superconductors.

© 2016 Optical Society of America

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2016 (5)

R. Mankowsky, M. Först, and A. Cavalleri, “Non-equilibrium control of complex solids by nonlinear phononics,” Rep. Prog. Phys. 79, 064503 (2016).
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M. Mitrano, A. Cantaluppi, D. Nicoletti, S. Kaiser, A. Perucchi, S. Lupi, P. Di Pietro, D. Pontiroli, M. Riccò, S. R. Clark, D. Jaksch, and A. Cavalleri, “Possible light-induced superconductivity in K3C60 at high temperature,” Nature 530, 461–464 (2016).
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B. Green, S. Kovalev, V. Asgekar, G. Geloni, U. Lehnert, T. Golz, M. Kuntzsch, C. Bauer, J. Hauser, J. Voigtlaender, B. Wustmann, I. Koesterke, M. Schwarz, M. Freitag, A. Arnold, J. Teichert, M. Justus, W. Seidel, C. Ilgner, N. Awari, D. Nicoletti, S. Kaiser, Y. Laplace, S. Rajasekaran, L. Zhang, S. Winnerl, H. Schneider, G. Schay, I. Lorincz, A. A. Rauscher, I. Radu, S. Mährlein, T. H. Kim, J. S. Lee, T. Kampfrath, S. Wall, J. Heberle, A. Malnasi-Csizmadia, A. Steiger, A. S. Müller, M. Helm, U. Schramm, T. Cowan, P. Michel, A. Cavalleri, A. S. Fisher, N. Stojanovic, and M. Gensch, “High-field high-repetition-rate sources for the coherent THz control of matter,” Sci. Rep. 6, 22256 (2016).
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T. Cea, C. Castellani, and L. Benfatto, “Nonlinear optical effects and third-harmonic generation in superconductors: Cooper pairs versus Higgs mode contribution,” Phys. Rev. B 93, 180507(R) (2016).
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Y. Laplace, S. Fernandez-Pena, S. Gariglio, J.-M. Triscone, and A. Cavalleri, “Proposed cavity Josephson plasmonics with complex-oxide heterostructures,” Phys. Rev. B 93, 075152 (2016).
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2015 (14)

S. J. Denny, S. R. Clark, Y. Laplace, A. Cavalleri, and D. Jaksch, “Proposed parametric cooling of bilayer cuprate superconductors by terahertz excitation,” Phys. Rev. Lett. 114, 137001 (2015).
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G. L. Dakovski, W.-S. Lee, D. G. Hawthorn, N. Garner, D. Bonn, W. Hardy, R. Liang, M. C. Hoffmann, and J. J. Turner, “Enhanced coherent oscillations in the superconducting state of underdoped YBa2Cu3O6+x induced via ultrafast terahertz excitation,” Phys. Rev. B 91, 220506(R) (2015).
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T. A. Miller, R. W. Chhajlany, L. Tagliacozzo, B. Green, S. Kovalev, D. Prabhakaran, M. Lewenstein, M. Gensch, and S. Wall, “Terahertz field control of in-plane orbital order in La0.5Sr1.5MnO4,” Nat. Commun. 6, 8175 (2015).
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N. Tsuji and H. Aoki, “Theory of Anderson pseudospin resonance with Higgs mode in superconductors,” Phys. Rev. B. 92, 064508 (2015).
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T. Cea, C. Castellani, G. Seibold, and L. Benfatto, “Nonrelativistic dynamics of the amplitude (Higgs) mode in superconductors,” Phys. Rev. Lett. 115, 157002 (2015).
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R. Singla, G. Cotugno, S. Kaiser, M. Först, M. Mitrano, H. Y. Liu, A. Cartella, C. Manzoni, H. Okamoto, T. Hasegawa, S. R. Clark, D. Jaksch, and A. Cavalleri, “THz-frequency modulation of the Hubbard U in an organic Mott insulator,” Phys. Rev. Lett. 115, 187401 (2015).
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M. Först, R. Mankowsky, and A. Cavalleri, “Mode-selective control of the crystal lattice,” Acc. Chem. Res. 48, 380–387 (2015).
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M. Först, A. D. Caviglia, R. Scherwitzl, R. Mankowsky, P. Zubko, V. Khanna, H. Bromberger, S. B. Wilkins, Y.-D. Chuang, W. S. Lee, W. F. Schlotter, J. J. Turner, G. L. Dakovski, M. P. Minitti, J. Robinson, S. R. Clark, D. Jaksch, J.-M. Triscone, J. P. Hill, S. S. Dhesi, and A. Cavalleri, “Spatially resolved ultrafast magnetic dynamics launched at a complex-oxide hetero-interface,” Nat. Mater. 14, 883–888 (2015).
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C. R. Hunt, D. Nicoletti, S. Kaiser, T. Takayama, H. Takagi, and A. Cavalleri, “Two distinct kinetic regimes for the relaxation of light-induced superconductivity in La1.675Eu0.2Sr0.125CuO4,” Phys. Rev. B 91, 020505(R) (2015).
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E. Fradkin, S. A. Kivelson, and J. M. Tranquada, “Theory of intertwined orders in high temperature superconductors,” Rev. Mod. Phys. 87, 457–482 (2015).
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E. Casandruc, D. Nicoletti, S. Rajasekaran, Y. Laplace, V. Khanna, G. D. Gu, J. P. Hill, and A. Cavalleri, “Wavelength-dependent optical enhancement of superconducting interlayer coupling in La1.885Ba0.115CuO4,” Phys. Rev. B 91, 174502 (2015).
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Z. M. Raines, V. Stanev, and V. M. Galitski, “Enhancement of superconductivity via periodic modulation in a three-dimensional model of cuprates,” Phys. Rev. B 91, 184506 (2015).
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R. Mankowsky, M. Först, T. Loew, J. Porras, B. Keimer, and A. Cavalleri, “Coherent modulation of the YBa2Cu3O6+x atomic structure by displacive stimulated ionic Raman scattering,” Phys. Rev. B 91, 094308 (2015).
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R. Höppner, B. Zhu, T. Rexin, A. Cavalleri, and L. Mathey, “Redistribution of phase fluctuations in a periodically driven cuprate superconductor,” Phys. Rev. B 91, 104507 (2015).
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2014 (17)

M. Först, A. Frano, S. Kaiser, R. Mankowsky, C. R. Hunt, J. J. Turner, G. L. Dakovski, M. P. Minitti, J. Robinson, T. Loew, M. Le Tacon, B. Keimer, J. P. Hill, A. Cavalleri, and S. S. Dhesi, “Femtosecond x-rays link melting of charge-density wave correlations and light-enhanced coherent transport in YBa2Cu3O6.6,” Phys. Rev. B 112, 157002 (2014).

D. Nicoletti, E. Casandruc, Y. Laplace, V. Khanna, C. R. Hunt, S. Kaiser, S. S. Dhesi, G. D. Gu, J. P. Hill, and A. Cavalleri, “Optically-induced superconductivity in striped La2−xBaxCuO4 by polarization-selective excitation in the near infrared,” Phys. Rev. B 90, 100503(R) (2014).

E. Uykur, K. Tanaka, T. Masui, S. Miyasaka, and S. Tajima, “Persistence of the superconducting condensate far above the critical temperature of YBa2(Cu, Zn)3Oy revealed by c-axis optical conductivity measurements for several Zn concentrations and carrier doping levels,” Phys. Rev. Lett. 112, 127003 (2014).
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S. Kaiser, C. R. Hunt, D. Nicoletti, W. Hu, I. Gierz, H. Y. Liu, M. Le Tacon, T. Loew, D. Haug, B. Keimer, and A. Cavalleri, “Optically induced coherent transport far above Tc in underdoped YBa2Cu3O6+x,” Phys. Rev. B 89, 184516 (2014).
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L. E. Hayward, D. G. Hawthorn, R. G. Melko, and S. Sachdev, “Angular fluctuations of a multicomponent order describe the pseudogap of YBa2Cu3O6+x,” Science 343, 1336–1339 (2014).
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P. A. Lee, “Amperean pairing and the pseudogap phase of cuprate superconductors,” Phys. Rev. X 4, 031017 (2014).

V. Thampy, M. P. M. Dean, N. B. Christensen, Z. Islam, M. Oda, M. Ido, N. Momono, S. B. Wilkins, and J. P. Hill, “Rotated stripe order and its competition with superconductivity in La1.88Sr0.12CuO4,” Phys. Rev. B 90, 100510(R) (2014).
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R. Matsunaga, N. Tsuji, H. Fujita, A. Sugioka, K. Makise, Y. Uzawa, H. Terai, Z. Wang, H. Aoki, and R. Shimano, “Light-induced collective pseudospin precession resonating with Higgs mode in a superconductor,” Science 345, 1145–1149 (2014).
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M. Först, R. I. Tobey, H. Bromberger, S. B. Wilkins, V. Khanna, A. D. Caviglia, Y.-D. Chuang, W. S. Lee, W. F. Schlotter, J. J. Turner, M. P. Minitti, O. Krupin, Z. J. Xu, J. S. Wen, G. D. Gu, S. S. Dhesi, A. Cavalleri, and J. P. Hill, “Melting of charge stripes in vibrationally driven La1.875Ba0.125CuO4: assessing the respective roles of electronic and lattice order in frustrated superconductors,” Phys. Rev. Lett. 112, 157002 (2014).
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W. Hu, S. Kaiser, D. Nicoletti, C. R. Hunt, I. Gierz, M. C. Hoffmann, M. Le Tacon, T. Loew, B. Keimer, and A. Cavalleri, “Optically enhanced coherent transport in YBa2Cu3O6.5 by ultrafast redistribution of interlayer coupling,” Nat. Mater. 13, 705–711 (2014).
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R. Mankowsky, A. Subedi, M. Först, S. O. Mariager, M. Chollet, H. Lemke, J. Robinson, J. Glownia, M. Minitti, A. Frano, M. Fechner, N. A. Spaldin, T. Loew, B. Keimer, A. Georges, and A. Cavalleri, “Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5,” Nature 516, 71–73 (2014).
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S. Kaiser, S. R. Clark, D. Nicoletti, G. Cotugno, R. I. Tobey, N. Dean, S. Lupi, H. Okamoto, T. Hasegawa, D. Jaksch, and A. Cavalleri, “Optical properties of a vibrationally modulated solid state Mott insulator,” Sci. Rep. 4, 3823 (2014).
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A. Subedi, A. Cavalleri, and A. Georges, “Theory of nonlinear phononics for coherent light control of solids,” Phys. Rev. B 89, 220301 (2014).
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O. Schubert, M. Hohenleutner, F. Langer, B. Urbanek, C. Lange, U. Huttner, D. Golde, T. Meier, M. Kira, S. W. Koch, and R. Huber, “Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations,” Nat. Photonics 8, 119–123 (2014).
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T. Kubacka, J. A. Johnson, M. C. Hoffmann, C. Vicario, S. de Jong, P. Beaud, S. Grübel, S.-W. Huang, L. Huber, L. Patthey, Y.-D. Chuang, J. J. Turner, G. L. Dakovski, W.-S. Lee, M. P. Minitti, W. Schlotter, R. G. Moore, C. P. Hauri, S. M. Koohpayeh, V. Scagnoli, G. Ingold, S. L. Johnson, and U. Staub, “Large-amplitude spin dynamics driven by a THz pulse in resonance with an electromagnon,” Science 343, 1333–1336 (2014).
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M. Magnuson, T. Schmitt, V. N. Strocov, J. Schlappa, A. S. Kalabukhov, and L. C. Duda, “Self-doping processes between planes and chains in the metal-to-superconductor transition of YBa2Cu3O6.9,” Sci. Rep. 4, 7017 (2014).
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M. Mitrano, G. Cotugno, S. R. Clark, R. Singla, S. Kaiser, J. Stähler, R. Beyer, M. Dressel, L. Baldassarre, D. Nicoletti, A. Perucchi, T. Hasegawa, H. Okamoto, D. Jaksch, and A. Cavalleri, “Pressure-dependent relaxation in the photoexcited Mott insulator ET-F2TCNQ: influence of hopping and correlations on quasiparticle recombination rates,” Phys. Rev. Lett. 112, 117801 (2014).
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2013 (12)

C. Vicario, C. Ruchert, F. Ardana-Lamas, P. M. Derlet, B. Tudu, J. Luning, and C. P. Hauri, “Off-resonant magnetization dynamics phase-locked to an intense phase-stable terahertz transient,” Nat. Photonics 7, 720–723 (2013).
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B. Mansart, J. Lorenzana, A. Mann, A. Odeh, M. Scarongella, M. Chergui, and F. Carbone, “Coupling of a high-energy excitation to superconducting quasiparticles in a cuprate from coherent charge fluctuation spectroscopy,” Proc. Natl. Acad. Sci. USA 110, 4539–4544 (2013).
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M. Beck, I. Rousseau, M. Klammer, P. Leiderer, M. Mittendorff, S. Winnerl, M. Helm, G. N. Gol’tsman, and J. Demsar, “Transient increase of the energy gap of superconducting NbN thin films excited by resonant narrow-band terahertz pulses,” Phys. Rev. Lett. 110, 267003 (2013).
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J. P. Hinton, J. Koralek, Y. M. Lu, A. Vishwanath, J. Orenstein, D. A. Bonn, W. Hardy, and R. Liang, “New collective mode in YBa2Cu3O6+x observed by time-domain reflectometry,” Phys. Rev. B 88, 060508 (2013).
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R. Singla, A. Simoncig, M. Först, D. Prabhakaran, A. Cavalieri, and A. Cavalleri, “Photoinduced melting of the orbital order in La0.5Sr1.5MnO4 with 4-fs laser pulses,” Phys. Rev. B 88, 075107 (2013).
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J. Liu, M. Kargarian, M. Kareev, B. Gray, P. J. Ryan, A. Cruz, N. Tahir, Y.-D. Chuang, J. Guo, J. M. Rondinelli, J. W. Freeland, G. A. Fiete, and J. Chakhalian, “Heterointerface engineered electronic and magnetic phases of NdNiO3,” Nat. Commun. 4, 2714 (2013).

M. Först, R. Mankowsky, H. Bromberger, D. M. Fritz, H. Lemke, D. Zhu, M. Chollet, Y. Tomioka, Y. Tokura, R. Merlin, J. P. Hill, S. L. Johnson, and A. Cavalleri, “Displacive lattice excitation through nonlinear phononics viewed by femtosecond X-ray diffraction,” Solid State Commun. 169, 24–27 (2013).
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T. Kampfrath, K. Tanaka, and K. A. Nelson, “Resonant and nonresonant control over matter and light by intense terahertz transients,” Nat. Photonics 7, 680–690 (2013).
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R. Matsunaga, Y. I. Hamada, K. Makise, Y. Uzawa, H. Terai, Z. Wang, and R. Shimano, “Higgs amplitude mode in the BCS superconductors Nb1-xTixN induced by terahertz pulse excitation,” Phys. Rev. Lett. 111, 057002 (2013).
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A. Dienst, E. Casandruc, D. Fausti, L. Zhang, M. Eckstein, M. Hoffmann, V. Khanna, N. Dean, M. Gensch, S. Winnerl, W. Seidel, S. Pyon, T. Takayama, H. Takagi, and A. Cavalleri, “Optical excitation of Josephson plasma solitons in a cuprate superconductor,” Nat. Mater. 12, 535–541 (2013).
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A. D. Caviglia, M. Först, R. Scherwitzl, V. Khanna, H. Bromberger, R. Mankowsky, R. Singla, Y.-D. Chuang, W. S. Lee, O. Krupin, W. F. Schlotter, J. J. Turner, G. L. Dakovski, M. P. Minitti, J. Robinson, V. Scagnoli, S. B. Wilkins, S. A. Cavill, M. Gibert, S. Gariglio, P. Zubko, J.-M. Triscone, J. P. Hill, S. S. Dhesi, and A. Cavalleri, “Photoinduced melting of magnetic order in the correlated electron insulator NdNiO3,” Phys. Rev. B 88, 220401 (2013).
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K. Itoh, H. Itoh, M. Naka, S. Saito, I. Hosako, N. Yoneyama, S. Ishihara, T. Sasaki, and S. Iwai, “Collective excitation of an electric dipole on a molecular dimer in an organic dimer-Mott insulator,” Phys. Rev. Lett. 110, 106401 (2013).
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2012 (10)

G. Ghiringhelli, M. Le Tacon, M. Minola, S. Blanco-Canosa, C. Mazzoli, N. B. Brookes, G. M. De Luca, A. Frano, D. G. Hawthorn, F. He, T. Loew, M. Moretti Sala, D. C. Peets, M. Salluzzo, E. Schierle, R. Sutarto, G. A. Sawatzky, E. Weschke, B. Keimer, and L. Braicovich, “Long-range incommensurate charge fluctuations in (Y, Nd)Ba2Cu3O6+x,” Science 337, 821–825 (2012).
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