Abstract
The discovery of high-temperature superconductors (HTS) and associated expectations of application of these materials in ultrafast electronics and optoelectronics has created an urgent need for a comprehensive experimental characterization of time-resolved dynamics of carriers in HTS and their response to pulsed, external optical perturbations. The above goal was accomplished via comprehensive transient photoexcitation measurements of light-induced nonequilibrium phenomena in high-quality, epitaxial YBa2Cu3O7−x (YBCO) thin-film microbridge samples. The photoresponse from < lOOfs-wide laser pulses was measured in the temperature range from 20 K to 80 K, using a subpicosecond electro-optic sampling system. The physical origin of the signal was attributed to the nonequilibrium electron heating effect, in which only electron states are perturbed by laser radiation, while the film phonons remain in thermal equilibrium. From the observed single-picosecond electrical transients, measured in the resistive state, we were able to extract, using the two-temperature model, the characteristic electron thermalization and electron-phonon relaxation time constants to be 0.56 ps and 1.1 ps, respectively. The nonequilibrium kinetic-inductive response was measured in the superconducting state, fitted into both the two-temperature and Rothwarf-Taylor models, and compared to the predictions of s- and d-wave pairing mechanism models. No phonon trapping effect (typical for low-temperature superconductors) was observed in YBCO; thus, the quasiparticle lifetime was given by the quasiparticle recombination time and estimated from the Rothwarf-Taylor equations to be well below lps, and approximately 1.8 ps from the two-temperature model. From the point of view of applications, the single-picosecond intrinsic response of a YBCO superconductor demonstrates that hot-electron HTS photodetectors should exhibit intrinsic bit rates exceeding 300 Gbit/s, making them one of the fastest optoelectronic switches, well suited for digital and communication applications
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References
Pals J.A., Weiss K., van Attekum P.M.T.M., Horstman R.E., Wolter J. (1982) Non-Equilibrium Superconductivity in Homogeneous Thin Films, Phys Repts 89:323 and references therein
Elesin V.F., Kopaev Yu.V. (1981) Superconductors with Excess Quasiparticles, Usp Fiz Nauk 133:259 [Sov Phys-Usp 24:116] and references therein
Testardi L.R. (1971) Destruction of Superconductivity by Laser Light, Phys Rev B 4:2189
Sobolewski R., Butler D.P., Hsiang T.Y., Stancampiano C.V., Mourou G.A. (1986) Dynamics of the Intermediate State in Nonequilibrium Superconductors, Phys Rev B 33:4604
Sergeev A.V., Semenov A.D., Kouminov P., Trifonov V., Goghidze I.G., Karasik B.S., Gol’tsman G.N., Gershenzon E.M. (1994) Transparency of a YBa2Cu3O7-Film/Substrate Interface for Thermal Phonons Measured by Means of Voltage Response to Radiation, Phys Rev B 49:9091
Gershenzon E.M., Gershenzon M.E., Gol’tsman G.N., Semenov A.D., Sergeev A.V. (1984) Nonselective Effect of Electromagnetic Radiation on a Superconducting Film in the Resistive State, Sov Phys-JETP 59:442; Gousev Yu.P., Semenov A.D., Gol’tsman G.N., Sergeev A.V., Gershenzon E.M. (1994) Electron-Phonon Interaction in Disordered NbN Films, Physica B 194–196:1355
Chwalek J.M., Uher C, Whitaker J.F., Mourou G.A., Agostinelli J., Lelental M. (1990) Femtosecond Optical Absorption Studies of Nonequilibrium Electronic Processes in High Tc Superconductors, Appl Phys Lett 57:1696
Reitze D.H., Weiner A.M., Inam A., Etemad S. (1992) Fermi-Level Dependence of Femtosecond Response in Nonequilibrium High-Tc Superconductors, Phys Rev B 46:14309
Gong T., Zheng L.X., Xiong W., Kula W., Kostoulas Y., Sobolewski R., Fauchet P.M. (1993) Femtosecond Optical Response of Y-Ba-Cu-0 Thin Films: The Dependence on Optical Frequency, Excitation Intensity, and Electric Current, Phys Rev B 47:14495
Shi L., Gong T., Xiong W., Weng X., Kostoulas Y., Sobolewski R., Fauchet P.M. (1994) Femtosecond Reflectivity of 60K Y-Ba-Cu-0 Thin Films, Appl Phys Lett 64:1150
Sobolewski R., Shi L., Gong T., Xiong W., Weng X., Kostoulas Y., Fauchet P.M. (1994) Femtosecond Optical Response of Y-Ba-Cu-0 Films and Their Applications in Optoelectronics. In: Nahum M., Villegier J.-C. (Eds.) High-Temperature Superconducting Detectors: Bolometric and Nonbolometric, Proc SPIE 2159:110
Xiong W. (1995) Fabrication and Optoelectronic Properties of Y-Ba-Cu-0 Thin Films with Different Oxygen Content, Ph D Thesis, University of Rochester
Stevens C.J., Smith D., Chen C, Ryan J.F., Podobnik B., Mihailovic D., Wagner G.A., Evetts J.E. (1997) Evidence for Two-Component High-Temperature Superconductivity in the Femtosecond Optical Response of YBa2Cu307-i, Phys Rev Lett 78:2212
Eesley G.L. (1986) Generation of Nonequilibrium Electron and Lattice Temperatures in Copper by Picosecond Laser Pulses, Phys Rev B 33:2144
Elsayed-Ali H.E., Norris T.B., Pessot M.A., Mourou G.A. (1987) Time-Resolved Observation of Electron-Phonon Relaxation in Copper, Phys Rev Lett 58:1212
Schoenlein R.W., Lin W.Z., Fujimoto J.G., Easley G.L. (1987) Femtosecond Studies of Nonequilibrium Electronic Processes in Metals, Phys Rev Lett 58:1680
Kabanov V.V., Demsar J., Podobnik B., Mihailovic D. (1999) Quasiparticle Relaxation Dynamics in Superconductors with Different Gap Structures: Theory and Experiments on YBa2Cu3O7-,s, Phys Rev B 59:1497–1506
Semenov A.D., Nebosis R.S., Gousev Yu.P., Heusinger M.A., Renk K.F. (1995) Analysis of the Nonequilibrium Photoresponse of Superconducting Films to Pulsed Radiation by Use of a Two-Temperature Model, Phys Rev B 52:581
Heusinger M.A., Semenov A.D., Gousev Y.P., Kus O., Renk K.F. (1995) Temperature Dependence of the Photoresponse of Superconducting Kinetic Inductance Detectors. In: Dew-Hughes D. (Ed.) Applied Superconductivity, IOP Conf Ser No 148(v 2):749–752
Semenov A.D., Heusinger M.A., Hoffmann J.H., Renk K.F. (1996) Autocorrelation Study of Quasiparticle Relaxation in a YBa2Cu3O7-x Film, J Low Temp Phys 105:305
See, e.g.: Richards P.L. (1994) Bolometers for Infrared and Millimeter Waves, J Appl Phys 76:1
Frenkel A., Sam M.A., Venkatesan T., Chinlon Lin, Wu X.D., Inam A. (1989) Observations of Fast Nonbolometric Optical Response of Nongranular High-Tc YBa2Cu307-a; Superconducting Thin Films, Appl Phys Lett 54:1594
Kwok H.S., Zheng J.P., Ying Q.Y., Rao R. (1989) Nonthermal Optical Response of Y-Ba-Cu-0 Thin Films, Appl Phys Lett 54:2473
Hegmann F.A., Preston J.S. (1993) Origin of the Fast Photoresponse of Epitaxial YBa2Cu307-x Thin Films, Phys Rev B 48:16023
Carr G.L., Quijada M., Tanner D.B., Hirschmugl C.J., Williams G.P., Etemad S., Dutta B., DeRosa F., Inam A., Venkatesan T., Xi X. (1990) Fast Bolometric Response by High-Tc Detectors Measured with Subnanosecond Synchrotron Radiation, Appl Phys Lett 57:2725
Bluzer N. (1991) Temporal Relaxation of Nonequilibrium in Y-Ba-Cu-O Measured from Transient Photoimpedance Response, Phys Rev B 44:10 222
Ghis A., Villegier J.C., Pfister S., Nail M., Gibert P. (1993) Electrical Picosecond Measurements of the Photoresponse in YBa2Cu3O7-s, Appl Phys Lett 63:551
Hegmann F.A., Hughes R.A., Preston J.S. (1994) Picosecond Photoresponse of Epitaxial YBa2Cu307-x Thin Films, Appl Phys Lett 64:3172
Donaldson W.R., Kadin A.M., Ballentine P.H., Sobolewski R. (1989) Interaction of Picosecond Optical Pulses with High Tc Superconducting Films, Appl Phys Lett 54:2470
Johnson M. (1991) Nonbolometric Photoresponse of YBa2Cu3O7-x Films, Appl Phys Lett 59:1371
Hegmann F.A., Jacobs-Perkins D., Wang C.-C, Moffat S.H., Hughes R.A., Preston J.S., Currie M., Fauchet P.M., Hsiang T.Y., Sobolewski R. (1995) Electro-Optic Sampling of 1.5 ps Photoresponse Signal from YBa2Cu3O7-x Thin Films, Appl Phys Lett 67:285
Lindgren M., Currie M., Williams C.A., Hsiang T.Y., Fauchet P.M., Sobolewski R., Moffat S.H., Hughes R.A., Preston J.S., Hegmann F.A. (1997) Ultrafast Photoresponse in Microbridges and Pulse Propagation in Transmission Lines Made from High-Tc Superconducting Y-Ba-Cu-0 Thin Films, J Select Topics Quant Electron 2:668
Lindgren M., Currie M., Williams C, Hsiang T.Y., Fauchet P.M., Sobolewski R., Moffat S.H., Hughes R.A., Preston J.S., Hegmann F.A. (1999) Intrinsic Picosecond Response Times of Y-Ba-Cu-0 Superconducting Photodetectors, Appl Phys Lett 74:853–855
Sobolewski R. (1999) Ultrafast Dynamics of Nonequilibrium Quasiparticles in High-Temperature Superconductors. In: Pavuna D., Bozovic I. (Eds.) Superconducting and Related Oxides, Physics and Nanoengineering III Proc SPIE 3481:480–491
Sobolewski R. (1992) Prospects for High-Tc Superconducting Optoelectronics. In: Superconductivity and Its Applications, AIP Conf Proc 251:659–670; — (1991) Application of High-Tc Superconductors in Optoelectronics. In: Singer S. (Ed.) Infrared and Optoelectronic Materials and Devices, Proc SPIE 1501:14-17
Il’in K.S., Lindgren M., Currie M., Sobolewski R., Cherednichenko S.I., Gol’tsman G.N., Gershenzon E.M. (1999) Picosecond Response and Gigahertz Bandwidth Characterization of Superconducting NbN Hot-Electron Photodetectors, Appl Phys Lett: to be published
Chi C.C., Loy M.M.T., Cronemeyer D.C. (1981) Transient Responses of Superconducting Lead Films Measured with Picosecond Laser Pulses, Phys Rev B 23:124
Il’in K.S., Milostnaya I.I., Verevkin A.A., Gol’tsman G.N., Gershenzon E.M., Sobolewski R. (1998) Ultimate Quantum Efficiency of a Superconducting Hot-Electron Photodetector, Appl Phys Lett 73:3938
Quinlan S.M., Scalapino D.J., Bulut N. (1994) Superconducting Quasiparticle Lifetimes Due to Spin-Fluctuation Scattering, Phys Rev B 49:1470
Ambrosch-Draxl C, Abt R. (1995) Anharmonic Properties of High-Tc Cuprates. In: Mihailovic D., Ruani G., Kaldis E., Mueller K.A. (Ed.) World Sci., Singapore
Friedl B., Thomsen C, Cardona M. (1990) Determination of the Superconducting Gap in RBa2Cu3O7-x, Phys Rev Lett 65:915
Semenov A.D. (1999) Physica C to be published
Anisimov S.I., Kapeliovich B.L., Perelman T.L. (1974) Emission of Electrons from the Surface of Metals Induced by Ultrashort Laser Pulses, Zh Eksp Teor Fiz 66:776 [—Sov Phys-JETP 39:375]
Gusev V.E., Wright O.B. (1998) Ultrafast Nonequilibrium Dynamics of Electrons in Metals, Phys Rev B 57:2878
Rothwarf A., Taylor B.N. (1967) Measurement of Recombination Lifetimes in Superconductors, Phys Rev Lett 19:27
Sergeev A.V., Reizer M.Yu. (1996) Photoresponse Mechanisms of Thin Superconducting Films and Superconducting Detectors, Int J Mod Phys 10:635 and references therein
Poulin G.D., Lachapelle J., Moffat S.H., Hegmann F.A., Preston J.S., (1995) Current-Voltage Characteristics of dc Voltage Biased High Temperature Superconducting Microbridges, Appl Phys Lett 66:2576
Phillips N.E., Fisher R.A., Gordon J.E. (1992) The Specific Heat of High-Tc Superconductors. In: Brewer D.F. (Ed.) Progress in Low Temperature Physics vol 13, Ch 5, Elsevier, Amsterdam, 267
Loram J.W., Mirza K.A., Cooper J.R., Liang W.Y. (1993) Electronic Specific Heat of YBaaCusOe+z from 1.8 to 300 K, Phys Rev Lett 71:1740
Semenov A.D., Gousev Y.P., Renk K.F., Voronov B.M., Gol’tsman G.N., Gershenzon E.M., Schwaab G.W., Feinaugle R. (1997) Noise Characteristics of a NbN Hot-Electron Mixer at 2.5 THz, IEEE Trans Appl Supercond 7:3083
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Sobolewski, R. (2000). Quasiparticle Thermalization and Recombination in High-Temperature Superconductors Excited by Femtosecond Optical Pulses. In: Klamut, J., Veal, B.W., Dabrowski, B.M., Klamut, P.W., Kazimierski, M. (eds) New Developments in High Temperature Superconductivity. Lecture Notes in Physics, vol 545. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-46511-1_8
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