[1] Ferguson B, Zhang X C. Materials for terahertz science and technology. Nature Materials, 2002, 1(1): 26–33
[2] Siegel P H. Terahertz technology. IEEE Transactions on Microwave Theory and Techniques, 2002, 50(3): 910–928
[3] Tonouchi M. Cutting-edge terahertz technology. Nature Photonics, 2007, 1(2): 97–105
[4] Nuss M, Orenstein J. Terahertz time-domain spectroscopy. In: Gruner G, ed. Millimeter and SubmillimeterWave Spectroscopy of Solids. Berlin/Heidelberg: Springer, 1998, 7–50
[5] Grischkowsky D, Keiding S, Exter M, Fattinger C. Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors. Journal of the Optical Society of America. B, Optical Physics, 1990, 7(10): 2006–2015
[6] Exter M, Fattinger C, Grischkowsky D. Terahertz time-domain spectroscopy of water vapor. Optics Letters, 1989, 14(20): 1128–1130
[7] Yeh K L, HoffmannMC, Hebling J, Nelson K A. Generation of 10 μJ ultrashort terahertz pulses by optical rectification. Applied Physics Letters, 2007, 90(17): 171121
[8] You D, Jones R R, Bucksbaum P H, Dykaar D R. Generation of high-power sub-single-cycle 500-fs electromagnetic pulses. Optics Letters, 1993, 18(4): 290–292
[9] Bartel T, Gaal P, Reimann K, Woerner M, Elsaesser T. Generation of single-cycle THz transients with high electric-field amplitudes. Optics Letters, 2005, 30(20): 2805–2807
[10] Hirori H, Doi A, Blanchard F, Tanaka K. Single-cycle terahertz pulses with amplitudes exceeding 1 MV/cm generated by optical rectification in LiNbO3. Applied Physics Letters, 2011, 98(9): 091106
[11] Sell A, Leitenstorfer A, Huber R. Phase-locked generation and field-resolved detection of widely tunable terahertz pulses with amplitudes exceeding 100 MV/cm. Optics Letters, 2008, 33(23): 2767–2769
[12] Cao J C. Interband impact ionization and nonlinear absorption of terahertz radiation in semiconductor heterostructures. Physical Review Letters, 2003, 91(23): 237401
[13] Gaal P, Reimann K, Woerner M, Elsaesser T, Hey R, Ploog K H. Nonlinear terahertz response of -type GaAs. Physical Review Letters, 2006, 96(18): 187402
[14] Danielson J R, Lee Y S, Prineas J P, Steiner J T, Kira M, Koch S W. Interaction of strong single-cycle terahertz pulses with semiconductor quantum wells. Physical Review Letters, 2007, 99(23): 237401
[15] Shen Y, Watanabe T, Arena D A, Kao C C, Murphy J B, Tsang T Y, Wang X J, Carr G L. Nonlinear cross-phase modulation with intense single-cycle terahertz pulses. Physical Review Letters, 2007, 99(4): 043901
[16] Su F H, Blanchard F, Sharma G, Razzari L, Ayesheshim A, Cocker T L, Titova L V, Ozaki T, Kieffer J C, Morandotti R, Reid M, Hegmann F A. Terahertz pulse induced intervalley scattering in photoexcited GaAs. Optics Express, 2009, 17(12): 9620–9629
[17] Jewariya M, Nagai M, Tanaka K. Ladder climbing on the anharmonic intermolecular potential in an amino acid microcrystal via an intense monocycle terahertz pulse. Physical Review Letters, 2010, 105(20): 203003
[18] Kuehn W, Gaal P, Reimann K, Woerner M, Elsaesser T, Hey R. Coherent ballistic motion of electrons in a periodic potential. Physical Review Letters, 2010, 104(14): 146602
[19] Kampfrath T, Sell A, Klatt G, Pashkin A, Mahrlein S, Dekorsy T, Wolf M, Fiebig M, Leitenstorfer A, Huber R. Coherent terahertz control of antiferromagnetic spin waves. Nature Photonics, 2011, 5(1): 31–34
[20] Leinb S, Kampfrath T, Volkmann K, Wolf M, Steiner J T, Kira M, Koch SW, Leitenstorfer A, Huber R. Terahertz coherent control of optically dark paraexcitons in Cu2O. Physical Review Letters, 2008, 101(24): 246401
[21] Huber R, Tauser F, Brodschelm A, Bichler M, Abstreiter G, Leitenstorfer A. How many-particle interactions develop after ultrafast excitation of an electron-hole plasma. Nature, 2001, 414(6861): 286–289
[22] Kaindl R A, Carnahan M A, Hagele D, Lovenich R, Chemla D S. Ultrafast terahertz probes of transient conducting and insulating phases in an electron-hole gas. Nature, 2003, 423(6941): 734–738
[23] Gunter G, Anappara A A, Hees J, Sell A, Biasiol G, Sorba L, De Liberato S, Ciuti C, Tredicucci A, Leitenstorfer A, Huber R. Subcycle switch-on of ultrastrong light-matter interaction. Nature, 2009, 458(7235): 178–181
[24] Hu B B, Zhang X C, Auston D H, Smith P R. Free-space radiation from electrooptic crystals. Applied Physics Letters, 1990, 56(6): 506–508
[25] Han P Y, Zhang X C. Free-space coherent broadband terahertz time-domain spectroscopy. Measurement Science & Technology, 2001, 12(11): 1747–1756
[26] Huber R, Brodschelm A, Tauser F, Leitenstorfer A. Generation and field-resolved detection of femtosecond electromagnetic pulses tunable up to 41 THz. Applied Physics Letters, 2000, 76(22): 3191–3193
[27] Kubler C, Huber R, Tubel S, Leitenstorfer A. Ultrabroadband detection of multi-terahertz field transients with GaSe electro-optic sensors: approaching the near infrared. Applied Physics Letters, 2004, 85(16): 3360–3362
[28] Auston D H. Picosecond optoelectronic switching and gating in silicon. Applied Physics Letters, 1975, 26(3): 101–103
[29] Mourou G, Stancampiano C V, Antonetti A, Orszag A. Picosecond microwave pulses generated with a subpicosecond laser-driven semiconductor switch. Applied Physics Letters, 1981, 39(4): 295–296
[30] Fattinger C, Grischkowsky D. Point source terahertz optics. Applied Physics Letters, 1988, 53(16): 1480–1482
[31] Krokel D, Grischkowsky D, Ketchen M B. Subpicosecond electrical pulse generation using photoconductive switches with long carrier lifetimes. Applied Physics Letters, 1989, 54(11): 1046–1047
[32] Shen Y C, Upadhya P C, Linfield E H, Beere H E, Davies A G. Ultrabroadband terahertz radiation from low-temperature-grown GaAs photoconductive emitters. Applied Physics Letters, 2003, 83(15): 3117–3119
[33] Fill E, Borgstrom S, Larsson J, Starczewski T, Wahlstrom C G, Svanberg S. XUV spectra of optical-field-ionized plasmas. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 1995, 51(6): 6016–6027
[34] Hamster H, Sullivan A, Gordon S, White W, Falcone R W. Subpicosecond, electromagnetic pulses from intense laser-plasma interaction. Physical Review Letters, 1993, 71(17): 2725–2728
[35] Forestier B, Houard A, Durand M, Andre Y B, Prade B, Dauvignac J Y, Perret F, Pichot C, Pellet M, Mysyrowicz A. Radiofrequency conical emission from femtosecond filaments in air. Applied Physics Letters, 2010, 96(14): 141111
[36] Cook D J, Hochstrasser RM. Intense terahertz pulses by four-wave rectification in air. Optics Letters, 2000, 25(16): 1210–1212
[37] Thomson M D, Blank V, Roskos H G. Terahertz white-light pulses from an air plasma photo-induced by incommensurate two-color optical fields. Optics Express, 2010, 18(22): 23173–23182
[38] Wu Q, Zhang X C. Free-space electro-optics sampling of midinfrared pulses. Applied Physics Letters, 1997, 71(10): 1285–1286
[39] Jepsen P U, Winnewisser C, Schall M, Schyja V, Keiding S R, Helm H. Detection of THz pulses by phase retardation in lithium tantalate. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 1996, 53(4): R3052–R3054
[40] Nahata A, Auston D H, Heinz T F, Wu C. Coherent detection of freely propagating terahertz radiation by electro-optic sampling. Applied Physics Letters, 1996, 68(2): 150–152
[41] Vagelatos N, Wehe D, King J S. Phonon dispersion and phonon densities of states for ZnS and ZnTe. Journal of Chemical Physics, 1974, 60(9): 3613–3618
[42] Kleinman D A, Spitzer W G. Infrared lattice absorption of GaP. Physical Review, 1960, 118(1): 110–117
[43] Gupta S, Frankel M Y, Valdmanis J A, Whitaker J F, Mourou G A, Smith F W, Calawa A R. Subpicosecond carrier lifetime in GaAs grown by molecular beam epitaxy at low temperatures. Applied Physics Letters, 1991, 59(25): 3276–3278
[44] Prabhu S S, Ralph S E, Melloch M R, Harmon E S. Carrier dynamics of low-temperature-grown GaAs observed via THz spectroscopy. Applied Physics Letters, 1997, 70(18): 2419–2421
[45] Kono S, Tani M, Sakai K. Coherent detection of mid-infrared radiation up to 60 THz with an LT-GaAs photoconductive antenna. Iee P-Optoelectron, 2002, 149(3): 105–109
[46] Liu J, Zhang X C. Terahertz-radiation-enhanced emission of fluorescence from gas plasma. Physical Review Letters, 2009, 103(23): 235002
[47] Liu J, Zhang X C. Plasma characterization using terahertz-waveenhanced fluorescence. Applied Physics Letters, 2010, 96(4): 041505
[48] Liu J, Dai J, Chin S L, Zhang X C. Broadband terahertz wave remote sensing using coherent manipulation of fluorescence from asymmetrically ionized gases. Nature Photonics, 2010, 4(9): 627–631
[49] Clough B, Liu J, Zhang X C. Laser-induced photoacoustics influenced by single-cycle terahertz radiation. Optics Letters, 2010, 35(21): 3544–3546
[50] Liu J, Clough B, Zhang X C. Enhancement of photoacoustic emission through terahertz-field-driven electron motions. Physical Review E: Statistical, Nonlinear, and Soft Matter Physics, 2010, 82(6 Pt 2): 066602
[51] Dai J, Xie X, Zhang X C. Detection of broadband terahertz waves with a laser-induced plasma in gases. Physical Review Letters, 2006, 97(10): 103903
[52] Karpowicz N, Dai J, Lu X, Chen Y, Yamaguchi M, Zhao H, Zhang X C, Zhang L, Zhang C, Price-Gallagher M, Fletcher C, Mamer O, Lesimple A, Johnson K. Coherent heterodyne time-domain spectrometry covering the entire “terahertz gap”. Applied Physics Letters, 2008, 92(1): 011131
[53] Nahata A, Heinz T F. Detection of freely propagating terahertz radiation by use of optical second-harmonic generation. Optics Letters, 1998, 23(1): 67–69
[54] Cook D J, Chen J X, Morlino E A, Hochstrasser R M. Terahertzfield-induced second-harmonic generation measurements of liquid dynamics. Chemical Physics Letters, 1999, 309(3–4): 221–228
[55] Lu X, Karpowicz N, Zhang X C. Broadband terahertz detection with selected gases. Journal of the Optical Society of America. B, Optical Physics, 2009, 26(9): A66–A73
[56] Lu X, Zhang X C.Terahertz wave gas photonics: sensing with gases. Journal of Infrared, Millimeter and Terahertz Waves, 2011, 32(5): 562–569
[57] Lu X, Karpowicz N, Chen Y, Zhang X C. Systematic study of broadband terahertz gas sensor. Applied Physics Letters, 2008, 93(26): 261106
[58] Kleinman D A, Ashkin A, Boyd G D. Second-harmonic generation of light by focused laser beams. Physical Review, 1966, 145(1): 338
[59] Ward J F, New G H C. Optical third harmonic generation in gases by a focused laser beam. Physical Review, 1969, 185(1): 5760. Karpowics N. Physics and utilization of terahertz gas photonics. In: Physics. Rensselaer Polytechnic Institute, Troy, NY, 2009, 124 61. Finn R S, Ward J F. DC-induced optical second-harmonic generation in the inert gases. Physical Review Letters, 1971, 26:285–289
[60] Becker A, Akozbek N, Vijayalakshmi K, Oral E, Bowden C M, Chin S L. Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas. Applied Physics. B, Lasers and Optics, 2001, 73(3): 287–290
[61] Shelton D P. Nonlinear-optical susceptibilities of gases measured at 1064 and 1319 nm. Physical Review A, 1990, 42(5): 2578–2592 PMID:9904326
[62] Boyd R W. Nonlinear Optics. Burlington, MA: Academic Press, 2008
[63] Hermann J P, Ducuing J. Third-order polarizabilities of long-chain molecules. Journal of Applied Physics, 1974, 45(11): 5100–5102
[64] Rustagi K C, Ducuing J. Third-order optical polarizability of conjugated organic-molecules. Optics Communications, 1974, 10(3): 258–261
[65] Korff S, Breit G. Optical dispersion. Reviews of Modern Physics, 1932, 4(3): 471–503
[66] Gouy L G. Sur la propagation anomale des ondes. Compt. Rendue Acad. Sci. Paris, 1890, 111: 33
[67] Gouy L G. Sur une propriete nouvelle des ondes lumineuses. C. R. Acad. Sci. Paris, 1890, 110: 1251
[68] Ruffin A B, Rudd J V, Whitaker J F, Feng S, Winful H G. Direct observation of the Gouy phase shift with single-cycle terahertz pulses. Physical Review Letters, 1999, 83(17): 3410–3413
[69] Lide D R, ed. CRC Handbook of Chemistry and Physics. 86th ed. Boca Raton: CRC-Press, 2005
[70] Wu Q, Zhang X C. Free-space electro-optics sampling of midinfrared pulses. Applied Physics Letters, 1997, 71(10): 1285–1286
[71] Naftaly M, Dudley R. Methodologies for determining the dynamic ranges and signal-to-noise ratios of terahertz time-domain spectrometers. Optics Letters, 2009, 34(8): 1213–1215
[72] Bigio I J, Ward J F. Measurement of the hyperpolarizability ratio χyyyy( – 2ω; 0, ω, ω)/χyyxx( – 2ω; 0, ω, ω) for the inert gases. Physical Review A, 1974, 9(1): 35–39
[73] Ward J F, Bigio I J. Molecular second- and third-order polarizabilities from measurements of second-harmonic generation in gases. Physical Review A, 1975, 11(1): 60–66
[74] Ward J F, Miller C K. Measurements of nonlinear optical polarizabilities for twelve small molecules. Physical Review A, 1979, 19(2): 826–833
[75] Xie X, Dai J, Zhang X C. Coherent control of THz wave generation in ambient air. Physical Review Letters, 2006, 96(7): 075005
[76] Kim K Y, Glownia J H, Taylor A J, Rodriguez G. Terahertz emission from ultrafast ionizing air in symmetry-broken laser fields. Optics Express, 2007, 15(8): 4577–4584
[77] Kim K Y, Taylor A J, Glownia J H, Rodriguez G. Coherent control of terahertz supercontinuum generation in ultrafast laser-gas interactions. Nature Photonics, 2008, 2(10): 605–609
[78] Karpowicz N, Zhang X C. Coherent terahertz echo of tunnel ionization in gases. Physical Review Letters, 2009, 102(9): 093001
[79] Silaev A A, Vvedenskii N V. Residual-current excitation in plasmas produced by few-cycle laser pulses. Physical Review Letters, 2009, 102(11): 115005
[80] Kreb M, Loffler T, Thomson M D, Dorner R, Gimpel H, Zrost K, Ergler T, Moshammer R, Morgner U, Ullrich J, Roskos H G. Determination of the carrier-envelope phase of few-cycle laser pulses with terahertz-emission spectroscopy. Nature Physics, 2006, 2(5): 327–331
[81] Jones D J, Diddams S A, Ranka J K, Stentz A,Windeler R S, Hall J L, Cundiff S T. Carrier-envelope phase control of femtosecond mode-locked lasers and direct optical frequency synthesis. Science, 2000, 288(5466): 635–639
[82] Paulus G G, Grasbon F,Walther H, Villoresi P, Nisoli M, Stagira S, Priori E, De Silvestri S. Absolute-phase phenomena in photoionization with few-cycle laser pulses. Nature, 2001, 414(6860): 182–184
[83] Ferrari F, Calegari F, Lucchini M, Vozzi C, Stagira S, Sansone G, Nisoli M. High-energy isolated attosecond pulses generated by above-saturation few-cycle fields. Nature Photonics, 2010, 4(12): 875–879
[84] Paul PM, Toma E S, Breger P, Mullot G, Auge F, Balcou P, Muller H G, Agostini P. Observation of a train of attosecond pulses from high harmonic generation. Science, 2001, 292(5522): 1689–1692
[85] Strickland D, Mourou G. Compression of amplified chirped optical pulses. Optics Communications, 1985, 56(3): 219–221
[86] Nisoli M, De Silvestri S, Svelto O. Generation of high energy 10 fs pulses by a new pulse compression technique. Applied Physics Letters, 1996, 68(20): 2793–2795
[87] Nisoli M, De Silvestri S, Svelto O, Szipocs R, Ferencz K, Spielmann C, Sartania S, Krausz F. Compression of high-energy laser pulses below 5 fs. Optics Letters, 1997, 22(8): 522–524
[88] Matsubara E, Yamane K, Sekikawa T, Yamashita M. Generation of 2.6 fs optical pulses using induced-phase modulation in a gas-filled hollow fiber. Journal of the Optical Society of America. B, Optical Physics, 2007, 24(4): 985–989
[89] Hauri C P, Kornelis W, Helbing F W, Heinrich A, Couairon A, Mysyrowicz A, Biegert J, Keller U. Generation of intense, carrierenvelope phase-locked few-cycle laser pulses through filamentation. Applied Physics. B, Lasers and Optics, 2004, 79(6): 673–677
[90] Couairon A, Franco M, Mysyrowicz A, Biegert J, Keller U. Pulse self-compression to the single-cycle limit by filamentation in a gas with a pressure gradient. Optics Letters, 2005, 30(19): 2657–2659
[91] Kane D J, Trebino R. Single-shot measurement of the intensity and phase of an arbitrary ultrashort pulse by using frequency-resolved optical gating. Optics Letters, 1993, 18(10): 823–825
[92] Johnson F A. Lattice absorption bands in silicon. Proceedings of the Physical Society, London, 1959, 73(2): 265–272
[93] Shan J, Dadap J I, Heinz T F. Circularly polarized light in the single-cycle limit: The nature of highly polychromatic radiation of defined polarization. Optics Express, 2009, 17(9): 7431–7439
[94] Loffler T, Jacob F, Roskos H G. Generation of terahertz pulses by photoionization of electrically biased air. Applied Physics Letters, 2000, 77(3): 453–455
[95] Roskos H G, Thomson M D, Kreb M, Loffler T. Broadband THz emission from gas plasmas induced by femtosecond optical pulses: from fundamentals to applications. Laser Photonics Rev, 2007, 1(4): 349–368
[96] Houard A, Liu Y, Prade B, Tikhonchuk V T, Mysyrowicz A. Strong enhancement of terahertz radiation from laser filaments in air by a static electric field. Physical Review Letters, 2008, 100(25): 255006
[97] Blanchard F, Sharma G, Ropagnol X, Razzari L, Morandotti R, Ozaki T. Improved terahertz two-color plasma sources pumped by high intensity laser beam. Optics Express, 2009, 17(8): 6044–6052
[98] Babushkin I, Kuehn W, Kohler C, Skupin S, Berge L, Reimann K, Woerner M, Herrmann J, Elsaesser T. Ultrafast spatiotemporal dynamics of terahertz generation by ionizing two-color femtosecond pulses in gases. Physical Review Letters, 2010, 105(5): 053903
[99] Liu Y, Houard A, Prade B, Mysyrowicz A, Diaw A, Tikhonchuk V T. Amplification of transition-Cherenkov terahertz radiation of femtosecond filament in air. Applied Physics Letters, 2008, 93(5): 051108
[100] Chen Y P, Wang T J, Marceau C, Theberge F, Chateauneuf M, Dubois J, Kosareva O, Chin S L. Characterization of terahertz emission from a dc-biased filament in air. Applied Physics Letters, 2009, 95: 101101
[101] Dai J, Karpowicz N, Zhang X C. Coherent polarization control of terahertz waves generated from two-color laser-induced gas plasma. Physical Review Letters, 2009, 103(2): 023001
[102] Wen H D, Lindenberg AM. Coherent terahertz polarization control through manipulation of electron trajectories. Physical Review Letters, 2009, 103(2): 023902
