[1] Tonouchi M. Cutting-edge terahertz technology[J]. Nature Photonics, 1, 97-105(2007).

[2] Xu J Z, Zhang X C[M]. Terahertz science and technology and its application, 8(2007).

[3] Redo-Sanchez A, Zhang X C. Terahertz science and technology trends[J]. IEEE Journal of Selected Topics in Quantum Electronics, 14, 260-269(2008).

[4] Dhillon S S, Vitiello M S, Linfield E H et al. The 2017 terahertz science and technology roadmap[J]. Journal of Physics D: Applied Physics, 50, 043001(2017).

[5] Fülöp J A, Tzortzakis S, Kampfrath T. Laser-driven strong-field terahertz sources[J]. Advanced Optical Materials, 8, 1900681(2020).

[6] Bergé L, Kaltenecker K, Engelbrecht S et al. Terahertz spectroscopy from air plasmas created by two-color femtosecond laser pulses: the ALTESSE project[J]. EPL (Europhysics Letters), 126, 24001(2019).

[7] Khalatpour A, Paulsen A K, Deimert C et al. High-power portable terahertz laser systems[J]. Nature Photonics, 15, 16-20(2021).

[8] Ropagnol X, Kovács Z, Gilicze B et al. Intense sub-terahertz radiation from wide-bandgap semiconductor based large-aperture photoconductive antennas pumped by UV lasers[J]. New Journal of Physics, 21, 113042(2019).

[9] Zhang B L, Ma Z Z, Ma J L et al. 1.4-mJ high energy terahertz radiation from lithium niobates[J]. Laser & Photonics Reviews, 15, 2000295(2021).

[10] Jolly S W, Matlis N H, Ahr F et al. Spectral phase control of interfering chirped pulses for high-energy narrowband terahertz generation[J]. Nature Communications, 10, 2591(2019).

[11] Liao G Q, Li Y T, Liu H et al. Multi-millijoule coherent terahertz bursts from picosecond laser-irradiated metal foils[J]. Proceedings of the National Academy of Sciences of the United States of America, 116, 3994-3999(2019).

[12] Zhang Z L, Chen Y P, Chen M et al. Controllable terahertz radiation from a linear-dipole array formed by a two-color laser filament in air[J]. Physical Review Letters, 117, 243901(2016).

[13] Zhang Z L, Chen Y P, Cui S et al. Manipulation of polarizations for broadband terahertz waves emitted from laser plasma filaments[J]. Nature Photonics, 12, 554-559(2018).

[14] Zhang L L, Wang W M, Wu T et al. Observation of terahertz radiation via the two-color laser scheme with uncommon frequency ratios[J]. Physical Review Letters, 119, 235001(2017).

[15] Zhao H, Tan Y, Zhang L L et al. Ultrafast hydrogen bond dynamics of liquid water revealed by terahertz-induced transient birefringence[J]. Light: Science & Applications, 9, 136(2020).

[16] Zhang L L, Wang W M, Wu T et al. Strong terahertz radiation from a liquid-water line[J]. Physical Review Applied, 12, 014005(2019).

[17] Koulouklidis A D, Gollner C, Shumakova V et al. Observation of extremely efficient terahertz generation from mid-infrared two-color laser filaments[J]. Nature Communications, 11, 292(2020).

[18] Dey I, Jana K, Fedorov V Y et al. Highly efficient broadband terahertz generation from ultrashort laser filamentation in liquids[J]. Nature Communications, 8, 1184(2017).

[19] Balakin A V, Coutaz J L, Makarov V A et al. Terahertz wave generation from liquid nitrogen[J]. Photonics Research, 7, 678-686(2019).

[20] Zhao J Y, Wang Q N, Hui Y C et al. Traveling-wave antenna model for terahertz radiation from laser-plasma interactions[J]. SciPost Physics Core, 5, 46(2022).

[21] Yu Z Q, Sun L, Zhang N et al. Anti-correlated plasma and THz pulse generation during two-color laser filamentation in air[J]. Ultrafast Science, 2022, 9853053(2022).

[22] Dai J M, Zhang Y F, Chen Y X et al. Research progress on terahertz wave generation from liquid water[J]. Chinese Journal of Lasers, 48, 1914001(2021).

[23] Hui Y C, Zhao J Y. Full current model for terahertz wave generation from femtosecond laser filament under external electric fields[J]. Acta Optica Sinica, 42, 0114002(2022).

[24] Roskos H G, Thomson M D, Kreß M et al. Broadband THz emission from gas plasmas induced by femtosecond optical pulses: from fundamentals to applications[J]. Laser & Photonics Reviews, 1, 349-368(2007).

[25] Clerici M, Peccianti M, Schmidt B E et al. Wavelength scaling of terahertz generation by gas ionization[J]. Physical Review Letters, 110, 253901(2013).

[26] Oh T I, Yoo Y J, You Y S et al. Generation of strong terahertz fields exceeding 8 MV/cm at 1 kHz and real-time beam profiling[J]. Applied Physics Letters, 105, 041103(2014).

[27] Wang T J, Yuan S A, Chen Y P et al. Toward remote high energy terahertz generation[J]. Applied Physics Letters, 97, 111108(2010).

[28] Liu J L, Dai J M, Chin S L et al. Broadband terahertz wave remote sensing using coherent manipulation of fluorescence from asymmetrically ionized gases[J]. Nature Photonics, 4, 627-631(2010).

[29] Hamster H, Sullivan A, Gordon S et al. Subpicosecond, electromagnetic pulses from intense laser-plasma interaction[J]. Physical Review Letters, 71, 2725-2728(1993).

[30] D'Amico C, Houard A, Franco M et al. Conical forward THz emission from femtosecond-laser-beam filamentation in air[J]. Physical Review Letters, 98, 235002(2007).

[31] Amico C D, Houard A, Akturk S et al. Forward THz radiation emission by femtosecond filamentation in gases: theory and experiment[J]. New Journal of Physics, 10, 013015(2008).

[32] Cook D J, Hochstrasser R M. Intense terahertz pulses by four-wave rectification in air[J]. Optics Letters, 25, 1210-1212(2000).

[33] Kim K Y, Glownia J H, Taylor A J et al. Terahertz emission from ultrafast ionizing air in symmetry-broken laser fields[J]. Optics Express, 15, 4577-4584(2007).

[34] Kim K Y, Taylor A J, Glownia J H et al. Coherent control of terahertz supercontinuum generation in ultrafast laser-gas interactions[J]. Nature Photonics, 2, 605-609(2008).

[35] Andreeva V A, Kosareva O G, Panov N A et al. Ultrabroad terahertz spectrum generation from an air-based filament plasma[J]. Physical Review Letters, 116, 063902(2016).

[36] Zhao J Y, Liu W W, Li S C et al. Clue to a thorough understanding of terahertz pulse generation by femtosecond laser filamentation[J]. Photonics Research, 6, 296(2018).

[37] de Alaiza Martínez P G, Babushkin I, Bergé L et al. Boosting terahertz generation in laser-field ionized gases using a sawtooth wave shape[J]. Physical Review Letters, 114, 183901(2015).

[38] Karpowicz N, Zhang X C. Coherent terahertz echo of tunnel ionization in gases[J]. Physical Review Letters, 102, 093001(2009).

[39] You Y S, Oh T I, Kim K Y. Off-axis phase-matched terahertz emission from two-color laser-induced plasma filaments[J]. Physical Review Letters, 109, 183902(2012).

[40] Johnson L A, Palastro J P, Antonsen T M et al. THz generation by optical Cherenkov emission from ionizing two-color laser pulses[J]. Physical Review A, 88, 063804(2013).

[41] Dietze D, Darmo J, Roither S et al. Polarization of terahertz radiation from laser generated plasma filaments[J]. Journal of the Optical Society of America B, 26, 2016-2027(2009).

[42] Chen Y P, Marceau C, Génier S et al. Elliptically polarized terahertz emission through four-wave mixing in a two-color filament in air[J]. Optics Communications, 282, 4283-4287(2009).

[43] You Y S, Oh T I, Kim K Y. Mechanism of elliptically polarized terahertz generation in two-color laser filamentation[J]. Optics Letters, 38, 1034-1036(2013).

[44] Zhang Y Z, Chen Y P, Xu S Q et al. Portraying polarization state of terahertz pulse generated by a two-color laser field in air[J]. Optics Letters, 34, 2841-2843(2009).

[45] Zhao J Y, Zhang Y Z, Zeng T et al. Correlated study of terahertz pulse generation and plasma density during two-color filamentation in air[C], JTu5A.9(2015).

[46] Xu S Q, Zhang Y Z, Zheng Y B et al. Study of physical mechanism of two-color laser field pumped THz wave in air plasma[J]. Terahertz Science and Technology, 3, 130(2010).

[47] Zhang Y Z, Chen Y Y, Marceau C et al. Non-radially polarized THz pulse emitted from femtosecond laser filament in air[J]. Optics Express, 16, 15483-15488(2008).

[48] Chen Y P, Marceau C, Liu W W et al. Elliptically polarized terahertz emission in the forward direction of a femtosecond laser filament in air[J]. Applied Physics Letters, 93, 231116(2008).

[49] Gorodetsky A, Koulouklidis A D, Massaouti M et al. Physics of the conical broadband terahertz emission from two-color laser-induced plasma filaments[J]. Physical Review A, 89, 033838(2014).

[50] Blank V, Thomson M D, Roskos H G. Spatio-spectral characteristics of ultra-broadband THz emission from two-colour photoexcited gas plasmas and their impact for nonlinear spectroscopy[J]. New Journal of Physics, 15, 075023(2013).

[51] Klarskov P, Strikwerda A C, Iwaszczuk K et al. Experimental three-dimensional beam profiling and modeling of a terahertz beam generated from a two-color air plasma[J]. New Journal of Physics, 15, 075012(2013).

[52] Zhong H A, Karpowicz N, Zhang X C. Terahertz emission profile from laser-induced air plasma[J]. Applied Physics Letters, 88, 261103(2006).

[53] Klarskov P, Zalkovskij M, Strikwerda A C et al. Spectrally resolved measurements of the terahertz beam profile generated from a two-color air plasma[C](2014).

[54] Chin S L, Wang T J, Marceau C et al. Advances in intense femtosecond laser filamentation in air[J]. Laser Physics, 22, 1-53(2012).

[55] Couairon A, Mysyrowicz A. Femtosecond filamentation in transparent media[J]. Physics Reports, 441, 47-189(2007).

[56] Zhao J Y, Chu W, Wang Z et al. Strong spatial confinement of terahertz wave inside femtosecond laser filament[J]. ACS Photonics, 3, 2338-2343(2016).

[57] Liu C, Chen Y M, Zhao J Y et al. Plasma micro-cavity of terahertz wave during laser filamentation[J]. IEEE Photonics Journal, 11, 5900714(2019).

[58] Zhao J Y, Zhang X, Li S et al. Detecting the propagation effect of terahertz wave inside the two-color femtosecond laser filament in the air[J]. Applied Physics B, 124, 45(2018).

[59] Zhao J Y, Zhang Y Z, Wang Z et al. Propagation of terahertz wave inside femtosecond laser filament in air[J]. Laser Physics Letters, 11, 095302(2014).

[60] Liu W W, Zhao J Y, Zhang Y Z et al. Research on superluminal propagation of terahertz wave during femtosecond laser filamentation[J]. Infrared and Laser Engineering, 45, 15-21(2016).

[61] Zhao J Y, Chu W, Guo L J et al. Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air[J]. Scientific Reports, 4, 3880(2014).

[62] Takahara J, Yamagishi S, Taki H et al. Guiding of a one-dimensional optical beam with nanometer diameter[J]. Optics Letters, 22, 475-477(1997).

[63] Lu D, Gao H, Zhao J Y et al. Numerical simulation on terahertz wave propagation in plasma channels[J]. Optik, 182, 42-49(2019).

[64] Bozhevolnyi S I[M]. Plasmonic nanoguides and circuits(2008).

[65] Zhao J Y, Guo L J, Chu W et al. Simple method to enhance terahertz radiation from femtosecond laser filament array with a step phase plate[J]. Optics Letters, 40, 3838-3841(2015).

[66] Zhao J Y, Gao H, Li S C et al. Investigating the non-radially polarized component of terahertz wave emission during single-colour femtosecond laser filamentation in air[J]. Journal of Optics, 20, 105502(2018).

[67] Yu Z Q, Su Q, Zhang N et al. THz birefringence inside femtosecond laser filament in air[J]. Optics & Laser Technology, 141, 107179(2021).

[68] Zhao J Y, Liu W W. Two-dimensional terahertz time-domain spectroscopy and its applications[J]. Journal of Electronic Science and Technology, 13, 6-13(2015).

[69] Tang L Z, Zhao J Y, Dong Z H et al. Towards remotely directional transmission of terahertz wave in air: the concept of free-space photonic crystal waveguide[J]. Optics & Laser Technology, 141, 107102(2021).

[70] Gao H, Chu W, Yu G L et al. Femtosecond laser filament array generated with step phase plate in air[J]. Optics Express, 21, 4612-4622(2013).

[71] Panov N A, Kosareva O G, Murtazin I N. Ordered filaments of a femtosecond pulse in the volume of a transparent medium[J]. Journal of Optical Technology, 73, 778-785(2006).

[72] Gao H, Zhao J Y, Liu W W. Control of multiple filamentation induced by ultrafast laser pulses[J]. Optics and Precision Engineering, 21, 598-607(2013).

[73] Lu D, Su Q, Qi P F et al. Method for terahertz radiation enhancement using filament array[J]. Chinese Journal of Lasers, 46, 0614021(2019).

[74] Shipilo D E, Nikolaeva I A, Pushkarev D V et al. Balance of emission from THz sources in DC-biased and unbiased filaments in air[J]. Optics Express, 29, 40687-40698(2021).

[75] Nikolaeva I A, Shipilo D E, Pushkarev D V et al. Flat-top THz directional diagram of a DC-biased filament[J]. Optics Letters, 46, 5497-5500(2021).

[76] Su Q A, Xu Q A, Zhang N et al. Control of terahertz pulse polarization by two crossing DC fields during femtosecond laser filamentation in air[J]. Journal of the Optical Society of America B, 36, G1-G5(2019).

[77] Balistreri G, Tomasino A, Dong J L et al. Time-domain integration of broadband terahertz pulses in a tapered two-wire waveguide[J]. Laser & Photonics Reviews, 15, 2100051(2021).

[78] Zhao J Y. Air-plasma-based all-optical temporal integration of broadband terahertz pulses[EB/OL]. https:∥arxiv.org/abs/2211.06804

[79] Zhao J Y. Observation of the epsilon-near-zero (ENZ) effect inside the laser plasma in air[EB/OL]. https:∥arxiv.org/abs/2211.06796