[1] BRAUN A, KORN G, LIU X. Self-channeling of high-peak-power femtosecond laser pulses in air[J]. Optics Letters, 20, 73-75(1995).

[2] YUAN S, WANG T J, TERANISHI Y. Humidity measurement in air using filament-induced nitrogen monohydride fluorescence spectroscopy[J]. Applied Physics Letters, 104, 091113(2014).

[3] YUAN S, WANG T J, TERANISHI Y. Lasing action in water vapor induced by ultrashort laser filamentation[J]. Applied Physics Letters, 102, 224102(2013).

[4] YUAN S, LI M, FENG Y. Filament-induced ultrafast birefringence in gases[J]. Journal of Physics B: Atomic, Molecular and Optical Physics, 48, 094018(2015).

[5] WANG C, FU Y X, ZHOU Z H. Femtosecond filamentation and supercontinuum generation in silver-nanoparticle-doped water[J]. Applied Physics Letters, 90, 181119(2007).

[6] CHIN S L, PETIT S, BORNE F. The white light supercontinuum is indeed an ultrafast white light laser[J]. Japanese Journal of Applied Physics, 38, L126-L128(1999).

[7] GUANDALINI A, ECKLE P, ANSCOMBE M. 5.1 fs pulses generated by filamentation and carrier envelope phase stability analysis[J]. Journal of Physics B: Atomic, Molecular and Optical Physics, 39, S257-S264(2006).

[8] GHOTBI M, TRABS P, BEUTLER M. Generation of high-energy, sub-20-fs pulses in the deep ultraviolet by using spectral broadening during filamentation in argon[J]. Optics Letters, 36, 463-465(2011).

[9] XU H, YUAN S, GUO Z R. Femtosecond red and near-infrared lasers due to cascaded-Raman-assisted four-wave mixing in a nonlinear Yb-doped fiber amplifier[J]. Applied Sciences, 10, 669(2020).

[10] CERULLO G, NISOLI M, STAGIRA S. Sub-8-fs pulses from an ultrabroadband optical parametric amplifier in the visible[J]. Optics Letters, 23, 1283-1285(1998).

[11] [11] BOYD R W. Nonlinear optics[M]. 3rd ed. New Yk: Academic Press, 2008.

[12] WANG L, FAN Y X, YAN Z D. Flat-plateau supercontinuum generation in liquid absorptive medium by femtosecond filamentation[J]. Optics Letters, 35, 2925-2927(2010).

[13] VASA P, SINGH M, BERNARD R. Supercontinuum generation in water doped with gold nanoparticles[J]. Applied Physics Letters, 103, 111109(2013).

[14] LIU F J, YUAN S, HE B Q. Filamentary plasma grating induced by interference of two femtosecond laser pulses in water[J]. Optics Express, 25, 22303-22311(2017).

[15] YUAN S, LIU F J, WANG L R. Highly extended filaments in aqueous gold nano-particle colloidals[J]. Scientific Reports, 8, 5957(2018).

[16] YUAN S, WANG L R, LIU F J. Enhanced nonlinearity for filamentation in gold-nanoparticle-doped water[J]. Chinese Optics Letters, 17, 032601(2019).

[17] CHEN C, ZHANG L, YANG M. Size and distance dependent fluorescence enhancement of nanoporous gold[J]. Optics Express, 25, 9901-9910(2017).

[18] YANG M, ZHANG L, CHEN B. Silver nanoparticles decorated nanoporous gold for surface-enhanced Raman scattering[J]. Nanotechnology, 28, 055301(2017).

[19] HERCHER M. Laser-induced damage in transparent media[J]. Journal of the Optical Society of America, 54, 563-570(1964).

[20] LIU W, PETIT S, BECKER A. Intensity clamping of a femtosecond laser pulse in condensed matter[J]. Optics Communications, 202, 189-197(2002).

[21] [21] CHIN S L, LAMBROPOULOS P. Multiphoton ionization of atoms[M]. New Yk: Academic, 1984.

[22] LIU F J, YUAN S, ZUO Z. Laser filamentation induced bubbles and their motion in water[J]. Optics Express, 24, 13258-13263(2016).

[23] LIU F J, YUAN S, HE B Q. Enhanced stimulated Raman scattering by femtosecond ultraviolet plasma grating in water[J]. Applied Physics Letters, 112, 094101(2018).

[24] YUAN S, CHIN S L, ZENG H P. Femtosecond filamentation induced fluorescence technique for atmospheric sensing[J]. Chinese Physics B, 24, 014208(2015).