一维单壁碳纳米管相干结构振荡的光谱学调制
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摘要
采用3.7fs脉冲激光对半导体单壁碳纳米管的两个最低电子跃迁进行选择性抽运,诱导产生了沿碳管径向振荡的低频呼吸模式(RBM)和沿轴向振荡的高频伸缩模式(GM)。通过变换抽运光带宽,探测到最低单激发态抽运和双激发态抽运对两种声子振幅及初始相位的影响。研究结果表明,RBM和GM的振幅以及GM的初始相位得到了明显调制。基于相干电-声子耦合对声子场的影响,调制了碳纳米管晶格结构振荡模式的参量。提供了一种通过激发电子相干运动调控相干晶格振荡特性的可能性。
A 3.7 fs pulsed laser is used to selectively pump the two lowest electronic transitions of semiconducting single-walled carbon nanotubes,which induces a low-frequency oscillation radial breathing mode(RBM)and a highfrequency oscillation axis stretching mode(GM)along the carbon tubes.By changing the pump bandwidth,the pump effects of the lowest single-excited-state and dual-excited-state on the amplitudes and initial phases of the two vibrational modes are detected.The research result indicates that the amplitudes of RBM and GM,as well as the initial phase of GM,are obviously modulated.With the influence of coherent electro-phonon coupling on phonon field,the parameters of the vibrational modes of the carbon nanotubes lattice structure are modulated.This provides apossibility to regulate the coherent lattice vibration properties by inducing the electronic coherent motion.
A 3.7 fs pulsed laser is used to selectively pump the two lowest electronic transitions of semiconducting single-walled carbon nanotubes,which induces a low-frequency oscillation radial breathing mode(RBM)and a highfrequency oscillation axis stretching mode(GM)along the carbon tubes.By changing the pump bandwidth,the pump effects of the lowest single-excited-state and dual-excited-state on the amplitudes and initial phases of the two vibrational modes are detected.The research result indicates that the amplitudes of RBM and GM,as well as the initial phase of GM,are obviously modulated.With the influence of coherent electro-phonon coupling on phonon field,the parameters of the vibrational modes of the carbon nanotubes lattice structure are modulated.This provides apossibility to regulate the coherent lattice vibration properties by inducing the electronic coherent motion.
引文
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[2]Htoon H,OConnell M J,Doorn S K,et al.Singlecarbon nanotubes probed by photoluminescenceexcitation spectroscopy:the role of phonon-assistedtransitions[J].Physical Review Letters,2005,94(12):127403.
[3]Perebeinos V, Tersoff J, Avouris P. Effect ofexciton-phonon coupling in the calculated opticalabsorption of carbon nanotubes[J].Physical ReviewLetters,2005,94(2):027402.
[4]Dyatlova O A,Khler C,Malic E,et al.Ultrafastrelaxation dynamics via acoustic phonons in carbonnanotubes[J].Nano Letters,2012,12(5):2249-2253.
[5]Wang J C,Zhang F T,Qiu J R.Research progresssingle femtosecond laser induced nanogratings inglass:fundamentals and applications[J].ChineseJournal of Lasers,2017,44(1):0102001.王珏晨,张芳腾,邱建荣.单光束飞秒激光诱导玻璃内部纳米光栅机理及应用研究进展[J].中国激光,2017,44(1):0102001.
[6]Wu Y H, Yang B P, Kang X M. Effects ofprocessing parameters of ultra-fast laser on surfacecoloring of stainless steel[J].Chinese Journal ofLasers,2017,44(3):0302005.吴勇华,杨保平,康献民.超快激光工艺参数对不锈钢表面着色的影响[J].中国激光,2017,44(3):0302005.
[7]Ding T,Wang X H,Wang G D,et al.Welding offused silica by using high repetition frequencyfemtosecond laser[J].Chinese Journal of Lasers,2018,45(7):0701007.丁腾,王雪辉,王关德,等.高重频飞秒激光焊接石英玻璃[J].中国激光,2018,45(7):0701007.
[8]Kobayashi T,Nie Z G,Du J,et al.Electronicrelaxation and coherent phonon dynamics insemiconducting single-walled carbon nanotubes withseveral chiralities[J].Physical Review B,2013,88(3):035424.
[9]Kobayashi T,Nie Z G,Xue B,et al.Real-timespectroscopy of single-walled carbon nanotubes fornegative time delays by using a few-cycle pulse laser[J].The Journal of Physical Chemistry C,2014,118(6):3285-3294.
[10]Gambetta A,Manzoni C,Menna E,et al.Real-timeobservation of nonlinear coherent phonon dynamics insingle-walled carbon nanotubes[J].Nature Physics,2006,2(8):515-520.
[11]Lim Y S,Yee K J,Kim J H,et al.Coherent latticevibrations in single-walled carbon nanotubes[J].Nano Letters,2006,6(12):2696-2700.
[12]Kim J H,Han K J,Kim N J,et al.Chirality-selective excitation of coherent phonons in carbonnanotubes by femtosecond optical pulses[J].PhysicalReview Letters,2009,102(3):037402.
[13]Sanders G D,Stanton C J,Kim J H e,t al.Resonantcoherent phonon spectroscopy of single-walled carbonnanotubes[J].Physical Review B,2009,79(20):205434.
[14]Kato K,Ishioka K,Kitajima M,et al.Coherentphonon anisotropy in aligned single-walled carbonnanotubes[J].Nano Letters,2008,8(10):3102-3108.
[15]Lüer L,Gadermaier C,Crochet J,etal.Coherentphonon dynamics in semiconducting carbonnanotubes:aquantitative study of electron-phononcoupling[J].Physical Review Letters,2009,102(12):127401.
[16]Lim Y S,Ahn J G,Kim J H,et al.Resonantcoherent phonon generation in single-walled carbonnanotubes through near-band-edge excitation[J].ACS Nano,2010,4(6):3222-3226.
[17]Wang J G,Graham M W,Ma Y Z,et al.Ultrafastspectroscopy of midinfrared internal excitontransitions in separated single-walled carbonnanotubes[J].Physical Review Letters,2010,104(17):177401.
[18]Zhu Z P,Crochet J,Arnold M S,et al.Pump-probespectroscopy of exciton dynamics in(6,5)carbonnanotubes[J].The Journal of Physical Chemistry C,2007,111(10):3831-3835.
[19]DumitricT,Garcia M E,Jeschke H O,et al.Breathing coherent phonons and caps fragmentation incarbon nanotubes following ultrafast laser pulses[J].Physical Review B,2006,74(19):193406.
[20]Jeschke H O,Romero A H,Garcia M E,et al.Microscopic investigation of laser-induced structuralchanges in single-wall carbon nanotubes[J].PhysicalReview B,2007,75(12):125412.
[21]DumitricT,Garcia M E,Jeschke H O,et al.Selective cap opening in carbon nanotubes driven bylaser-induced coherent phonons[J].Physical ReviewLetters,2004,92(11):117401.
[22]Shimura A,Yanagi K,Yoshizawa M.Phase analysisof coherent radial-breathing-mode phonons in carbonnanotubes:implications for generation and detectionprocesses[J].Physical Review B,2018,97(3):035441.
[23]Nugraha A R T,Hasdeo E H,Saito R.Selectivecoherent phonon-mode generation in single-wallcarbon nanotubes[J].Journal of Physics:CondensedMatter,2017,29(5):055302.
[24]Nugraha A R T,Hasdeo E H,Sanders G D,etal.Origin of coherent G-band phonon spectra in single-wall carbon nanotubes[J].Physical Review B,2015,91(4):045406.
[25]Lim Y S,Nugraha A R T,Cho S J,et al.Ultrafastgeneration of fundamental and multiple-order phononexcitations in highly enriched(6,5)single-wallcarbon nanotubes[J].Nano Letters,2014,14(3):1426-1432.
[26]Zeiger H J,Vidal J,Cheng T K,et al.Theory fordisplacive excitation of coherent phonons[J].PhysicalReview B,1992,45(2):768-779.
[27]Kim J H,Yee K J,Lim Y S,et al.Dephasing of G-band phonons in single-wall carbon nanotubes probedvia impulsive stimulated Raman scattering[J].Physical Review B,2012,86(16):161415.
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[32]Bachilo S M,Balzano L,Herrera J E,et al.Narrow(n, m)-distribution of single-walled carbonnanotubes grown using a solid supported catalyst[J].Journal of the American Chemical Society,2003,125(37):11186-11187.
[33]Miyata Y,Yanagi K,Maniwa Y,et al.Diameteranalysis of rebundled single-wall carbon nanotubesusing X-ray diffraction:verification of chiralityassignment based on optical spectra[J].The Journalof Physical Chemistry C,2008,112(41):15997-16001.
[34]Ikuta M,Yuasa Y,Kimura T,et al.Phase analysisof vibrational wave packets in the ground and excitedstates in polydiacetylene[J].Physical Review B,2004,70(21):214301.
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