三维手性壳状银纳米结构的非线性饱和吸收特性研究（英文）
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摘要
采用微球自组装及倾斜真空热蒸镀技术制作了三维手性壳状银纳米结构,采用Z扫描技术研究了该样品在532nm波长、4ns脉宽的Nd:YAG激光入射下的非线性饱和吸收特性。研究结果表明,当入射激光强度达到2.5×10~9 W/cm~2时,其非线性吸收系数可达-1.45×10~(-5) cm/W,该结果比文献报道的悬浮液中的胶体银纳米颗粒的非线性吸收系数(-1.5×10~(-9) cm/W)大四个数量级。实验还发现,该样品的非线性吸收系数随着入射激光的偏振方向改变而出现明显的变化。文中对其非线性吸收的增强机理及偏振依赖性进行了分析讨论。
Three-dimensional chiral shell-like silver nanostructures are fabricated by micro-sphere self-assembly and tilted vacuum thermal deposition techniques,and the nonlinear saturation absorption characteristics of the sample are investigated by Z-scan technique with 4 ns pulsed Nd:YAG laser at 532 nm wavelength.Our results show that when the irradiation intensity reaches to 2.5×10~9 W/cm~2,the derived nonlinear absorption coefficient β can achieve to-1.45×10~(-5) cm/W,which is four orders of magnitude larger than the nonlinear absorption coefficient-1.5×10~(-9) cm/W of colloidal silver nanoparticles in suspensions.We also found that the nonlinear absorption coefficient of the silver nanostructure changes significantly with the polarization direction of incident light.The enhancement mechanism and polarization dependence of the nonlinear absorption are analyzed and discussed.
Three-dimensional chiral shell-like silver nanostructures are fabricated by micro-sphere self-assembly and tilted vacuum thermal deposition techniques,and the nonlinear saturation absorption characteristics of the sample are investigated by Z-scan technique with 4 ns pulsed Nd:YAG laser at 532 nm wavelength.Our results show that when the irradiation intensity reaches to 2.5×10~9 W/cm~2,the derived nonlinear absorption coefficient β can achieve to-1.45×10~(-5) cm/W,which is four orders of magnitude larger than the nonlinear absorption coefficient-1.5×10~(-9) cm/W of colloidal silver nanoparticles in suspensions.We also found that the nonlinear absorption coefficient of the silver nanostructure changes significantly with the polarization direction of incident light.The enhancement mechanism and polarization dependence of the nonlinear absorption are analyzed and discussed.
引文
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[2] SREEKANTH J.VARMA,JITESH KUMAR,et al.Ajayan,and Jayan Thomas.2D TiS2 layers:A superior nonlinear optical limiting material.Advanced Optical Materials,5(24):1700713,2017.
[3] LU LU,XIAN TANG,RUI CAO,et al.Broadband nonlinear optical response in few-layer antimonene and antimonene quantum dots:A promising optical kerr media with enhanced stability.Advanced Optical Materials,5(17):1700301,2017.
[4] FELICITAS WALTER,GUIXIN LI,CEDRIK MEIER,et al.Ultrathin nonlinear metasurface for optical image encoding.Nano Letters,17(5):3171-3175,2017.
[5] XING XIUSHUANG,SA RONGJIAN,LI PEIXIN,et al.Second-order nonlinear optical switching with a record-high contrast for a photochromic and thermochromic bistable crystal.Chemical Science,8(11):7751-7757,2017.
[6] SCHMIDT W,SCHFER F P.Self-mode-locking of dye-lasers with saturated absorbers.Physics Letters A-PHYS LETT A,26:558-559,1968.
[7] ZYGMUNT MIERCZYK ANTONIANGELO AGNESI ANNALISA GUANDALINI GIANCARLO C.Reali Jan Karol Jabczynski,Krzysztof Kopczynski.Application of v3+:YAG crystals for q-switching and mode-locking of 1.3-um diode-pumped neodymium lasers.Optical Engineering,40:2802-2811,2001.
[8] KISEL V E,RUDENKOV A S,PAVLYUK A A,et al.High-power,efficient,semiconductor saturable absorber mode-locked yb:kgw bulk laser.Opt Lett,40(12):2707-2710,2015.
[9] MENGXIN REN,ERIC PLUM,JINGJUNXU,et al.Giant nonlinear optical activity in a plasmonic metamaterial.Nature communications,3:833,2012.
[10] NATALIE L,GRUENKE M,FERNANDA CARDINAL,et al.Ultrafast and nonlinear surface-enhanced raman spectroscopy.Chem.Soc.Rev.,45:2263-2290,2016.
[11] SAIDUAN,GUANGJUNTIAN,YONGFEIJI,et al.Theoretical modeling of plasmon-enhanced raman images of a single molecule with subnanometer resolution.Journal of the American Chemical Society,137(30):9515-9518,2015.
[12] NIE W J,ZHANG Y X,YU H H,et al.Plasmonic nanoparticles embedded in single crystals synthesized by gold ion implantation for enhanced optical nonlinearity and efficient q-switched lasing.Nanoscale,10:4228-4236,2018.
[13] XIAOYAN ZHANG,ANDREW SELKIRK,SAIFENG ZHANG,et al.MoS2 carbon nanotube coreshell nanocomposites for enhanced nonlinear optical performance.Chemistry A European Journal,23(14):3321-3327,2017.
[14] HANG ZHANG,ZHONGLIANG HU,ZHIJUN MA,et al.Anisotropically enhanced nonlinear optical properties of ensembles of gold nanorod selectrospun in polymer nanofiber film.ACS Applied Materials & Interfaces,8(3):2048-2053,2016.
[15] HUMBERTO MICHINEL,ALICIA V,CARPENTIER,et al.Z-scan measurement of the nonlinear response of new materials by using a high-repetition-rate femtosecond laser.International Conference Apylications of Optics and Photonics,800110,2011.
[16] HIDEYUKI INOUYE,KOICHIRO TANAKA,ICHIRO TANAHASHI,et al.Ultrafast dynamics of nonequilibrium electrons in a gold nanoparticle system.Phys Rev B,57:11334-11340,1998.
[17] YARONG SU,SONG YE,YIDONG HOU,et al.Design and fabrication of diverse three-dimensional shell-like nano-structures.Microelectronic Engineering,115:6 -12,2014.
[18] YIDONG HOU,SHUHONG LI,YARONG SU,et al.Design and fabrication of three-dimensional chiral nanostructures based on stepwise glancing angle deposition technology.Langmuir,29(3):867-872,2013.
[19] SHEIK-BAHAE M,SAID A A,WEI T H,et al.Van Stryland.Sensitive measurement of optical nonlinearities using a single beam.IEEE Journal of Quantum Electronics,26(4):760-769,1990.
[20] DABIN YU,XIAOQUAN SUN,JINTIANBIAN,et al.Gamma radiation synthesis,characterization and nonlinear optical properties of highly stable colloidal silver nanoparticles in suspensions.Physica E:Low-dimensional Systems and Nanostructures,23(1):50-55,2004.
[21] HONGRU MA,RONGFU XIAO,PING SHENG.Third-order optical nonlinearity enhancement through composite microstructures.J Opt Soc Am B,15(3):1022-1029,1998.
[22] DAVID R,SMITH,JOHN B.Pendry.Homogenization of metamaterials by field averaging (invited paper).J Opt Soc Am B,23(3):391-403,2006.