PbS-polymer nanocomposite with third-order nonlinear optical response in femtosecond regime

被引：69
作者：
Liu, B
Li, HP
Chew, CH
Que, WX
Lam, YL
Kam, CH
Gan, LM [1 ]
Xu, GQ
机构：
[1] Natl Univ Singapore, Dept Chem, Singapore, Singapore
[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
[3] Inst Mat Res & Engn, Singapore 119260, Singapore
来源：
MATERIALS LETTERS | 2001年 / 51卷 / 06期
关键词：
microemulsion; polymerisation; PbS; nanocomposite; HRTEM; Z-scan; nonlinearity;
D O I：
10.1016/S0167-577X(01)00336-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new method is developed using polymerized bicontinuous rnicroemulsions to synthesize PbS-polymer nanocomposite having large nonlinear optical response. Besides a polymeric nonionic surfactant, omega -methoxy poly(ethylene oxide)(40) undecyl-alpha -methacrylate (C-1-PEO-C-11-MA-40), a system consisting of methyl methacrylate (MMA), acronitrile (AN), ethylene glycol dimethacrylate (EGDMA), aqueous solutions of Pb(NO3)(2)/thioacetamide (TAA) was selected. High-resolution transmission electron microscopy (HRTEM) results indicated PbS nanocrystals with a width of 5 nm and a cubic structure is formed in water domains. A single-beam Z-scan measurement showed that the nanocomposite polymer has a nonresonant and negative nonlinear refractive index (gamma) of 6.8 x 10(-12) cm(2)/W at 780 nm. The origin of the large nonlinear optical response based on the contribution of surface recombination owing to high surface-to-volume ratios of PbS nanoparticles to the optical nonlinearity is discussed. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：461 / 469
页数：9
相关论文
共 29 条
[11]   DEGENERATE 4-WAVE MIXING IN SEMICONDUCTOR-DOPED GLASSES [J].
JAIN, RK ;
LIND, RC .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1983, 73 (05) :647-653
[12]   FEMTOSECOND MEASUREMENT OF NONLINEAR ABSORPTION AND REFRACTION IN CDS, ZNSE, AND ZNS [J].
KRAUSS, TD ;
WISE, FW .
APPLIED PHYSICS LETTERS, 1994, 65 (14) :1739-1741
[13]   Nanostructured polymeric materials from microemulsion polymerization using poly(ethylene oxide) macromonomer [J].
Liu, J ;
Gan, LM ;
Chew, CH ;
Teo, WK ;
Gan, LH .
LANGMUIR, 1997, 13 (24) :6421-6426
[14]   Synthesis and polymerization of a nonionic surfactant: Poly(ethylene oxide) macromonomer [J].
Liu, J ;
Chew, CH ;
Gan, LM .
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY, 1996, A33 (03) :337-352
[15]   Synthesis of monodisperse polystyrene microlatexes by emulsion polymerization using a polymerizable surfactant [J].
Liu, J ;
Chew, CH ;
Gan, LM ;
Teo, WK ;
Gan, LH .
LANGMUIR, 1997, 13 (19) :4988-4994
[16]   VIBRONIC QUANTUM BEATS IN PBS MICROCRYSTALLITES [J].
MACHOL, JL ;
WISE, FW ;
PATEL, RC ;
TANNER, DB .
PHYSICAL REVIEW B, 1993, 48 (04) :2819-2822
[17]   POLYMER-TRAPPED SEMICONDUCTOR PARTICLES [J].
MAHLER, W .
INORGANIC CHEMISTRY, 1988, 27 (03) :435-436
[18]   Microstructural and nonlinear optical properties of silica-titania sol-gel film doped with PbS quantum dots [J].
Martucci, A ;
Fick, J ;
Schell, J ;
Battaglin, G ;
Guglielmi, M .
JOURNAL OF APPLIED PHYSICS, 1999, 86 (01) :79-87
[19]   PHOTOSENSITIZED CHARGE SEPARATION AND HYDROGEN-PRODUCTION IN REVERSED MICELLE ENTRAPPED PLATINIZED COLLOIDAL CADMIUM-SULFIDE [J].
MEYER, M ;
WALLBERG, C ;
KURIHARA, K ;
FENDLER, JH .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1984, (02) :90-91
[20]   SMALL PBS CLUSTERS PREPARED VIA ROMP BLOCK COPOLYMER TECHNOLOGY [J].
SANKARAN, V ;
CUMMINS, CC ;
SCHROCK, RR ;
COHEN, RE ;
SILBEY, RJ .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (19) :6858-6859
123