Electrically controlled surface plasmon resonance frequency of gold nanorods

We have presented the voltage-controlled tuning of plasmonic response of absorption spectra of gold nanorods in liquid crystals. We observe that gold nanorods can be aligned along the rubbed polyimide substrate before applying external voltage. It is found that the transverse mode of gold nanorods shows a blueshift or a redshift when rotating the analyzer parallel or perpendicular to the rubbing direction, respectively, while all longitudinal modes display a redshift behavior. This work offers an easy way to tune the transverse and longitudinal modes of gold nanorods simultaneously, which makes it feasible to establish the color tunable devices.

[1]  P. Gennes,et al.  The physics of liquid crystals , 1974 .

[2]  Z. Kam,et al.  Absorption and Scattering of Light by Small Particles , 1998 .

[3]  Michael Vollmer,et al.  Optical properties of metal clusters , 1995 .

[4]  David A. Weitz,et al.  Direct Measurement of Colloidal Forces in an Anisotropic Solvent , 1997 .

[5]  Holger Stark,et al.  Novel Colloidal Interactions in Anisotropic Fluids , 1997, Science.

[6]  David Pettey,et al.  TOPOLOGICAL DEFECTS AND INTERACTIONS IN NEMATIC EMULSIONS , 1998 .

[7]  M. El-Sayed,et al.  Spectral Properties and Relaxation Dynamics of Surface Plasmon Electronic Oscillations in Gold and Silver Nanodots and Nanorods , 1999 .

[8]  Gu,et al.  Observation of saturn-ring defects around solid microspheres in nematic liquid crystals , 2000, Physical review letters.

[9]  Mona B. Mohamed,et al.  Femtosecond transient-absorption dynamics of colloidal gold nanorods: Shape independence of the electron-phonon relaxation time , 2000 .

[10]  Philippe Barois,et al.  Colloidal ordering from phase separation in a liquid- crystalline continuous phase , 2000, Nature.

[11]  P. Poulin,et al.  Application of an electric field to colloidal particles suspended in a liquid-crystal solvent. , 2001, Physical review letters.

[12]  M. P. Allen,et al.  Defect structures and torque on an elongated colloidal particle immersed in a liquid crystal host. , 2002, Physical review. E, Statistical, nonlinear, and soft matter physics.

[13]  Thomas A. Klar,et al.  Electrically controlled light scattering with single metal nanoparticles , 2002 .

[14]  Mostafa A. El-Sayed,et al.  Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed-Mediated Growth Method , 2003 .

[15]  W. Barnes,et al.  Surface plasmon subwavelength optics , 2003, Nature.

[16]  E. J. Felton,et al.  Elastic Torque and the Levitation of Metal Wires by a Nematic Liquid Crystal , 2004, Science.

[17]  E. Towe,et al.  Optical properties of nanometer-sized gold spheres and rods embedded in anodic alumina matrices , 2004 .

[18]  E. Hutter,et al.  Exploitation of Localized Surface Plasmon Resonance , 2004 .

[19]  Jun Zhao,et al.  Shape dependent resonance light scattering properties of gold nanorods , 2005 .

[20]  D. Reich,et al.  Static and dynamic properties of magnetic nanowires in nematic fluids (invited) , 2005 .

[21]  Jen-chia Wu,et al.  Organic solvent dependence of plasma resonance of gold nanorods: A simple relationship , 2005 .

[22]  P. Alsing,et al.  Electric field tuning of plasmonic response of nanodot array in liquid crystal matrix. , 2005, Nano letters.

[23]  P. Yeh.  Optics of Liquid Crystal Displays , 2007, 2007 Conference on Lasers and Electro-Optics - Pacific Rim.