Plasmonic wave-guiding

As discussed in the previous section, in assemblies or groupings of metal nanoparticles, the LSPR and near-field response is strongly affected by the coupling of the resonances of the 

The colloidal assembly of gold nanorods presents an elegant demonstration of the polarization and orientation dependence of 

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FIG. 4.4 ATR setup for the excitsuon of surface plasmons in Kretschmann geometry. As top) A thin metal film (thickness 50 nm) is evaporated into the base of the prism and acts as a resonator driven by the photon field. (As bottom) The resonant excitation of the surf plasmon wave is seen in the reflectivity curve as a sharp dip at couptii angle Og. (B) Setup for the excitation of guided waves. Modes are excited at the (external) at e 6n,. 

In order to make meaningful physical measurements on monolayer and multilayer L-B films, it is essential that the films be characterized to determine the molecular structure, unformity of the film and layer-to-layer structural correlation. To probe the molecular structure, our research group has utilized a variety of spectroscopic techniques such as u.v.-visible spectroscopy, ATR-IR, wave-guide Raman, surface-plasmon wave Raman spectroscopy and inelastic electron tunneling. The spectroscopic techniques... 

Gilmore M.A., Johnson B.L., (2003) Forbidden guided-wave plasmon polaritons in coupled thin films J. Appl. Phys. 93,4497-4504. 

Lahav A, Auslender M, Abdulhalim I (2008) Sensitivity enhancement of guided wave surface plasmon resonance sensors. Opt Lett 33 2539-2541... 

As a result of the heterogeneous distributions of electrical charge and chemical functionalities present on the surface of most proteins, the adsorption of proteins to solid substrates of differing surface properties may produce different molecular orientations. The optical thickness of protein layers can be evaluated by using el-lipsometry, surface plasmon resonance, or guided wave perturbation. When a chro-mophore of the protein is used as a probe, polarized spectroscopic techniques are found to be applicable to measure the tilt angle of the heme moiety in protein films. Macdonald and Smith used SERRS... 

Benson DK, Tracy CE, Lee S-H, Hishmeh GA, Haberman DP, Ciszek PA (1998) Low-cost, fiber-optic hydrogen gas detector using guided-wave, surface-plasmon resonance in chemochromic thin films. NREL/CP-590-25611, pp 1-18... 

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