Attenuated total reflection and surface plasmon emission light properties of molecular aligned naphthacene thin films

2006 ◽  
Author(s):  
Keizo Kato ◽  
Tohru Shimaoka ◽  
Kazuki Yamashita ◽  
Yasuo Ohdaira ◽  
Kazunari Shinbo ◽  
...  
Keyword(s):  
Thin Films ◽  
Surface Plasmon ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Emission Light

NANOSTRUCTURED LB FILMS AND EMISSION LIGHT DUE TO MULTIPLE SURFACE PLASMON EXCITATIONS IN THE KRETSCHMANN CONFIGURATION

2002 ◽  
Vol 01 (05n06) ◽  
pp. 409-414
Author(s):  
FUTAO KANEKO ◽  
MITSURU TERAKADO ◽  
TOSHIHARU SATO ◽  
HIROTSUGI HATAKEYAMA ◽  
WATARU SAITO ◽  
...  
Keyword(s):  
Laser Beam ◽  
Surface Plasmon ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Dye Molecules ◽  
Lb Films ◽  
Langmuir Blodgett ◽  
Kretschmann Configuration ◽  
Direct Irradiation ◽  
Emission Light

Surface plasmon (SP) excitations have been investigated in the attenuated total reflection (ATR) Kretschmann configuration of prism/metal/Langmuir–Blodgett (LB) films containing dyes. The emission light through the prism was observed using direct irradiation of a laser beam from air to the LB films, i.e., reverse irradiation. The emission intensities depend on the emission angles through the prism, nanostructure of metal and LB films, dye molecules, separation between metal and dye molecules, interactions of dye molecules, etc. The spectra is strongly depended on the emission angles, and the emission light was caused by multiple SP excitations. Nanostructured devices of LB films using SP excitations are described.

Photoelectric Cells of Merocyanine Langmuir-Blodgett Films Utilizing Surface Plasmon Excitations

2001 ◽  
Vol 708 ◽  
Author(s):  
Keizo Kato ◽  
Futoshi Takahashi ◽  
Kazunari Shinbo ◽  
Futao Kaneko ◽  
Takashi Wakamatsu
Keyword(s):  
Thin Films ◽  
Surface Plasmon ◽  
Short Circuit ◽  
Schottky Diodes ◽  
Attenuated Total Reflection ◽  
Dielectric Constants ◽  
Type I ◽  
Type Ii ◽  
Lb Films ◽  
Langmuir Blodgett

ABSTRACTShort-circuit photocurrents (ISC) due to surface plasmon (SP) excitations have been investigated for the photoelectric cells using Langmuir-Blodgett (LB) films of merocyanine (MC) dye. The MC dye exhibits p-type conduction, and the Schottky and Ohmic contacts are obtained at the interfaces between MC LB films and Al thin films and between MC LB films and Ag thin films, respectively. Since the Schottky diodes show the photoelectric effects, the Schottky photoelectric cells have been constructed. The cells with two kinds of structures, that is, prism/Al/MC/Ag (type I) and prism/MgF2/Al/MC/Ag (type II), have been prepared. In the attenuated total reflection (ATR) method, the types I and II have the Kretschmann and both the Kretschmann and Otto configurations, respectively. SP has been resonantly excited at the interface between Ag and air for the type I and at the interfaces between MgF2 and Al between Ag and air for the type II. The ATR and the ISC properties have been simultaneously measured as a function of the incident angles of the laser beams. The peaks of the ISC have corresponded to the resonant angles of the ATR curves. The electric fields and optical absorptions in the cells have been also calculated using the dielectric constants and the film thicknesses obtained from the ATR measurements. The calculated absorptions in the MC layers as a function of the incident angles have corresponded to the results of ISC. It has been estimated that the ISC for both types I and II could be enhanced by the excitations of SP in the ATR configurations.

Emission Light Properties from Ag/Rhodamine-B LB Films Due to Surface Plasmon Excitations in the Kretschmann and Reverse Configurations

2000 ◽  
Vol 660 ◽  
Author(s):  
T. Nakano ◽  
H. Kobayashi ◽  
K. Shinbo ◽  
K. Kato ◽  
F. Kaneko ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Rhodamine B ◽  
Emission Angle ◽  
Attenuated Total Reflection ◽  
Peak Wavelength ◽  
Resonant Condition ◽  
Lb Films ◽  
Langmuir Blodgett ◽  
Kretschmann Configuration ◽  
Emission Light

ABSTRACTEmission light from Ag/ Rhodamine-B (RB) Langmuir-Blodgett (LB) films due to surface plasmon (SP) excitations has been investigated using the Kretschmann configuration of the attenuated total reflection (ATR) method and the reverse irradiation of laser beam from air to the samples. The conventional photoluminescence (PL) of the RB LB films showed a broad spectrum and the peak wavelength was about 600 nm. In the reverse irradiation, emission light was observed through the prism, and the intensities and the spectra strongly depended upon the emission angle where the light was observed. The wavelengths of the emission light became shorter as the emission angles increased. The relation between the wavelength and the emission angle agreed with the resonant condition of excitations of SPs in the Kretschmann configuration of ATR method. It was concluded that the emission light was caused by excitations of multiple SPs at the Ag/RB LB films.

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