Loss Measurement in Plasmonic Modes in Metal-Insulator-Metal Waveguides by Attenuated Total Reflection

2010 ◽  
Author(s):  
Chien-I Lin ◽  
Thomas K. Gaylord
Keyword(s):  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Metal Insulator ◽  
Loss Measurement ◽  
Metal Insulator Metal

scholarly journals Designing a new optical biosensing platform based on an insulator-metal-insulatornanostructure

2021 ◽  
Vol 63 (6) ◽  
pp. 1-5
Author(s):  
Dinh Dat Pham ◽  
◽  
Tien Thanh Pham ◽  
Keyword(s):  
Optical Properties ◽  
Incident Light ◽  
Surrounding Medium ◽  
Attenuated Total Reflection ◽  
Free Electrons ◽  
Optical Biosensing ◽  
Metal Insulator ◽  
Visible Wavelength Range ◽  
Metal Insulator Metal ◽  
Calculation Results

The insulator-metal-insulator (IMI) structure is potential for the fabrication of biosensor platform devices because of its unique optical properties, especially surface plasmon resonance (SPR). In this study, the optical properties of the IMI structure in the visible wavelength range were calculated using the transfer matrix method. The results indicated that the IMI structure exhibited high absorbance at the proper wavelength due to the SPR. This phenomenon was resulted from the resonance of incident light and the free electrons in the metal surface. The SPR signal relied on the thickness of layers in the IMI structure and the refractive index of the surrounding medium. Based on calculation results, the IMI structure applied for the biosensor was designed and optimised with respects to optical properties. In addition, sensitivity calculation demonstrated that IMI structure was more sensitive than biosensor based on attenuated total reflection (ATR), SPR method while similar results were attained with the metal-insulator-metal (MIM) structure method.

Modeling, Fabrication, and Electrical Testing of Metal-Insulator-Metal Diode

2011 ◽  
Author(s):  
Terrance O'Regan ◽  
Matthew Chin ◽  
Cheng Tan ◽  
Anthony Birdwell
Keyword(s):  
Metal Insulator ◽  
Metal Insulator Metal

Gas Cell Infrared and Attenuated Total Reflection Infrared Spectroscopic Studies for Organic–Inorganic Interactions in Adsorption of Fulvic Acid on the Goethite Surface Generating Carbon Dioxide

2021 ◽  
pp. 000370282199121
Author(s):  
Yuki Nakaya ◽  
Satoru Nakashima ◽  
Takahiro Otsuka
Keyword(s):  
Carbon Dioxide ◽  
Activation Energy ◽  
Fulvic Acid ◽  
Spectroscopic Studies ◽  
Reaction Model ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Gas Cell ◽  
Rate Determining Step ◽  
Ir Spectroscopic

The generation of carbon dioxide (CO2) from Nordic fulvic acid (FA) solution in the presence of goethite (α-FeOOH) was observed in FA–goethite interaction experiments at 25–80 ℃. CO2 generation processes observed by gas cell infrared (IR) spectroscopy indicated two steps: the zeroth order slower CO2 generation from FA solution commonly occurring in the heating experiments of the FA in the presence and absence of goethite (activation energy: 16–19 kJ mol–1), and the first order faster CO2 generation from FA solution with goethite (activation energy: 14 kJ mol–1). This CO2 generation from FA is possibly related to redox reactions between FA and goethite. In situ attenuated total reflection infrared (ATR-IR) spectroscopic measurements indicated rapid increases with time in IR bands due to COOH and COO– of FA on the goethite surface. These are considered to be due to adsorption of FA on the goethite surface possibly driven by electrostatic attraction between the positively charged goethite surface and negatively charged deprotonated carboxylates (COO–) in FA. Changes in concentration of the FA adsorbed on the goethite surface were well reproduced by the second order reaction model giving an activation energy around 13 kJ mol–1. This process was faster than the CO2 generation and was not its rate-determining step. The CO2 generation from FA solution with goethite is faster than the experimental thermal decoloration of stable structures of Nordic FA in our previous report possibly due to partial degradations of redox-sensitive labile structures in FA.

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