Quantum Emitters near Layered Plasmonic Nanostructures: Decay Rate Contributions

This paper investigates the spontaneous decay rate of elliptical plasmonic nanostructures. The refractive index was analyzed using the effective medium theory (EMT). Then, the polarizability, spontaneous radiative, non-radiative decay rate, and electric field enhancement factor were characterized for the targeted elliptical nanostructures at different aspect ratios. All of the optical analyses were analyzed at different distances between the excited fluorescent coupled atom and the plasmonic nanostructure (down to 100 nm). This work is promising in selecting the optimum elliptical nanostructure according to the required decay rates for optical conversion efficiency control in energy harvesting for solar cells and optical sensing applications.

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Ultrafast Dynamics of Heat Generation in Plasmonic Nanostructures

10.21236/ada611312 ◽

2014 ◽

Author(s):

Xiang Zhang

Keyword(s):

Heat Generation ◽

Plasmonic Nanostructures ◽

Ultrafast Dynamics

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Bacterial die-away rates in red sea waters

Water Science & Technology ◽

10.2166/wst.1995.0071 ◽

1995 ◽

Vol 32 (2) ◽

pp. 45-52 ◽

Cited By ~ 2

Author(s):

H. Z. Sarikaya ◽

A. M. Saatçi

Keyword(s):

Solar Radiation ◽

Decay Rate ◽

Sea Water ◽

Membrane Filter ◽

Linear Regression Analysis ◽

Total Coliform ◽

Coliform Bacteria ◽

Decay Rate Constant ◽

Solar Intensity ◽

Log Normal

Total coliform bacteria have been chosen as the indicator organism. Coliform die-away experiments have been carried out in unpolluted sea water samples collected at about 100 m off the coastline and under controlled environmental conditions. The samples were transformed into one litre clean glass beakers which were kept at constant temperature and were exposed to the solar radiation. The membrane filter technique was used for the coliform analysis. The temperature ranged from 20 to 40° C and the dilution ratios ranged from 1/50 to 1/200. Coliform decay rate in the light has been expressed as the summation of the coliform decay rate in the dark and the decay rate due to solar radiation. The solar radiation required for 90 percent coliform removal has been found to range from 17 cal/cm2 to 40 cal/cm2 within the temperature range of 25 to 30° C. Applying the linear regression analysis two different equations have been given for the high (I>10 cal/cm2.hour) and low solar intensity ranges in order to determine the coliform decay rate constant as a function of the solar intensity. T-90 values in the light have been found to follow log-normal distribution with a median T-90 value of 32 minutes. The corresponding T-90 values in the dark were found to be 70-80 times longer. Coliform decay rate in the dark has been correlated with the temperature.

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