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Abstract
We present a systematic study on optical reflection (OR) and photoluminescence (PL) of gold nanosphere arrays formed on polystyrene (PS) templates. These optical coefficients are measured at room-temperature when the diameter of single nanosphere varies from 200 nm to 2000 nm and the shell thickness changes from 5 nm to 15 nm. The OR spectrum shows the surface plasmon resonance (SPR) and two peaks at about 375 nm and 540 nm wavelengths for all samples. The strong PL emission is observed in 315–350 nm wavelength. We find that the amplitude of the OR and PL spectra depends quite sensitively on diameter and shell thickness of the nanosphere.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant No. 10974206, 1174286), Department of Science and Technology of Yunnan Province, Chinese Academy of Sciences, Provincial Natural Science Foundation of Anhui (Grant No. 11040606M62), and by the National Basic Research Program of China (973 Program, Grant No. 2011CB302103)