Research On Movement Of Biological Particles Under The Influence Of Entropy Potential In Periodic Structure

The microstructure is different in chemical, mechanical, optical and thermal properties because of its surface effect,size effects and quantum effect. As an outstanding representative of Micro- nanostructures, the Noble Metal stands out in the field of photothermal enhancement effect since its unique characteristics of localized surface plasmon resonance. Metal nanostructures can be used as an efficient heat source,the electromagnetic fields can be highly focused on nanoscale volume around it, meanwhile the precision control of the temperature at the nanoscale can be achieved, which has potential to be implemented in chemical catalysis, heat-assisted magnetic recording, and medical therapy.In this paper, absorption spectrometry and distribution of electromagnetic fields from several kind of gold nanostructures under the water and plane polarized incident light excitation are carried out by taking advantage of discrete dipole approximation(DDA). Furthermore, the thermal enhancement of this nanostructure is also simulated through the use of Fourier's law of heat conduction. The numerical simulations from one-dimensional symmetry broken gold nanostructure show that magnetic energy can be effectively converted into thermal energy by adjusting the degree of asymmetry, strongly localized confinement and highly enhancement of thermal energy around the nanostructure can be realized. Moreover, the optical properties of a symmetric system composed of two one-dimensional symmetric broken gold nanostructures significantly affected by the polarization of the resonance light. Furthermore, the temperature from thermal enhancement from a H-shaped gold nanostructure under the water can be controlled over a wide range by adjusting the polarization of the resonance light. These theoretical results can be implemented in future surface plasmon devices for the precision control of the temperature at the nanoscale.