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Investigation of multiple metal nanoparticles near-field coupling on the surface by discrete dipole approximation method 被引量:1
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作者 Yin Ping Lin Qiang +1 位作者 Ruan Yi Chen Jing-jing 《Optoelectronics Letters》 EI 2021年第5期257-261,共5页
We use the method of discrete dipole approximation with surface interaction to construct a model in which a plurality of nanoparticles is arranged on the surface of BK7 glass. Nanoparticles are in air medium illuminat... We use the method of discrete dipole approximation with surface interaction to construct a model in which a plurality of nanoparticles is arranged on the surface of BK7 glass. Nanoparticles are in air medium illuminated by evanescent wave generated from total internal reflection. The effects of the wavelength, the polarization of the incident wave, the number of nanoparticles and the spacing of multiple nanoparticles on the field enhancement and extinction efficiency are calculated by our model. Our work could pave the way to improve the field enhancement of multiple nanoparticles systems. 展开更多
关键词 Investigation of multiple metal nanoparticles near-field coupling on the surface by discrete dipole approximation method
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Scattering and absorption characteristics of non-spherical cirrus cloud ice crystal particles in terahertz frequency band 被引量:1
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作者 Tao Xie Meng-Ting Chen +2 位作者 Jian Chen Feng Lu Da-Wei An 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第7期120-127,共8页
We used discrete dipole approximation(DDA)to examine the scattering and absorption characteristics of spherical ice crystal particles.On this basis,we studied the scattering characteristics of spherical ice crystal pa... We used discrete dipole approximation(DDA)to examine the scattering and absorption characteristics of spherical ice crystal particles.On this basis,we studied the scattering characteristics of spherical ice crystal particles at different frequencies and non-spherical ice crystal particles with different shapes,aspect ratios,and spatial orientations.The results indicate that the DDA and Mie methods yield almost the same results for spherical ice crystal particles,illustrating the superior calculation accuracy of the DDA method.Compared with the millimeter wave band,the terahertz band particles have richer scattering characteristics and can detect ice crystal particles more easily.Different frequencies,shapes,aspect ratios,and spatial orientations have specific effects on the scattering and absorption characteristics o f ice crystal particles.The results provide an important theoretical basis for the design of terahertz cloud radars and related cirrus detection methods. 展开更多
关键词 scattering characteristics discrete dipole approximation TERAHERTZ non-sphericalice crystal particles
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