辐照
材料科学
光子学
重离子
离子
光电子学
物理
核物理学
量子力学
作者
Ziqiang Zhao,Yingmin Liu,Yan Chen,Lan Ding,Yuren Wang
摘要
Photonic crystals (PC) have received extensive attention for the photonic band gap (PBG).The polystyrene (PS) particles bottom-up approach is a productive method for photonic crystal manufacture, this kind of photonic crystals having an unique PBG that depends on the particle's shape, sizes and defects.Heavy ion irradiation is a very useful method to induce defects in PC and change the shapes of the particles to tune the PBG.MeV heavy ion irradiation leads to an anisotropic deformation of the particles from spherical to ellipsoidal, the aspect ratio of which can be precisely controlled by using the ion energy and flux.Sub-micrometer PS particles were deposited on a Cu substrate and were irradiated at 230 K by using heavy ion energy and fluence in the range from 2 to 10 MeV and 1 × 10 14 cm -2 to 1 × 10 15 cm -2 , respectively.
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