可见光区层状薄金属的抗磁性
Diamagnetic nature of stratified thin metals in visible range
摘要：
数值模拟表明，在层状金属-介质异向介质中，可见光频率处出现了有效的强抗磁共振。用双复反射率法提取了有效光学常数。它澄清了有效的抗磁响应起源于局部抗磁性在分层薄金属。有效抗磁性对单胞的结构非常敏感。有效抗磁响应总是与有效等离子体频率相关联，因此被视为集体激发的磁分量。
英文摘要：
It is numerically demonstrated that effectively strong diamagnetic resonance emerges at visible frequencies in stratified metal-dielectric metamaterials. The effective optical constants are extracted by two-complex reflectivity method. It is clarified that the effective diamagnetic response originates from local diamagnetism at stratified thin metals. The effective diamagnetism is crucially sensitive to the sturucture of unitcell. The effective diamagnetic response is always associated with effective plasma frequency and is therefore regarded as a magnetic component of the collective excitation.
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