Optical and magneto-optical properties in Fe-doped glasses irradiated with femtosecond laser
Optical and magneto-optical properties in Fe-doped glasses irradiated with femtosecond laser
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DOI：
10.1007/s00340-013-5489-z
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发表时间：
2013-06
期刊：
影响因子：
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通讯作者：
S. Nakashima;K. Sugioka;Katsuhisa Tanaka;K. Midorikawa;K. Mukai
中科院分区：
文献类型：
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作者：
S. Nakashima;K. Sugioka;Katsuhisa Tanaka;K. Midorikawa;K. Mukai
研究了α- fe2o3掺杂透明玻璃的光学、磁性和磁光性质，并对其进行了红外激光辐照和退火处理。与制备的样品相比，辐照玻璃的室温饱和磁化强度有所提高，这是由于铁磁性铁氧体纳米颗粒（NPs）的析出。通过在等离子体金属前驱体中添加进一步的掺杂剂，辐照和热退火后，Au或Al NPs与铁氧体NPs在密闭区域内有空间选择性地析出。在共掺杂Al的玻璃中，磁光法拉第效应被等离子体增强，并表现出明显的负峰，这是由于铁氧体NPs的铁磁性与Al NPs的局域表面等离子体共振之间的耦合，而在沉淀铁氧体和Au NPs的玻璃中，由于等离子体共振与玻璃基体的抗磁性的耦合，法拉第效应表现出正增强。
Optical, magnetic, and magneto-optical properties have been investigated for the α-Fe2O3-doped transparent glasses irradiated with an infrared fs laser and subsequently annealed. The values of the saturation magnetization at room temperature for the irradiated glasses were increased compared with the as-prepared samples, which is due to the precipitation of the ferrimagnetic ferrite nanoparticles (NPs). By adding further dopants as precursors of plasmonic metals, Au or Al NPs were space-selectively precipitated together with the ferrite NPs in a confined region after irradiation and thermal annealing. In the case of the glass codoped with Al, magneto-optical Faraday effect was plasmonically enhanced and exhibited a negative distinct peak ascribed to a coupling between the ferrimagnetism of ferrite NPs and the localized surface plasmon resonance of Al NPs, while the glass, in which ferrite and Au NPs were precipitated, showed a positive enhancement of Faraday effect due to a coupling of plasmon resonance with diamagnetism of glass matrix.