研究目的
Investigating the layer-selective all-optical switching of magnetization with nanometer resolution using femtosecond laser pulses and plasmon-polariton excitation.
研究成果
The research successfully demonstrated layer-selective all-optical switching of magnetization in a multi-layered heterostructure using femtosecond laser pulses and plasmon-polariton excitation. This method offers a pathway to significantly increase the storage density of opto-magnetic recording by enabling independent addressing of multiple magnetic layers.
研究不足
The study was limited to a bilayer structure, and while the method could theoretically be extended to more layers, practical implementation would require careful design of dielectric layers and optical parameters. The necessity of a coupling prism for SPP excitation may also pose challenges for integration into compact devices.
1：Experimental Design and Method Selection:
The study involved designing a multi-layered heterostructure to facilitate the excitation of surface plasmon-polaritons (SPPs) for layer-selective magnetization switching. Theoretical models were employed to predict the absorption and field distribution across the layers.
2：Sample Selection and Data Sources:
A multi-layered heterostructure of GdFeCo was fabricated, with specific concentrations of gadolinium to achieve different magnetization compensation temperatures in the layers.
3：List of Experimental Equipment and Materials:
The setup included a Ti:Sapphire laser system for generating femtosecond pulses, a magneto-optical microscope for detecting the magnetic state, and various optical components for polarization control and beam shaping.
4：Experimental Procedures and Operational Workflow:
The heterostructure was exposed to single femtosecond laser pulses at varying polarizations and angles of incidence. The magnetic state of each layer was then imaged using magneto-optical microscopy.
5：Data Analysis Methods:
The magneto-optical images were analyzed to determine the magnetic state of each layer, and the absorption and field distributions were calculated to correlate with the experimental observations.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
