Control of magnetic flux in a YBa2Cu3O7−δ thin film loop using femtosecond laser pulses
Control of magnetic flux in a YBa2Cu3O7−δ thin film loop using femtosecond laser pulses
复制标题
使用飞秒激光脉冲控制 YBa2Cu3O7−δ 薄膜环中的磁通量
DOI：
10.1063/1.120029
复制
发表时间：
1997
影响因子：
4
通讯作者：
K. Sakai
中科院分区：
文献类型：
--
作者：
M. Tonouchi;N. Wada;M. Hangyo;M. Tani;K. Sakai
提出并演示了一种利用飞秒脉冲激光的超导光磁通量捕获存储器。磁通量被捕获在一个简单的YBa₂Cu₃O₇₋ₓ薄膜环中，其极性通过光超流调制来控制。去除外部偏置电流后，通过观察距离样品60厘米处的电磁脉冲辐射来检测捕获的磁通量，该辐射是由调制在环中循环的持续电流所激发的。结合存储器中的电流分布，对磁通量的读取机制进行了讨论。
A superconducting optical flux-trap memory with a femtosecond pulsed laser is proposed and then demonstrated. The magnetic flux is trapped in a simple YBa2Cu3O7−δ thin film loop with a polarity controlled by means of optical supercurrent modulation. After removing the external bias current, the trapped fluxes are detected by observing electromagnetic pulse radiation 60 cm away from the sample, which is excited by modulating a persistent current that circulates in the loop. The mechanism for the readin of the magnetic fluxes is discussed in relation to the current distribution in the memory.