Formation of nano-optical magnonic crystals and its application to spin wave logic elements modulating light

2016 Fiscal Year Final Research Report

• Project/Area Number: 26706009
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Nano/Microsystems
• Research Institution: Toyohashi University of Technology
• Principal Investigator: Goto Taichi 豊橋技術科学大学, 工学(系)研究科(研究院), 助教 (00721507)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ナノ光マグノニック結晶 / ガーネット / 位相干渉 / ロジック回路 / スピントロニクス / スピンデバイス / 磁気 / スピン波

Outline of Final Research Achievements

Magnonic crystals controlling optical waves were proposed in this study. Development of these crystals are divided into three parts. (1) Logic gates using spin waves based on interference phenomena were developed. Two kinds of interferometers were formed using spin wave absorbing techniques. These interferometer showed a high robustness of the spin wave devices. (2) Magnetic films were inserted into the optical cavity to enhance a sensitivity of optical responses to a change of magnetization states. A Q-factor of the optical cavity was quickly modulated, showing two clear separated optical states. This system can transduce the magnetic information to optical one. (3) Nanometer-scale spin-wave media were formed. An interference of spin waves using these thin films were demonstrated successfully.

Free Research Field

磁気工学