Research on Super High Speed Thin-Film Devices Using Magneto-Optic Effects due to Microwave Magnetostatic Waves

1.法拉第对加内特薄膜光学模式转换设备使用磁光学效应的影响，因此磁静态波必须是大的。光学传播损失和传播损失的微波磁悬浮波应该非常小。它发现了在晶体薄膜中传播丢失的磁波，从畸变薄膜沉积在500 ° C的基底上变得非常小，在温度为1000 ° C后退火，持续6小时。传播丢失了1-3米厚的薄膜，<micrn>薄膜厚度很小。与较低频率的损失进行比较，传播的磁性静态波的损失对较高频率的损失是相当大的。在2.3 GHz和6.4 GHz的情况下，损失为1.6和12.8 dB/cm。分散特性：4.5千兆赫的波浪，外部磁场为900 Oe.2。令人兴奋的是，微条线中磁性波的电是用分离法制造的，用光学学和用薄金纤维线进行银浆制造的。插入失去了这些激动人心的电子元件是小的。TE-TM模式光学转换是通过使用500毫瓦微波功率增强的微波设备在微波扫描发生器中产生的。0.98%光学转换在频率为2.25 GHz和外部磁场520 Oe时出现，波长为1.15 m.4的光学波段<micrn>。BiSubstitutututed Garnet Films Yield较大的Faraday效应，导致大型模式转换为微波磁静态波，与YIG Garnet Films进行比较。

1. Faraday effects of Garnet thin films for optical mode conversion devicesusing magneto-optic effects due to magneto-static waves must be large. Opticalpropagation losses and propagation losses of microwave magetostatic waves should be very small. It is found that propagation losses of magnetostatic waves in crystal films fabricated from amorphous film deposited on the substrate of 500゜C become very small, after annealing with the temperature 1000゜C and for 6 hours. Propagation losses of thick films with film thickness of 1-3 <micrn>m are small. Comparing with losses for lower frequencies, propagation losses ofmagnetostatic waves are very large for higher frequencies. Losses are 1.6 and 12.8 dB/cm for 2.3 GHz and 6.4 GHz, respectively. Dispersion characteristics give waves of 4.5 GHz with external magnetic field of 900 Oe.2. Excitation electrodes of magnetostatic waves in micro-strip lines are fabricated by sputtering method with optical lithography and silver paste with thin gold fiber lines. Insertion losses of these excitation electrodes are small.3. TE-TM mode optical conversions are accomplished by using 500 mW microwave power amplified by microwave devices from 5 mW generated in microwace sweepgenerator. 0.98 % optical conversion is obtained at the frequency 2.25 GHz and external magnetic field 520 Oe, for optical wacves of wavelength 1.15 <micrn>m.4. Bi Substituted garnet films yield large Faraday effects and lead large mode conversion due to microwave magento-static waves, comparing with YIG garnet films.