Sub-Wavelength Near-Field Metal Detection using an On-Chip Spintronic Technique
WANG Qi1,2, ZHU Xiao-Feng2, YUAN Xiao-Wen1, CHEN Chang-Qing1, LUO Xiang-Dong2**, ZHANG Bo2**
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074 2National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083
Abstract：A spintronic near-field microwave imaging system without vector network analyzers is used to detect the distribution of microwaves, which are scattered by a sub-wavelength periodical metal wire grating. An ultra thin metal body with diameter of 100 μm (λ/300) is observed by imaging illuminated by a 10 GHz shining source. An application with high sensitivity and resolution detection is proposed in the microwave region under a weak applied external static magnetic field.
2013, Vol. 30 
