Development of passive millimeter-wave microscopy

在这项研究项目中，被动毫米波显微镜能够对空间分辨率低于衍射极限的样品发出的热辐射进行成像，以展示这种显微镜形式在低温下的成像能力。这项技术利用灵敏的辐射接收器和扫描近场显微镜相结合。在50 GHz(波长：6 mm)不同样品温度下进行的实验表明，即使在红外被动成像系统无效的低温范围内，我们的被动毫米波显微镜系统也可以成功地对热辐射进行成像。

In this research project, passive millimeter-wave microscopy that enables imaging of the thermal radiation emitted from a sample with a spatial resolution below the diffraction limit is investigated to demonstrate the imaging capability of this microscopy format at low temperatures. This technique utilizes a sensitive radiometric receiver in combination with a scanning near-field microscope. Experiments performed at 50 GHz （wavelength: 6 mm) at various sample temperatures show that our passive millimeter-wave microscope system can successfully image thermal radiation even in the low temperature range where passive imaging systems in the infrared region are ineffective.