高温超导YBCO微桥用于3mm波检测

Use of High T c Superconducting YBCO Microbridge for Detection of Wavelength 3mm

超导微桥结具有灵敏度高、噪声低的特点。研制的１０×２０μｍ２微桥结构高温超导探测器，５００Ｋ黑体的性能达到响应率Ｒ＝８．９×１０４ＶＷ－１，探测率Ｄ＊＝４．５×１０１０ｃｍＨｚ１／２Ｗ－１。用它先后完成了亚毫米波和毫米波的检测。３ｍｍ波长辐射的响应率Ｒ＝６．０１×１０２Ｖ／Ｗ，探测率Ｄ＊＝６．１×１０８ｃｍＨｚ１／２Ｗ－１。对开发利用具有较深远的影响。

Superconducting microbridge has high sensitivity and low noise. We have successfully developed High T c superconducting detector of microbridge structure with area of 10×20μm. At 500K, its responsitivity is R=8.9×10 4VW -1 ,the detectivity D * is 4.5×10 10 cmHz 1/2 W -1 .Using such a detector, We have detected submillimeter wave and millimeter wave. For wavelength of 3mm. the achieved responsitivity R is 6.01 ×10 2VW -1 and detectivity D * is 6.1×10 8cmHz 1/2 W -1 . Our work has opened a new way to use this kind of detector.