Open AccessCompact terahertz detector based on lightweight 3D‐printed lens packaging
Author(s) -
Qiao Haidong,
Liu Hao,
Mou Jinchao,
Liu Songzhuo,
Wang Bing,
Guo Dalu,
Lv Xin
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.1446
Subject(s) - detector , materials science , optoelectronics , terahertz radiation , responsivity , optics , schottky diode , noise equivalent power , antenna (radio) , lens (geology) , printed circuit board , radiation pattern , radiation , diode , physics , electrical engineering , photodetector , engineering
This Letter presents a compact and lightweight terahertz detector with a 3D‐printed lens packaging, exhibiting a high responsivity between 1100 and 2190 V/W from 210 to 230 GHz. The detector is comprised of an antenna‐coupled detector, a 3D‐printed lens and a read‐out circuit. The antenna‐coupled detector with a GaAs Schottky diode is printed on a dielectric laminate. To extract the detected signal more efficiently within a smaller footprint, a pair of folded lines with high impedance are designed. Moreover, a 3D‐printed nylon lens together with a back‐shorting reflector is proposed for radiation gain enhancement and mechanical robustness. A maximum voltage responsivity Rv of 2190 V/W and a minimum noise equivalent power of 2.6 pW/√Hz are achieved at 223 GHz. The measured radiation patterns agree well with the simulated results.