Development of a Broadband Josephson Parametric Amplifier with Minimal Lithographic Complexity

Wei-Cheng Hung^1,2,3*, Jing-Yang Chang¹, Yu-Hsuan Hung¹, Yu-Chiun Chiu¹, Ssu-Yu Liu¹, Yong-Han Lin³, Yuan-Hann Chang², Yung-Fu Chen^1,3

¹Department of Physics, National Central University, Zhongli, Taiwan
²Institute of Physics, Academia Sinica, Taipei, Taiwan
³Taiwan Semiconductor Research Institute, National Institutes of Applied Research, Hsinchu, Taiwan

* Presenter:Wei-Cheng Hung, email:emc9716@gmail.com

We present the development of a broadband Josephson Parametric Amplifier (JPA) optimized for minimal fabrication complexity, enabling both rapid prototyping and scalable production. The amplifier is fully compatible with standard contact photolithography using a mask aligner.
Despite its simplified fabrication, the amplifier achieves 18 dB of gain across a 200 MHz bandwidth, with near quantum-limited noise performance. This balance of performance and practicality makes the design highly suitable for quantum readout and cryogenic signal amplification, especially in environments where fabrication resources are limited.

Keywords: superconducting quantum circuit , Josephson parametric Amplifier , Axion detection