대학원생 구두발표(토론I): 차세대 분자전자소자를 위한 고분자 기술
[OD1-4]
우수논문발표상 응모자High-performance plasmonic nanogap organic photodetectors enabling monolithic waveguide coupling for on-chip integrated photonics
발표자김단비 (한국과학기술연구원)
연구책임자임정아 (한국과학기술연구원)
Abstract
Organic photodetectors (OPDs) offer molecular tunability and solution processability, yet their direct integration into photonic integrated circuits (PICs) remains largely unexplored. PICs route and process optical signals on-chip using sub-micrometer waveguides for communication and sensing. Here, we present a plasmonic nanogap OPD with coplanar electrodes, in which a bulk heterojunction is infiltrated into a nanoscale channel. The nanogap electrodes are fabricated using adhesion lithography, enabling scalable large-area patterning in a 32 × 32 array format. The device exhibits a strong near-infrared photoresponse with high-performance photodetection in an extremely confined active area, originating from plasmonic field enhancement and trap-assisted photomultiplication. Furthermore, a polymer waveguide is patterned above the nanogap, enabling guided-light detection. These results demonstrate plasmonic nanogap OPDs as waveguide-integrated detectors for on-chip photonic systems.