| Time：1131002 (Wed.) 14:20~16:20 Speaker：Prof.周昱薰(Chou, Yu-Hsun) 國立成功大學光電科學與工程學系/Department of Photonics, National Cheng Kung University Title：Substrate-Free Fabrication Methods for Surface Plasmon Nanolaser Applications Abstract：Surface plasmon effects offer a powerful way to confine electromagnetic energy into extremely small volumes, creating resonant cavities that can act as efficient sources of coherent light at the subwavelength scale. Nanoshell-based plasmonic lasers have been explored for their ability to detect mesoscopic structures within cells. However, their high plasmon dephasing rates increase energy thresholds and complicate electrical excitation, which limits their use in optoelectronic integration. An alternative design involves a propagating surface plasmon laser built on a planar semiconductor-insulator-metal configuration. This design allows for the efficient propagation of plasmons along nanowires and supports electrical excitation. Although this approach improves energy guidance in optoelectronic circuits, the reliance on a supporting substrate increases the overall device size, making it less suitable for micro/nanoscale integration, particularly in biological applications. To address these limitations, we developed a substrate-free surface plasmon polariton laser. By eliminating the need for a supporting substrate and ensuring direct contact between the film and air, we significantly reduced the energy threshold while maintaining functionality across various surfaces. This advancement paves the way for more compact and efficient plasmonic devices suitable for micro/nano-scale optoelectronic applications. Place：B101, Gongguan Campus, NTNU |
