Yu-Jung Lu1
Academia Sinica1
Progress in understanding resonant subwavelength optical structures has fueled a worldwide explosion of interest in both fundamental processes and nanophotonic/plasmonic devices for imaging, sensing, solar energy conversion, and information processing. However, plasmonic platforms in the visible region with robust, high performance, thermo-stable, and low-cost remains remain unexplored. In this presentation, I will particularly discuss emerging plasmonic platforms based on transition metal nitrides. I will present an overview of my research works over the past five years on the plasmon-enhanced light-matter interactions in the visible regions and its applications [1-6], including the plasmonic nanolasers [1-2], tunable plasmonic modulators [3], plasmonic phototransistors [4], plasmon-enhanced solar energy harvesting [5], and the refractory plasmonic colors for back-light free displays [6]. My group discovered several unique working mechanisms that utilize plasmonic nanostructures to improve optoelectronic device performance. By engineering the local electromagnetic field confinement, the light-matter interaction strength can be enhanced, which results in efficient energy conversion in the designed nanosystem. The detailed mechanisms and possible applications will be discussed. These results have broad implications for the use of plasmonic crystals/metasurfaces in high-performance optoelectronic devices with efficient energy conversion.<br/><br/><b>References</b><br/>[1]. Y-H Hsieh, B-W Hsu, K-N Peng, K-W Lee, C W Chu, S-W Chang, H-W Lin*, T-J Yen*, and <b><u>Y-J Lu</u></b>*, Perovskite Quantum Dot Lasing in a Gap-Plasmon Nanocavity with Ultralow Threshold, <i>ACS Nano</i> <b>14</b>, 11670 (2020). (Issue cover)<br/>[2]. <b><u>Y-J Lu</u></b>*, T L Shen, K-N Peng, P-J Cheng, S-W Chang, M-Y Lu, C W Chu, T-F Guo, H. Atwater*, Upconversion Plasmonic Lasing from an Organolead Trihalide Perovskite Nanocrystal with Low Threshold. <i>ACS Photonics</i> <b>8</b>,335–342 (2021).<br/>[3]. <b><u>Y-J Lu</u></b>, R. Sokhoyan, W-H Cheng, G. Kafaie Shirmanesh, A. Davoyan, R. A. Pala, K. Thyagarajan, and H. A. Atwater*, Dynamically Controlled Purcell Enhancement of Visible Spontaneous Emission in a Gated Plasmonic Heterostructure, <i>Nature Communications</i><b> 8</b>, 1631 (2017).<br/>[4]. H-Y Lan, Y-H Hsieh, Z-Y Chiao, D. Jariwala, M-H Shih, T-J Yen, O. Hess, and <b><u>Y-J Lu</u></b>*, Gate-Tunable Plasmon-Enhanced Photodetection in a Monolayer MoS<sub>2</sub> Phototransistor with Ultrahigh Photoresponsivity. <i>Nano Lett.</i><b> 21</b>, 3083 (2021).<br/>[5]. M-J Yu, C-L Chang, H-Y Lan, Z-Y Chiao, Y-C Chen, H W H. Lee, Y-C Chang, S-W Chang, T. Tanaka, V. Tung, H-H Chou*, and <b><u>Y-J Lu</u></b>*, Plasmon-Enhanced Solar-Driven Hydrogen Evolution Using Titanium Nitride Metasurface Broadband Absorbers. <i>ACS Photonics</i> <b>8</b>, 3125–3132 (2021).<br/>[6] Z-Y Chiao, Y-C Chen, J-W Chen, Y-C Chu, J-W Yang, T-Y Peng, W-R Syong, H W H. Lee, S-W Chu, and <b><u>Y-J Lu</u></b>*, Full-Color Generation Enabled by Refractory Plasmonic Crystals. Nanophotonics 11, 2891-2899 (2022)