Three-Dimensional Plasmonically Enhanced Nanopillar Photodetectors: An Integrative Design Approach

目的：研究等离子体增强光电探测器（PEPDs）的设计与研制。一种独特的3D等离子体光栅自对准图像化III-V纳米柱阵列，可以提高效率和速度，适合在Si CMOS平台上集成高带宽收发器。预期器件性能包括70%的量子效率和50 GHz的调制速率。智力优势：创新的组件是独特的三维几何形状，由垂直纳米柱为基础的格式，绕过平面等离子体和纳米结构的两个主要限制。与传统的平面结构相比，这种等离子体光栅提供了明显提高的光耦合效率，这是由于光子热点的紧密限制。此外，这些热点可以物理地放置在载流子吸收区而不是有损耗的金属光栅上重叠。更广泛的影响：该研究项目为学生提供了大量的参与机会，包括高中、本科和研究生/博士后教育和研究经历。该项目与K-12项目相关，如“技术路演”（Technology Road Show），该项目将研究生开发的纳米和清洁能源实验引入当地高中的科学课程。一个相关的项目每月邀请高中教师到加州大学洛杉矶分校校园开发与纳米相关的课程。少数族裔学生通过有针对性的校园支持来参与加州大学洛杉矶分校的本科和研究生项目。

Objective: This project is an integrated approach for design and development of plasmonically-enhanced photodetectors (PEPDs). A unique 3D plasmonic grating self-aligned to a patterned III-V nanopillar array enables enhanced efficiency along with speed appropriate for high-bandwidth transceiver integration on a Si CMOS platform. Expected device performance includes quantum efficiencies 70 % and modulation rates 50 GHz. Intellectual merit: The innovative component is the unique three-dimensional geometry enabled by the vertical nanopillar-based format to circumvent two major limitations of planar plasmonics and nanostructures. This plasmonic grating provides significantly increased optical coupling efficiency resulting from tightly-confined photonic hot-spots compared to the conventional planar configuration. In addition, these hot spots can be physically placed to overlap the carrier absorbing region rather than the lossy metal grating. A holisticBroader Impacts: This research project offers substantial opportunities for student participation at all levels including high-school, undergraduate and graduate/postdoctoral education and research experience. The project is linked to K-12 projects such as Technology Road Show which takes nano- and clean-energy experiments developed by graduate students into local high school science classes. A related program brings high school teachers on UCLA campus monthly to develop nano-related course work. Under represented minority students participate in these UCLA laboratories through targeted campus support of undergraduate and graduate programs.