论文标题
通过杂化纳米antennas朝着亚微米尺寸的微型敏感的光电探测器
Miniaturizing Color-Sensitive Photodetectors via Hybrid Nanoantennas towards Sub-micron Dimensions
论文作者
论文摘要
数码相机传感器利用光电二极管上的颜色过滤器来达到颜色选择性。由于颜色过滤器和光敏硅层是单独的元素，因此这些传感器具有光学串扰，这将限制设置为最小像素尺寸。在本文中，我们报告了颜色过滤器和传感器之间零距离极限的混合硅氧纳米结构。该设计基本上可以实现亚微米像素尺寸，并最大程度地减少起源于倾斜照明的光学串扰。设计的混合硅铝纳米结构具有双重功能。至关重要的是，它支持磁性偶极子的杂化MIE与样本共振，以实现色彩吸收的吸收，从而产生电子孔对。同时，硅 - 铝界面形成了用于电荷分离和光电检测的Schottky屏障。这种设计可能有可能在超高像素密度下具有传统的摄像机传感器的传统染料过滤器，具有高级功能，可通过硅的间等离子等等离子等离子等级。
Digital camera sensors utilize color filters on photodiodes to achieve color selectivity. As color filters and photosensitive silicon layers are separate elements, these sensors suffer from optical cross-talk, which sets limits to the minimum pixel size. In this paper, we report hybrid silicon-aluminum nanostructures in the extreme limit of zero distance between color filters and sensors. This design could essentially achieve sub micron pixel dimensions and minimize the optical cross-talk originated from tilt illuminations. The designed hybrid silicon-aluminum nanostructure has dual functionalities. Crucially, it supports a hybrid Mie-plasmon resonance of magnetic dipole to achieve the color-selective light absorption, generating electron hole pairs. Simultaneously, the silicon-aluminum interface forms a Schottky barrier for charge separation and photodetection. This design could potentially replace the traditional dye based filters for camera sensors at ultra-high pixel densities with advanced functionalities in sensing polarization and directionality, as well as UV selectivity via interband plasmons of silicon.
