通过重新利用光电器件实现单次时间像素成像

Graphene Enabled Optoelectronics on Paper

The realization of optoelectronic devices on paper has been an outstanding challenge due to the large surface roughness and incompatible nature of paper with optical materials. Here, we demonstrate a new class of optoelectronic devices on a piece of printing paper using graphene as an electrically reconfigurable optical medium. Our approach relies on electro-modulation of optical properties of multilayer graphene on paper via blocking the interband electronic transitions. The paper based devices yield high optical contrast in the visible spectrum with fast response speed. Pattering graphene in…

利用非相干光实现低功耗可扩展多层光电神经网络

Low-power scalable multilayer optoelectronic neural networks enabled with incoherent light

本文提出一种多层光电计算框架，交替使用光学和光电层实现矩阵乘法和ReLU，通过LED和光电探测器阵列并行操作，实验以92%和86%的准确率识别MNIST图像和螺旋数据，显著减少数据读入读出，推动低功耗可扩展光学加速器发展。

Observation of Unidirectional Bound States in the Continuum Enabled by Topological Defects

Unidirectional radiation is important for a variety of optoelectronic applications. Many unidirectional emitters exist, but they all rely on the use of materials or structures that forbid outgoing waves, i.e. mirrors. Here, we theoretically propose and experimentally demonstrate a class of resonances in photonic crystal slabs, which only radiate towards a single side with no mirror placed on the other side - we call them ``unidirectional bound states in the continuum". These resonances are found to emerge when a pair of half-integer topological charges in the polarization field bounce into eac…

Cavity-Enabled Self-Electro-Optic Bistability in Silicon Photonics

We propose a new type of bistable device for silicon photonics, using the self-electro-optic effect within an optical cavity. Since the bistability does not depend on the intrinsic optical nonlinearity of the material, but is instead engineered by means of an optoelectronic feedback, it appears at low optical powers. This bistable device satisfies all the basic criteria required in an optical switch to build a scalable digital optical computing system.

基于紧凑μLED阵列的光电IGZO RRAM并行空间光子编程

Parallel Spatial Photonic Programming of Optoelectronic IGZO RRAM with a compact $μ$LED Array

该研究将μLED阵列与IGZO基ORRAM结合，实现并行空间光子编程，验证了其光电编程功能及渐逝记忆特性，为光学域神经形态技术应用提供支撑。

Regenerative oscillation and four-wave mixing in graphene optoelectronics

The unique linear and massless band structure of graphene, in a purely two-dimensional Dirac fermionic structure, have led to intense research spanning from condensed matter physics to nanoscale device applications covering the electrical, thermal, mechanical and optical domains. Here we report three consecutive first-observations in graphene-silicon hybrid optoelectronic devices: (1) ultralow power resonant optical bistability; (2) self-induced regenerative oscillations; and (3) coherent four-wave mixing, all at a few femtojoule cavity recirculating energies. These observations, in comparison…