Nonlinear Photonic Crystal Nanocavities and Waveguides

非线性光子晶体纳米腔和波导

• 批准号: 0501402
• 负责人: Hyatt Gibbs
• 金额: $ 24万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-05-01 至 2009-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0501402&HistoricalAwards=false
• 关键词: Nonlinear; Photonic; Crystal; Nanocavities; Waveguides

Science and Engineering Goals: The research will be based on the previous-grant breakthrough of strong coupling between a single quantum dot and a photonic crystal slab nanocavity. Strong-coupling nanocavities are the natural nanotechnological limit for the shrinking size of LED's and VCSEL's. Device improvement (larger splitting-to-linewidth ratio) will be sought by increasing Q (by reducing the quantum dot density which introduces background absorption) and decreasing the dipole dephasing rate g (by pumping the dot resonantly into its ground or excited state). Also quantum dots will be grown at shorter wavelengths (1000nm) where quantum detectors and Ti:Sa lasers make quantum research easier. For these new truly quantum nanodevices to find applications in quantum information processing, they need to be more accessible to control pulses. The nanocavities will be coupled to photonic crystal waveguides so light can be coupled in and out efficiently via end-fire coupling or grating couplers. Waveguide coupling will accelerate the study of nanocavity nonlinear optical switching and bistability in transmission geometry and eventually will interconnect nanocavities to form rudimentary integrated optical circuits. Collaborations with Professors Scherer (Caltech) and Moloney (Arizona) who have photonic crystal computational capabilities will help to determine the tradeoff between vertical access and waveguide access and to interpret our experimental measurements. The long term goal is to utilize the strong coupling dot-photon entanglement to construct a quantum phase gate and to transfer a quantum state enabling the sharing of entanglement among spatially distant quantum dots.Broader Impact: The two graduate students (one African American) participating in this research project will gain experience with manipulating and nanopositioning semiconductor samples, resolution-limited optics, cw and fs laser spectroscopy, weak signal detection, quantum physics, etc. They will share their research results at international meetings and publish them in refereed and broad-audience journals. The nanophotonics industry benefits from the education of undergraduate and graduate students in the basic physics and experimental skills of nanodevices. This project will further solidify the productive collaboration with Axel Scherer's renowned photonic crystal fabrication group at Caltech. This research will lead to advances in the fundamental understanding of quantum optical devices and to technological progress in semiconductor nanodevices. Making the cavity smaller and smaller, increasing the Q, and optimizing the coupling are as important for quantum-dot photonic-crystal lasers as for devices designed around strong coupling.

科学和工程目标：该研究将基于先前获得的单量子点和光子晶体板纳米腔之间强耦合的突破。强耦合纳米腔是缩小 LED 和 VCSEL 尺寸的自然纳米技术限制。通过增加Q（通过降低引入背景吸收的量子点密度）和降低偶极子相移速率g（通过将点共振泵入其基态或激发态）来寻求器件改进（更大的分裂线宽比）。此外，量子点将在较短的波长（1000nm）下生长，其中量子探测器和 Ti:Sa 激光器使量子研究变得更加容易。为了让这些新的真正的量子纳米器件在量子信息处理中找到应用，它们需要更容易控制脉冲。纳米腔将耦合到光子晶体波导，因此光可以通过端射耦合或光栅耦合器有效地耦合输入和输出。波导耦合将加速纳米腔非线性光学开关和传输几何双稳定性的研究，并最终将纳米腔互连以形成基本的集成光学电路。与具有光子晶体计算能力的谢勒（加州理工学院）和莫洛尼（亚利桑那州）教授的合作将有助于确定垂直接入和波导接入之间的权衡，并解释我们的实验测量结果。长期目标是利用强耦合点-光子纠缠来构建量子相门并转移量子态，从而实现空间遥远的量子点之间共享纠缠。更广泛的影响：参与该研究项目的两名研究生（一名非裔美国人）将获得操纵和纳米定位半导体样品、分辨率有限光学、连续波和飞秒技术方面的经验 他们将在国际会议上分享他们的研究成果，并将其发表在有参考价值和广泛读者的期刊上。纳米光子学行业受益于本科生和研究生的纳米器件基础物理和实验技能教育。该项目将进一步巩固与加州理工学院 Axel Scherer 著名的光子晶体制造团队的富有成效的合作。这项研究将促进对量子光学器件的基本理解的进步以及半导体纳米器件的技术进步。使腔体变得越来越小、提高 Q 值以及优化耦合对于量子点光子晶体激光器和围绕强耦合设计的器件同样重要。