Nanoscale (Sub-Wavelength) Rolled-Up Quantum Dot Lasers

本研究的目的是设计、外延生长、制作、表征和分析光泵浦和电注入的亚波长卷积型In(Ga)As量子点1.3µm激光器，以实现室温下的超低阈值(100µA)。研究了量子点隧道注入异质结在纳米级激光运转中所具有的高增益、低阈值、高量子效率等固有优势。这项研究的变革性影响是为互连和光谱提供了一种低功率和紧凑的激光器。智能价值智能的优点是首次在GaAs上展示了纳米级卷起的亚波长尺寸的激光，可以光或电抽运。在GaAs/InP上展示了可靠的室温纳米激光器也是一项革命性的工作，被认为是光电子学的一个里程碑。与目前正在探索的其他纳米级激光技术相比，卷起的技术和相关的器件制造更加简单。广泛影响拟议研究的更广泛的影响包括社会、经济和教育效益。超低功率光源降低了能源消耗，有助于以更快的速度高效地传输信息。该项目的跨学科性质将为研究生和本科生提供一个极好的培训基础--我们未来在几个关键领域的工作。在光电子和照明等一般领域的暑期项目中，对妇女和代表性不足的少数民族进行培训将是优先事项。K-12的外展活动将包括在访问期间进行演示，以及培养更广泛的科学和数学意识。

ObjectiveThe objective of this research is to design, epitaxially grow, fabricate, characterize, and analyze optically pumped and electrically injected subwavelength nanoscale rolled-up In(Ga)As quantum dot 1.3µm lasers that can demonstrate ultra low threshold ( 100µA) at room temperature. The inherent advantage offered by quantum dot tunnel injection heterostructure for nanoscale laser operation, such as large gain, low threshold and high quantum efficiency will also be investigated. The transformative impact of this research is the availability of a low power and compact laser for interconnects and for spectroscopy.Intellectual MeritThe intellectual merit is the first demonstration of nanoscale rolled-up subwavelength sized laser on GaAs, that can be optically or electrically pumped. Demonstration of a reliable room temperature nanoscale laser on GaAs/InP is also transformative and is considered as a milestone in optoelectronics. The rolled-up technique and associated device fabrication are more simple than other techniques for nanoscale lasers that are currently being explored.Broader ImpactsThe broader impacts of the proposed research include social, economic and educational benefits. Ultra-low power light sources reduce energy consumption and help in transmitting information efficiency and at faster rates. The interdisciplinary nature of the program will provide an excellent training ground for graduate and undergraduate students - our future work force in several critical areas. Training of women and underrepresented minorities in summer programs in the general areas of optoelectronics and lighting will be a priority. K-12 outreach will include demonstrations during visits and creating a broader awareness for science and mathematics.