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

本研究的目的是设计，外延生长，制造，表征和分析光泵浦和电注入亚波长纳米级卷起In（Ga）As量子点1.3μm激光器，可以在室温下显示超低阈值（100μA）。 量子点隧穿注入异质结在纳米激光器中所具有的大增益、低阈值和高量子效率等优点也将被研究。这项研究的变革性影响是一个低功率和紧凑的激光器的互连和spectroscopic.Intellectual MeritThe智力价值是第一次演示的纳米级卷起的亚波长大小的激光器砷化镓，可以光或电泵浦。在GaAs/InP上实现可靠的室温纳米激光器也具有变革性，被认为是光电子学的里程碑。 卷起的技术和相关的设备制造比目前正在探索的纳米激光器的其他技术更简单。更广泛的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。 该计划的跨学科性质将为研究生和本科生提供一个很好的培训基地-我们在几个关键领域的未来工作力量。 在光电子和照明的一般领域的夏季方案中对妇女和代表性不足的少数民族进行培训将是一个优先事项。 K-12的推广活动将包括参观期间的演示，并为科学和数学创造更广泛的认识。

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.