新加坡南洋理工大学熊启华教授来我组访问
发布时间：2014-06-11
点击次数：
- 发布时间：
- 2014-06-11
- 文章标题：
- 新加坡南洋理工大学熊启华教授来我组访问
- 内容：
- 应西安交通大学理学院方吉祥教授邀请，新加坡南洋理工大学熊启华教授访问我院，并作学术报告。
报告题目： From Nanomaterials to Bulk Crystals: Expanding the Laser Cooling Toolbox for Optical Refrigeration报告人： Qihua Xion g时间： 2014 年 5 月 23 日（周五）上午 10:30地点：中一楼 3113报告摘要：
Optical irradiation accompanied by spontaneous anti-Stokes emission can lead to cooling of matter, a phenomenon known as laser cooling or optical refrigeration proposed in 1929 by Peter Pringsheim.
In solid state materials, the cooling is achieved by annihilation of lattice vibrations (i.e., phonons). Since the first experimental demonstration in rare-earth doped glasses, considerable progress has been made particularly in ytterbium-doped glasses or crystals with a recent record of ~110 K cooling from ambient, surpassing the thermoelectric Peltier cooler. Rare-earth doped materials remain to be the only candidate in the toolbox of laser cooling for the past few decades until our recent discovery in the laser cooling of group II-VI semiconductors CdS in nanobelt morphology. We demonstrate that CdS nanoribbons can be laser cooled by 40 Kelvin from room temperature, pumped by 514 nm green lasers with a cooling efficiency of ~ 4.8%. This talk will present the background of laser cooling of solids, and our recent progress in searching bulk and scalable materials particularly in bulk II-VI semiconductors and organic-inorganic perovskite thin films for laser cooling towards next generation optical refrigeration applications, which have great promises in the field of cryogenics with the advantage of compactness, vibration- and cryogen-free, high reliability and direct integrability into nanoscale electronic and photonic devices.
报告人介绍 ：
熊启华
，
1997
年武汉大学物理系本科毕业，
2000
年中国科学院上海应用物理所硕士毕业，
2006
美国宾夕法尼亚州立大学获得博士毕业。
2006-2009
年在哈佛大学
Charles Lieber
小组做博士后研究。
2009
年获新加坡国立研究基金
NRF Fellowship
资助加盟南洋理工大学。
2014
年聘任终身教职，现为数理科学学院和电机及电子工程学院双聘南洋副教授和新加坡国立研究基金研究员。
主要从事半导体纳米材料光学和电学性质研究，研究方向包括发光特性剪裁及动力学，纳米激光器，激子 - 表面等离子体相互作用，低维纳米体系的声子以及电声耦合以及低维纳米材料的热电复合材料。最近，在 II-VI 簇半导体材料发现了光学声子辅助的共振荧光上转换现象，实现了激光制冷半导体的突破。现发表与接收期刊论文 90 余篇，在 Nature (1 篇 , 封面 ) ， Nature Nanotechnology (1 篇 , 封面 ) ， PNAS (1 篇 ) ， Nano Letters (27 篇 ) ， ACS Nano (11 篇 ), Nanoscale (7 篇 ) ， Phys. Rev. B (5 篇 ) ， Adv. Mater. (3 篇 ) ， Adv. Funct. Mater. (1 篇 ), Optics Express (2 篇 ) 。论文被 SCI 引用 1900 余次 (H-index=27) 。