報(bào)告題目：PerovLight: Perovskite Materials for Emergent Nanophotonics and Polaritonics
報(bào)告人：熊啟華教授
報(bào)告時(shí)間：2019年6月6日（星期四）下午2:00
報(bào)告地點(diǎn)：長(zhǎng)安校區(qū)啟翔樓233會(huì)議室
邀請(qǐng)人：官操教授
承辦學(xué)院：柔性電子研究院
聯(lián)系電話(huà)：8846-0889
報(bào)告摘要：
Halide perovskites have recently attracted tremendous attention due to their remarkable properties as an optical gain material, which have shown high performance in solar cells, light-emitting diodes, photodetectors and many other optoelectronic applications. In this talk, I will first review our recent progress in the investigation of halide perovskite materials as excellent optical gain materials, which can be synthesized by either physical or chemical ways. Steady-state and transient spectroscopy approaches can elaborate the large exciton binding energy higher than room temperature thermal excitation energy, and exciton dynamics. High crystalline quality supports the optically pumped photonic lasing based on the intrinsic whispering gallery mode cavity, while the lasing quality factor can be as high as 5000 in all-inorganic perovskite crystals. Next, I will present our experimental realization of room-temperature polariton lasing in all-inorganic cesium lead chloride perovskite crystals embedded in two distributed Bragg reflectors. The perovskite crystals possess efficient polariton-polariton scattering due to the Wannier-Mott exciton nature with large binding energy. The polariton lasing is evidenced by a superlinear power dependence, macroscopic ground state occupation, and increase of the temporal coherence. Finally, we will present our recent results of manipulating polariton Bose-Einstein condensate in one-dimensional perovskite waveguide and lattices, opening a new venue towards room temperature quantum fluids of light and quantum optics.
Key words:Halide Perovskites, Exciton Polariton, Spontaneous coherence, Polariton Laser, Polariton Bose-Einstein Condensate.
References:
1.R. Suet al., “Room temperature one-dimensional polariton condensate propagation in lead halide perovskites”,Science Advances, DOI: 10.1126/sciadv.aau0244 (2018)
2.K.B. Linet al., “Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent”,Nature562, 245-248 (2018)
3.J. Xinget al., “Color-stable highly luminescent sky-blue perovskite light-emitting diodes”Nature Communications, DOI: 10.1038/s41467-018-05909-8 (2018)
4.G.K. Longet al., “Spin control in reduced-dimensional chiral perovskites”,Nature Photonics12, 528-533 (2018)
5.F. Yan,et al., “Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes”,Nano Lett.18, 3157-3164 (2018)
6.R. Suet al., “Room temperature polariton lasing in all-inorganic perovskite”,Nano Lett.17, 3982–3988 (2017)
7.Q. Zhang,et al., “High quality whispering-gallery-mode lasing from cesium lead halide perovskite nanoplatelets”,Adv. Funct. Mater. 26, 6238-6245 (2016)
8.Q. Zhang,et al., “Room-temperature near-infrared high-Q perovskite whispering-gallery planar nanolasers”,Nano Lett.14, 5995-6001 (2014)
報(bào)告人簡(jiǎn)介：
熊啟華是南洋理工大學(xué)數(shù)理科學(xué)學(xué)院和電氣電子工程學(xué)院雙聘教授。美國(guó)物理學(xué)會(huì)會(huì)士。1997年本科畢業(yè)于武漢大學(xué)物理系，2000年從上海應(yīng)用物理研究所獲得碩士學(xué)位，2006年于賓夕法尼亞州立大學(xué)獲得博士學(xué)位，師從Peter C. Eklund教授。2006-2009年在哈佛大學(xué)Charles Lieber研究組從事博士后研究。2009年初獲得新加坡國(guó)立研究基金研究員項(xiàng)目資助并于當(dāng)年6月加入南洋理工大學(xué)，任南洋助理教授。2014年獲得終身教職，2016年升正教授。2014-2019年間擔(dān)任數(shù)理科學(xué)學(xué)院副院長(zhǎng)。熊啟華教授的主要研究領(lǐng)域是以穩(wěn)態(tài)和瞬態(tài)光譜學(xué)為主要實(shí)驗(yàn)手段，以光和物質(zhì)相互作用為研究主題,著重研究低維半導(dǎo)體納米材料基于光子-聲子-電子耦合作用的物理機(jī)制和量子調(diào)控。他在納米光子學(xué)和表面等離子體學(xué)，激光制冷，以及二維半導(dǎo)體材料光學(xué)性質(zhì)等一系列前沿課題做出了一系列有影響的工作。在《自然》及子刊,《科學(xué)-進(jìn)展》，《納米通訊》，《先進(jìn)材料》等一系列國(guó)際知名雜志上發(fā)表了200多篇文章，并被世界知名雜志及大眾媒體所報(bào)道，總引用次數(shù)超過(guò)10000次，H-因子59。其出色的研究獲得了一些獎(jiǎng)勵(lì)和認(rèn)可，比如新加坡物理學(xué)會(huì)納米科技獎(jiǎng)（2015），新加坡國(guó)立研究基金NRF Investigatorship獎(jiǎng)（2014），和南洋理工大學(xué)南洋研究卓越獎(jiǎng)（2014）等。2018年4月起，擔(dān)任美國(guó)光學(xué)學(xué)會(huì)旗艦雜志《Optics Express》副主編。2018年12月起，擔(dān)任Wiley信息材料領(lǐng)域新創(chuàng)刊雜志《InfoMat》的副主編。
