Purcell Enhancement and Wavelength Shift of Emitted Light by CsPbI3 Perovskite Nanocrystals Coupled to Hyperbolic Metamaterials,ACS Photonics

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Purcell Enhancement and Wavelength Shift of Emitted Light by CsPbI3 Perovskite Nanocrystals Coupled to Hyperbolic Metamaterials
ACS Photonics ( IF 6.5 ) Pub Date : 2020-10-26 , DOI: 10.1021/acsphotonics.0c01219
Hamid Pashaei Adl ₁ , Setatira Gorji ₁ , Mojtaba Karimi Habil ₂ , Isaac Suárez _{1,

3} , Vladimir S. Chirvony ₁ , Andrés F. Gualdrón-Reyes ₄ , Iván Mora-Seró ₄ , Luisa M. Valencia ₅ , María de la Mata ₅ , Jesús Hernández-Saz ₆ , Sergio I. Molina ₅ , Carlos J. Zapata-Rodríguez ₇ , Juan P. Martínez-Pastor ₁

Affiliation

Manipulation of the exciton emission rate in nanocrystals of lead halide perovskites (LHPs) was demonstrated by means of coupling of excitons with a hyperbolic metamaterial (HMM) consisting of alternating thin metal (Ag) and dielectric (LiF) layers. Such a coupling is found to induce an increase of the exciton radiative recombination rate by more than a factor of three due to the Purcell effect when the distance between the quantum emitter and HMM is nominally as small as 10 nm, which coincides well with the results of our theoretical analysis. Besides, an effect of the coupling-induced long wavelength shift of the exciton emission spectrum is detected and modeled. These results can be of interest for quantum information applications of single emitters on the basis of perovskite nanocrystals with high photon emission rates.

中文翻译：

CsPbI ₃钙钛矿纳米晶体与双曲线超材料耦合的赛尔增强和发射光的波长偏移。

通过将激子与由交替的薄金属（Ag）和电介质（LiF）层组成的双曲线超材料（HMM）耦合，证明了对卤化钙钛矿（LHPs）纳米晶体中激子发射速率的操纵。当量子发射体和HMM之间的距离标称地小到10 nm时，由于珀塞尔效应，发现这种耦合会导致激子辐射复合率增加三倍以上，这与结果十分吻合我们的理论分析。此外，对激子发射光谱的耦合引起的长波长偏移的影响进行检测和建模。这些结果对于基于具有高光子发射速率的钙钛矿纳米晶体的单个发射器的量子信息应用可能是有意义的。

更新日期：2020-11-18

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