Enhanced Multiphoton Processes in Perovskite Metasurfaces

被引：51

作者：

Fan, Yubin ^{[1
]}

Tonkaev, Pavel ^{[2
,3
]}

Wang, Yuhan ^{[1
]}

Song, Qinghai ^{[1
]}

Han, Jiecai ^{[4
]}

Makarov, Sergey, V ^{[2
]}

Kivshar, Yuri ^{[2
,3
]}

Xiao, Shumin ^{[1
,4
,5
]}

机构：

[1] Harbin Inst Technol Shenzhen, Shenzhen Grad Sch, Minist Ind & Informat Technol, Key Lab Micronano Optoelect Informat Syst, Shenzhen 518055, Peoples R China

[2] ITMO Univ, St Petersburg 197101, Russia

[3] Australian Natl Univ, Nonlinear Phys Ctr, Res Sch Phys, Canberra, ACT 2601, Australia

[4] Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Peoples R China

[5] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

来源：

NANO LETTERS | 2021年 / 21卷 / 17期

基金：

中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

multiphoton absorption; light-matter interaction; grating resonance; local field enhancement; DATA-STORAGE; EMISSION; DYNAMICS;

D O I：

10.1021/acs.nanolett.1c02074

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Multiphoton absorption and luminescence are fundamentally important nonlinear processes for utilizing efficient light-matter interaction. Resonant enhancement of nonlinear processes has been demonstrated for many nanostructures; however, it is believed that all higher-order processes are always much weaker than their corresponding linear processes. Here, we study multiphoton luminescence from structured surfaces and, combining multiple advantages of perovskites with the concept of metasurfaces, we demonstrate that the efficiency of nonlinear multiphoton processes can become comparable to the efficiency of the linear process. We reveal that the perovskite metasurface can enhance substantially two-photon stimulated emission with the threshold being comparable with that of the one-photon process. Our modeling of free-carrier dynamics and exciton recombination upon nonlinear photoexcitation uncovers that this effect can be attributed to the local field enhancement in structured media, a substantial increase of the mode overlap, and the selection rules of two-photon absorption in perovskites.

引用

页码：7191 / 7197

页数：7

共 38 条

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