Excitonic Emission of Monolayer Semiconductors Near-Field Coupled to High-Q Microresonators

被引：58

作者：

Javerzac-Galy, Clement ^{[1
]}

Kumar, Anshuman ^{[1
]}

Schilling, Ryan D. ^{[1
]}

Piro, Nicolas ^{[1
]}

Khorasani, Sina ^{[2
]}

Barbone, Matteo ^{[3
]}

Goykhman, Ilya ^{[3
]}

Khurgin, Jacob B. ^{[4
]}

Ferrari, Andrea C. ^{[3
]}

Kippenberg, Tobias J. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland

[2] Univ Vienna, Vienna Ctr Quantum Sci & Technol VCQ, A-1090 Vienna, Austria

[3] Univ Cambridge, Cambridge Graphene Ctr, Cambridge CB3 0FA, England

[4] Johns Hopkins Univ, Dept Elect & Comp Engn, Baltimore, MD 21218 USA

来源：

NANO LETTERS | 2018年 / 18卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

2D materials; whispering gallery mode resonator; electronic and optical properties; WSe2; transition metal dichalcogenides; 2-DIMENSIONAL MATERIALS; DYNAMICS; GRAPHENE; SILICA; LASERS; MONO; WS2;

D O I：

10.1021/acs.nanolett.8b00749

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present quantum yield measurements of single layer WSe2 (1L-WSe2) integrated with high-Q (Q > 10(6)) optical microdisk cavities, using an efficient (eta > 90%) near-field coupling scheme based on a tapered optical fiber. Coupling of the excitonic emission is achieved by placing 1L-WSe2 in the evanescent cavity field. This preserves the microresonator high intrinsic quality factor (Q > 10(6)) below the bandgap of 1L-WSe2. The cavity quantum yield is QY(c) approximate to 10(-3), consistent with operation in the broad emitter regime (i.e., the emission lifetime of 1L-WSe2 is significantly shorter than the bare cavity decay time). This scheme can serve as a precise measurement tool for the excitonic emission of layered materials into cavity modes, for both in plane and out of plane excitation.

引用

页码：3138 / 3146

页数：9

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