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

Clément Javerzac-Galy; Anshuman Kumar; Ryan D. Schilling; Nicolas Piro; Sina Khorasani; Matteo Barbone; Ilya Goykhman; Jacob B. Khurgin; Andrea C. Ferrari; Tobias J. Kippenberg

doi:10.1021/acs.nanolett.8b00749

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

Clément Javerzac-Galy
, Anshuman Kumar
, Ryan D. Schilling
, Nicolas Piro
, Sina Khorasani
, Matteo Barbone
, Ilya Goykhman
, Jacob B. Khurgin
, Andrea C. Ferrari
, Tobias J. Kippenberg^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Abstract

We present quantum yield measurements of single layer WSe₂ (1L-WSe₂) integrated with high-Q (Q > 10⁶) optical microdisk cavities, using an efficient (η > 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 > 10⁶) below the bandgap of 1L-WSe₂. The cavity quantum yield is QY_c ≈ 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.

Original language	English
Pages (from-to)	3138-3146
Number of pages	9
Journal	Nano Letters
Volume	18
Issue number	5
DOIs	https://doi.org/10.1021/acs.nanolett.8b00749
State	Published - 9 May 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 American Chemical Society.

Keywords

2D materials
WSe
electronic and optical properties
transition metal dichalcogenides
whispering gallery mode resonator

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10.1021/acs.nanolett.8b00749

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title = "Excitonic Emission of Monolayer Semiconductors Near-Field Coupled to High-Q Microresonators",

abstract = "We present quantum yield measurements of single layer WSe2 (1L-WSe2) integrated with high-Q (Q > 106) optical microdisk cavities, using an efficient (η > 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 > 106) below the bandgap of 1L-WSe2. The cavity quantum yield is QYc ≈ 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.",

keywords = "2D materials, WSe, electronic and optical properties, transition metal dichalcogenides, whispering gallery mode resonator",

author = "Cl{\'e}ment Javerzac-Galy and Anshuman Kumar and Schilling, \{Ryan D.\} and Nicolas Piro and Sina Khorasani and Matteo Barbone and Ilya Goykhman and Khurgin, \{Jacob B.\} and Ferrari, \{Andrea C.\} and Kippenberg, \{Tobias J.\}",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

month = may,

day = "9",

doi = "10.1021/acs.nanolett.8b00749",

language = "אנגלית",

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journal = "Nano Letters",

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T1 - Excitonic Emission of Monolayer Semiconductors Near-Field Coupled to High-Q Microresonators

AU - Javerzac-Galy, Clément

AU - Kumar, Anshuman

AU - Schilling, Ryan D.

AU - Piro, Nicolas

AU - Khorasani, Sina

AU - Barbone, Matteo

AU - Goykhman, Ilya

AU - Khurgin, Jacob B.

AU - Ferrari, Andrea C.

AU - Kippenberg, Tobias J.

PY - 2018/5/9

Y1 - 2018/5/9

N2 - We present quantum yield measurements of single layer WSe2 (1L-WSe2) integrated with high-Q (Q > 106) optical microdisk cavities, using an efficient (η > 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 > 106) below the bandgap of 1L-WSe2. The cavity quantum yield is QYc ≈ 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.

AB - We present quantum yield measurements of single layer WSe2 (1L-WSe2) integrated with high-Q (Q > 106) optical microdisk cavities, using an efficient (η > 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 > 106) below the bandgap of 1L-WSe2. The cavity quantum yield is QYc ≈ 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.

KW - 2D materials

KW - WSe

KW - electronic and optical properties

KW - transition metal dichalcogenides

KW - whispering gallery mode resonator

UR - https://www.scopus.com/pages/publications/85046627865

U2 - 10.1021/acs.nanolett.8b00749

DO - 10.1021/acs.nanolett.8b00749

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C2 - 29624396

AN - SCOPUS:85046627865

SN - 1530-6984

VL - 18

SP - 3138

EP - 3146

JO - Nano Letters

JF - Nano Letters

IS - 5

ER -

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

Abstract

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Keywords

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