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

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

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

Keywords

2D materials
WSe
WSe2
electronic and optical properties
transition metal dichalcogenides
whispering gallery mode resonator

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.8b00749

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@article{31eceebac47049f6a1be4220c8cc8f54,

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, WSe2, 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 = "الإنجليزيّة",

volume = "18",

pages = "3138--3146",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "5",

}

TY - JOUR

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 - WSe2

KW - electronic and optical properties

KW - transition metal dichalcogenides

KW - whispering gallery mode resonator

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U2 - 10.1021/acs.nanolett.8b00749

DO - 10.1021/acs.nanolett.8b00749

M3 - مقالة

C2 - 29624396

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

Keywords

All Science Journal Classification (ASJC) codes

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