Single-Mode Lasing from a Monolithic Microcavity with Few-Monolayer-Thick Quantum Dot Films

Hyochul Kim; Kyung Sang Cho; Heejeong Jeong; Jineun Kim; Chang Won Lee; Weon Kyu Koh; Young Geun Roh; Sung Woo Hwang; Yeonsang Park

doi:10.1021/acsphotonics.6b00327

Single-Mode Lasing from a Monolithic Microcavity with Few-Monolayer-Thick Quantum Dot Films

Hyochul Kim, Kyung Sang Cho, Heejeong Jeong, Jineun Kim, Chang Won Lee, Weon Kyu Koh, Young Geun Roh, Sung Woo Hwang, Yeonsang Park^*

^*Corresponding author for this work

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

23 Citations (Scopus)

Abstract

We monolithically fabricated vertical cavity lasers with densely packed colloidal quantum dot films and demonstrated single-mode lasing operation using nanosecond optical excitation. Due to the accurate spectral and spatial alignment of the cavity optical modes and the quantum dot gains, in addition to the high quality factors of our devices, we observed lasing from a colloidal quantum dot gain medium only 35 nm thick (6 or 7 monolayers thick) with a threshold of 20 mJ/cm². We fabricated a laser with more numerous quantum dot layers as well, which exhibited a lower lasing threshold of 9 mJ/cm² due to the enhanced modal gain. This work represents an important step toward fabricating monolithic colloidal quantum dot lasers for practical photonic devices.

Original language	English
Pages (from-to)	1536-1541
Number of pages	6
Journal	ACS Photonics
Volume	3
Issue number	9
DOIs	https://doi.org/10.1021/acsphotonics.6b00327
Publication status	Published - 21 Sept 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

amplified spontaneous emission
colloidal quantum dots
microcavity
quantum dot laser
vertical cavity surface-emitting laser

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10.1021/acsphotonics.6b00327

Cite this

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title = "Single-Mode Lasing from a Monolithic Microcavity with Few-Monolayer-Thick Quantum Dot Films",

abstract = "We monolithically fabricated vertical cavity lasers with densely packed colloidal quantum dot films and demonstrated single-mode lasing operation using nanosecond optical excitation. Due to the accurate spectral and spatial alignment of the cavity optical modes and the quantum dot gains, in addition to the high quality factors of our devices, we observed lasing from a colloidal quantum dot gain medium only 35 nm thick (6 or 7 monolayers thick) with a threshold of 20 mJ/cm2. We fabricated a laser with more numerous quantum dot layers as well, which exhibited a lower lasing threshold of 9 mJ/cm2 due to the enhanced modal gain. This work represents an important step toward fabricating monolithic colloidal quantum dot lasers for practical photonic devices.",

keywords = "amplified spontaneous emission, colloidal quantum dots, microcavity, quantum dot laser, vertical cavity surface-emitting laser",

author = "Hyochul Kim and Cho, \{Kyung Sang\} and Heejeong Jeong and Jineun Kim and Lee, \{Chang Won\} and Koh, \{Weon Kyu\} and Roh, \{Young Geun\} and Hwang, \{Sung Woo\} and Yeonsang Park",

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

year = "2016",

month = sep,

day = "21",

doi = "10.1021/acsphotonics.6b00327",

language = "English",

volume = "3",

pages = "1536--1541",

journal = "ACS Photonics",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - Single-Mode Lasing from a Monolithic Microcavity with Few-Monolayer-Thick Quantum Dot Films

AU - Kim, Hyochul

AU - Cho, Kyung Sang

AU - Jeong, Heejeong

AU - Kim, Jineun

AU - Lee, Chang Won

AU - Koh, Weon Kyu

AU - Roh, Young Geun

AU - Hwang, Sung Woo

AU - Park, Yeonsang

PY - 2016/9/21

Y1 - 2016/9/21

N2 - We monolithically fabricated vertical cavity lasers with densely packed colloidal quantum dot films and demonstrated single-mode lasing operation using nanosecond optical excitation. Due to the accurate spectral and spatial alignment of the cavity optical modes and the quantum dot gains, in addition to the high quality factors of our devices, we observed lasing from a colloidal quantum dot gain medium only 35 nm thick (6 or 7 monolayers thick) with a threshold of 20 mJ/cm2. We fabricated a laser with more numerous quantum dot layers as well, which exhibited a lower lasing threshold of 9 mJ/cm2 due to the enhanced modal gain. This work represents an important step toward fabricating monolithic colloidal quantum dot lasers for practical photonic devices.

AB - We monolithically fabricated vertical cavity lasers with densely packed colloidal quantum dot films and demonstrated single-mode lasing operation using nanosecond optical excitation. Due to the accurate spectral and spatial alignment of the cavity optical modes and the quantum dot gains, in addition to the high quality factors of our devices, we observed lasing from a colloidal quantum dot gain medium only 35 nm thick (6 or 7 monolayers thick) with a threshold of 20 mJ/cm2. We fabricated a laser with more numerous quantum dot layers as well, which exhibited a lower lasing threshold of 9 mJ/cm2 due to the enhanced modal gain. This work represents an important step toward fabricating monolithic colloidal quantum dot lasers for practical photonic devices.

KW - amplified spontaneous emission

KW - colloidal quantum dots

KW - microcavity

KW - quantum dot laser

KW - vertical cavity surface-emitting laser

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:000384040900002

UR - https://openalex.org/W2460788353

UR - https://www.scopus.com/pages/publications/84988674502

U2 - 10.1021/acsphotonics.6b00327

DO - 10.1021/acsphotonics.6b00327

M3 - Journal Article

SN - 2330-4022

VL - 3

SP - 1536

EP - 1541

JO - ACS Photonics

JF - ACS Photonics

IS - 9

ER -

Single-Mode Lasing from a Monolithic Microcavity with Few-Monolayer-Thick Quantum Dot Films

Abstract

Bibliographical note

Keywords

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