Blue semiconductor nanocrystal laser
Abstract
We demonstrate tunable room-temperature amplified spontaneous emission and lasing from blue-emitting core-shell CdS∕ZnS nanocrystals (NCs) stabilized in a sol-gel derived silica matrix. Variable stripe length measurements show that these NC-silica composites have a modal gain of ∼100cm−1 at room temperature. Coating microspheres with a NC-silica composite film via a facile process resulted in uniform resonators that exhibit room-temperature lasing over long periods of continuous excitation. This work opens up a spectral window for emission tunable, microscale NC-based lasers.
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The effective bandgap of QDs and hence their photoluminescence can be tuned by either modifying their radius or their composition.
“As a result, the effective bandgap of QDs and hence their photoluminescence (PL) can be tuned by either modifying their radius [14] or the composition: CdS [15], CdSe [16], and CdTe [17] in the visible spectra and PbS [18], PbSe [19], and InAs [20] in the near infrared.”
From Polymer/QDs Nanocomposites for Waveguiding Applications (2012) · cites this paper as [15]
The emission wavelength can be tuned by changing the material forming the QDs and their size.
“In addition taking in account that the emission wavelength can be tuned by changing the material forming the QDs and their size [14][15][16][17][18][19][20], it has demonstrated the applications of colloidal QDs in LEDs technology [35].”
From Polymer/QDs Nanocomposites for Waveguiding Applications (2012) · cites this paper as [15]
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Jasieniak, J., Pacifico, J., Signorini, R., Chiasera, A., Ferrari, M., Martucci, A., & Mulvaney, P. (2007) · Advanced Functional Materials · doi:10.1002/adfm.200600955 · Cited by 79 · see citing works
Polymer/QDs Nanocomposites for Waveguiding Applications
Gordillo, H., Suárez, I., Abargues, R., Rodríguez-Cantó, P., Albert, S., & Martínez-Pastor, J. P. (2012) · Journal of Nanomaterials · doi:10.1155/2012/960201 · Cited by 49 · see citing works
“As a result, the effective bandgap of QDs and hence their photoluminescence (PL) can be tuned by either modifying their radius [14] or the composition: CdS [15], CdSe [16], and CdTe [17] in the visible spectra and PbS [18], PbSe [19], and InAs [20] in the near infrared.”
Background
- Authors
- Chan, Y., Steckel, J. S., Snee, P. T., Caruge, J.-M., Hodgkiss, J. M., Nocera, D. G., & Bawendi, M. G.
- Affiliations
- Massachusetts Institute of Technology (US)
- ORCID
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2005-02-07
- Volume
- 86
- Issue
- 7
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2070703615
- Cited by
- 175
- References
- 0
- Citations by year
- 2025: 2 · 2024: 6 · 2023: 2 · 2022: 7 · 2021: 4 · 2020: 5 · 2019: 2 · 2018: 8 · 2017: 8 · 2016: 7 · 2015: 6 · 2014: 9 · 2013: 11 · 2012: 17
- FWCI
- 7.73
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Physics Letters (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Quantum Dots Synthesis And Properties
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Solid State Laser Technologies
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence Properties of Advanced Materials
- Keywords
- quantum dots, blue laser, amplified spontaneous emission, core-shell nanocrystals, silica matrix, sol-gel, modal gain, microsphere resonators, tunable emission, room-temperature lasing
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