Room-Temperature Lasing in Self-Assembled Micro-Rings of CdSe/ZnS Quantum Dots
Colloidal quantum dots (QDs) provide an ideal platform for the development of integrated optoelectronic devices due to their excellent solution processability and size-tunable optical properties. In this paper, we investigate the self-assembly process of QD micro-rings based on the solution patterni...
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2025-05-01
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| author | Xiaoyu Wang Zelei Chen Haibin Zhao Jun Wang |
| author_facet | Xiaoyu Wang Zelei Chen Haibin Zhao Jun Wang |
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| description | Colloidal quantum dots (QDs) provide an ideal platform for the development of integrated optoelectronic devices due to their excellent solution processability and size-tunable optical properties. In this paper, we investigate the self-assembly process of QD micro-rings based on the solution patterning method and the lasing phenomenon in the micro-rings. The characterization of the QD micro-rings demonstrates that they possess a high-quality morphological structure and excellent optical properties. The photoluminescence spectra of the QD micro-rings with different pump fluences are studied, and photon lasing with a narrow linewidth (0.3 nm) is found to have been achieved in the micro-rings above the threshold (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>23</mn><mo> </mo><mi mathvariant="sans-serif">μ</mi><mrow><mi mathvariant="normal">J</mi><mo> </mo><mi mathvariant="normal">c</mi></mrow><msup><mrow><mi mathvariant="normal">m</mi></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula>). The high coherence of the lasing in the QD micro-rings is revealed by angle-resolved photoluminescence (ARPL) spectra at room temperature. Moreover, the interference pattern of the coherent lasing obtained with Young’s double-slit interference method based on the far-field Fourier optical system in the ARPL spectrum reflects the distribution of the optical field in the QD micro-rings. Our research on the self-assembly of colloidal QDs and the lasing of QD micro-rings is expected to further promote the development of on-chip integrated QD optoelectronic devices. |
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| spelling | doaj-art-813c1f7c372549a2b86e75ffdb52cbfb2025-08-20T02:33:55ZengMDPI AGPhotonics2304-67322025-05-0112547710.3390/photonics12050477Room-Temperature Lasing in Self-Assembled Micro-Rings of CdSe/ZnS Quantum DotsXiaoyu Wang0Zelei Chen1Haibin Zhao2Jun Wang3Key Laboratory of Micro & Nano Photonic Structures, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, ChinaKey Laboratory of Micro & Nano Photonic Structures, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, ChinaKey Laboratory of Micro & Nano Photonic Structures, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, ChinaKey Laboratory of Micro & Nano Photonic Structures, Department of Optical Science and Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, ChinaColloidal quantum dots (QDs) provide an ideal platform for the development of integrated optoelectronic devices due to their excellent solution processability and size-tunable optical properties. In this paper, we investigate the self-assembly process of QD micro-rings based on the solution patterning method and the lasing phenomenon in the micro-rings. The characterization of the QD micro-rings demonstrates that they possess a high-quality morphological structure and excellent optical properties. The photoluminescence spectra of the QD micro-rings with different pump fluences are studied, and photon lasing with a narrow linewidth (0.3 nm) is found to have been achieved in the micro-rings above the threshold (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>23</mn><mo> </mo><mi mathvariant="sans-serif">μ</mi><mrow><mi mathvariant="normal">J</mi><mo> </mo><mi mathvariant="normal">c</mi></mrow><msup><mrow><mi mathvariant="normal">m</mi></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula>). The high coherence of the lasing in the QD micro-rings is revealed by angle-resolved photoluminescence (ARPL) spectra at room temperature. Moreover, the interference pattern of the coherent lasing obtained with Young’s double-slit interference method based on the far-field Fourier optical system in the ARPL spectrum reflects the distribution of the optical field in the QD micro-rings. Our research on the self-assembly of colloidal QDs and the lasing of QD micro-rings is expected to further promote the development of on-chip integrated QD optoelectronic devices.https://www.mdpi.com/2304-6732/12/5/477CdSe/ZnS quantum dotssolution patterning methodwhispering gallery microcavityphotonic lasing |
| spellingShingle | Xiaoyu Wang Zelei Chen Haibin Zhao Jun Wang Room-Temperature Lasing in Self-Assembled Micro-Rings of CdSe/ZnS Quantum Dots Photonics CdSe/ZnS quantum dots solution patterning method whispering gallery microcavity photonic lasing |
| title | Room-Temperature Lasing in Self-Assembled Micro-Rings of CdSe/ZnS Quantum Dots |
| title_full | Room-Temperature Lasing in Self-Assembled Micro-Rings of CdSe/ZnS Quantum Dots |
| title_fullStr | Room-Temperature Lasing in Self-Assembled Micro-Rings of CdSe/ZnS Quantum Dots |
| title_full_unstemmed | Room-Temperature Lasing in Self-Assembled Micro-Rings of CdSe/ZnS Quantum Dots |
| title_short | Room-Temperature Lasing in Self-Assembled Micro-Rings of CdSe/ZnS Quantum Dots |
| title_sort | room temperature lasing in self assembled micro rings of cdse zns quantum dots |
| topic | CdSe/ZnS quantum dots solution patterning method whispering gallery microcavity photonic lasing |
| url | https://www.mdpi.com/2304-6732/12/5/477 |
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