In-Situ Quantum Optical Measurement for Colloidal Quantum Dots Confined in an Optical Trap
Abstract
While optical manipulation of atomic arrays has reached a high degree of precision and scalability, the stable optical confinement of solution-based artificial atoms like colloidal quantum dots (CQDs) remains hindered by weak trapping forces and thermal fluctuations. High-intensity trapping often compromises the quantum properties of these emitters, creating a significant trade-off between mechanical stability and optical integrity. To overcome this, we propose encapsulating CQDs within a transparent polymer matrix, thereby increasing the effective interaction volume and optical restoring force without altering the emitters themselves. This strategy allows for stable spatial confinement under standard experimental conditions, as evidenced by the direct resolution of positional fluctuations through photoluminescence imaging and trajectory tracking. With averaged position fluctuations below 20 nm, the intrinsic emission spectra and photoluminescence decay dynamics remain largely unaffected, and photon-correlation measurements confirm the full preservation of single-photon emission. These findings establish a robust method for the controlled confinement of colloidal quantum emitters and in-situ quantum-optical measurements for future advancements in quantum-optical manipulation of artificial atoms.
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BibTeX
@misc{ni2026insitu,
title = {{In-Situ Quantum Optical Measurement for Colloidal Quantum Dots Confined in an Optical Trap}},
author = {Zhi-Bo Ni and Jiong-Zhao Li and Jia-Wang Yu and Xiao-Tian Cheng and Yun-Ran Wang and Dai-Bao Hou and Yan-Hua Liu and Wei Fang and Xing Lin and Chao-Yuan Jin},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.16692},
eprint = {2609.16692},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.16692},
}
RIS
TY - UNPB
TI - In-Situ Quantum Optical Measurement for Colloidal Quantum Dots Confined in an Optical Trap
AU - Zhi-Bo Ni
AU - Jiong-Zhao Li
AU - Jia-Wang Yu
AU - Xiao-Tian Cheng
AU - Yun-Ran Wang
AU - Dai-Bao Hou
AU - Yan-Hua Liu
AU - Wei Fang
AU - Xing Lin
AU - Chao-Yuan Jin
PY - 2026
DA - 2026/09/15
PB - arXiv
DO - 10.48550/arxiv.2609.16692
UR - https://arxiv.org/abs/2609.16692
AB - While optical manipulation of atomic arrays has reached a high degree of precision and scalability, the stable optical confinement of solution-based artificial atoms like colloidal quantum dots (CQDs) remains hindered by weak trapping forces and thermal fluctuations. High-intensity trapping often compromises the quantum properties of these emitters, creating a significant trade-off between mechanical stability and optical integrity. To overcome this, we propose encapsulating CQDs within a transparent polymer matrix, thereby increasing the effective interaction volume and optical restoring force without altering the emitters themselves. This strategy allows for stable spatial confinement under standard experimental conditions, as evidenced by the direct resolution of positional fluctuations through photoluminescence imaging and trajectory tracking. With averaged position fluctuations below 20 nm, the intrinsic emission spectra and photoluminescence decay dynamics remain largely unaffected, and photon-correlation measurements confirm the full preservation of single-photon emission. These findings establish a robust method for the controlled confinement of colloidal quantum emitters and in-situ quantum-optical measurements for future advancements in quantum-optical manipulation of artificial atoms.
ER -