Quantum Dot Colloidosomes as Triggerable Microlasers

Abstract

Quantum dot (QD) supraparticle lasers are promising platforms for microscale light sources and photonic labeling, yet their optical properties are set during assembly. Here we introduce QD colloidosomes, liquid-core/solid-shell supraparticles that combine whispering-gallery-mode optical feedback with stimulus-triggered structural collapse. Intact QD colloidosomes show cavity-defined lasing with fluence thresholds of ~2.8 mJ/cm2 and linewidths of 2.2-3.7 nm, demonstrating efficient light trapping without a solid core. We identify shell continuity as a critical determinant for whispering-gallery feedback and lasing by exploring a morphological continuum of suprastructures comprising solid supraparticles, colloidosomes, and microporous hollow shells. Intact colloidosomes support narrow cavity modes, whereas porous shells remain broadband even at high pump fluence. We show that colloidosomes can be driven to rupture and release payload through well-defined pathways, including meniscus-driven capillary failure, uniform heating, and localized near-infrared activation, thereby reconfiguring their optical response from cavity-defined lasing to broadband emission. These results establish QD colloidosomes as reconfigurable microlasers that couple optical-state switching and triggered release within a single self-assembled platform.

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Cite

BibTeX RIS

BibTeX

@misc{gonzalez2026quantum,
  title = {{Quantum Dot Colloidosomes as Triggerable Microlasers}},
  author = {Cristian Gonzalez and Saranya Subramanian and Marco Reale and Giuseppe Soligno and Ilia Geints and Siyuan Yin and Claire Y. Kang and Ricky Ronquillo and Gary Chen and Marco Cannas and Cherie R. Kagan and Alice Sciortino and Michael Engel and Fabrizio Messina and Christopher B. Murray and Emanuele Marino},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.30919},
  eprint = {2608.30919},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.30919},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Quantum Dot Colloidosomes as Triggerable Microlasers
AU  - Cristian Gonzalez
AU  - Saranya Subramanian
AU  - Marco Reale
AU  - Giuseppe Soligno
AU  - Ilia Geints
AU  - Siyuan Yin
AU  - Claire Y. Kang
AU  - Ricky Ronquillo
AU  - Gary Chen
AU  - Marco Cannas
AU  - Cherie R. Kagan
AU  - Alice Sciortino
AU  - Michael Engel
AU  - Fabrizio Messina
AU  - Christopher B. Murray
AU  - Emanuele Marino
PY  - 2026
DA  - 2026/08/31
PB  - arXiv
DO  - 10.48550/arxiv.2608.30919
UR  - https://arxiv.org/abs/2608.30919
AB  - Quantum dot (QD) supraparticle lasers are promising platforms for microscale light sources and photonic labeling, yet their optical properties are set during assembly. Here we introduce QD colloidosomes, liquid-core/solid-shell supraparticles that combine whispering-gallery-mode optical feedback with stimulus-triggered structural collapse. Intact QD colloidosomes show cavity-defined lasing with fluence thresholds of ~2.8 mJ/cm2 and linewidths of 2.2-3.7 nm, demonstrating efficient light trapping without a solid core. We identify shell continuity as a critical determinant for whispering-gallery feedback and lasing by exploring a morphological continuum of suprastructures comprising solid supraparticles, colloidosomes, and microporous hollow shells. Intact colloidosomes support narrow cavity modes, whereas porous shells remain broadband even at high pump fluence. We show that colloidosomes can be driven to rupture and release payload through well-defined pathways, including meniscus-driven capillary failure, uniform heating, and localized near-infrared activation, thereby reconfiguring their optical response from cavity-defined lasing to broadband emission. These results establish QD colloidosomes as reconfigurable microlasers that couple optical-state switching and triggered release within a single self-assembled platform.
ER  -

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