Self-organized lasers from reconfigurable colloidal assemblies

Trivedi, Manish; Saxena, Dhruv; Ng, Wai Kit; Sapienza, Riccardo; Volpe, Giorgio

doi:10.1038/s41567-022-01656-2

Cited by 42 publications

(28 citation statements)

References 53 publications

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“…In particular, it limits the dimensionality of the problems that can be studied 71 : as it induces the localisation of active matter near surfaces and interfaces, most experiments must be conducted in quasi-two-dimensional settings. Moreover, active particles with an intrinsic density heterogeneity such as Janus particles 45 , 47 tend to sediment with a preferential orientation determined by a torque produced by the heterogeneous distribution of the particle’s mass, as observed in recent experiments 72 , 73 .…”

Section: Active Matter and Gravitymentioning

confidence: 65%

“…These forces can play a major role in the formation of active matter in space, with potential interesting applications. For example, it might be possible to realise some large, three-dimensional active colloidal molecules 11 , which could be useful to realise functional materials based on active matter 73 . Inertial effects in active matter .…”

Section: Outlook For Space Explorationmentioning

confidence: 99%

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Active matter in space

et al. 2022

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In the last 20 years, active matter has been a highly dynamic field of research, bridging fundamental aspects of non-equilibrium thermodynamics with applications to biology, robotics, and nano-medicine. Active matter systems are composed of units that can harvest and harness energy and information from their environment to generate complex collective behaviours and forms of self-organisation. On Earth, gravity-driven phenomena (such as sedimentation and convection) often dominate or conceal the emergence of these dynamics, especially for soft active matter systems where typical interactions are of the order of the thermal energy. In this review, we explore the ongoing and future efforts to study active matter in space, where low-gravity and microgravity conditions can lift some of these limitations. We envision that these studies will help unify our understanding of active matter systems and, more generally, of far-from-equilibrium physics both on Earth and in space. Furthermore, they will also provide guidance on how to use, process and manufacture active materials for space exploration and colonisation.

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Section: Active Matter and Gravitymentioning

confidence: 65%

Section: Outlook For Space Explorationmentioning

confidence: 99%

Active matter in space

et al. 2022

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“…Besides, the collective effect of MNMs has been employed in assembly, 15,245,246 self-healing nanodevices, 247 microfabrication, 248 and microelectronics. 249,250 Recently, Chen et al reported the propagation of chemical waves among PMMA-Ag micromotors, which is an example of MNMs applied in fundamental research. 251,252 Since these topics are beyond the current review, we would like to list several excellent review articles to point the readers to relevant specific areas.…”

Section: Biological System Modellingmentioning

confidence: 99%

Controlled propulsion of micro/nanomotors: operational mechanisms, motion manipulation and potential biomedical applications

et al. 2022

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“…However, because of the limited lasing volume, their emission power is still not quite sufficient in driving the applications, for instance, on-chip optical communications. Recently, several designs such as random laser ( 20 , 21 ), topological laser ( 22 , 23 ), and moiré lattice laser ( 24 ) had been proposed to achieve lasing behavior at a 10-wavelength scale to best compromise the footprint and power.…”

Section: Introductionmentioning

confidence: 99%

Low-threshold nanolasers based on miniaturized bound states in the continuum

Ren

Liu

et al. 2022

Sci. Adv.

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The pursuit of compact lasers with low thresholds has imposed strict requirements on tight light confinements with minimized radiation losses. Bound states in the continuum (BICs) have been recently demonstrated as an effective mechanism to trap light. However, most reported BIC lasers are still bulky due to the absence of in-plane light confinement. Here, we combine BICs and photonic bandgaps to realize three-dimensional light confinements, as referred to miniaturized BICs (mini-BICs). We demonstrate highly compact active mini-BIC resonators with a record high-quality ( Q ) factor of up to 32,500, which enables single-mode lasing with the lowest threshold of 80 W/cm 2 among the reported BIC lasers. In addition, photon statistics measurements further confirm the occurrence of the stimulated emission in our devices. Our work reveals a path toward compact BIC lasers with ultralow power consumption and potentially boosts the applications in cavity quantum electrodynamics, nonlinear optics, and integrated photonics.

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Self-organized lasers from reconfigurable colloidal assemblies

Cited by 42 publications

References 53 publications

Active matter in space

Active matter in space

Controlled propulsion of micro/nanomotors: operational mechanisms, motion manipulation and potential biomedical applications

Low-threshold nanolasers based on miniaturized bound states in the continuum

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