Multimode laser emission from free-standing cylindrical microcavities

Peter, Jaison; Radhakrishnan, P.; Nampoori, V. P. N.; Kailasnath, M.

doi:10.1016/j.jlumin.2014.01.003

Cited by 19 publications

(8 citation statements)

References 21 publications

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“…In our lasing experiment, external feedback at the cuvette sides might have encouraged the lasing action. It was expected that both the stimulated emission along with the gain guiding and the external feedback at the cuvette sides would induce a high gain for the laser action [16]. The occurrence of mode structure from dye solution was also reported by Guang et al, where the laser emission was attributed to the Fresnel reflection feedback from the two parallel optical windows of the cuvette [17].…”

Section: Resultsmentioning

confidence: 69%

Solvent effects on lasing characteristics for Rh B laser dye

Peter

Kumar

Ananad

et al. 2016

Journal of Luminescence

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Section: Resultsmentioning

confidence: 69%

Solvent effects on lasing characteristics for Rh B laser dye

Peter

Kumar

Ananad

et al. 2016

Journal of Luminescence

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“…It should be also noted that compared with lateral pumping scheme, the laser peak wavelengths exhibits some red shift for longitudinal pumping scheme, which could be attributed to self‐absorption effect caused by the overlap between the absorption and emission spectra of rhodamine B. Since WGM laser is propagating surrounding the cross sectional periphery of the capillary, for longitudinal pumping scheme fluorescence light would be absorbed by rhodamine B molecules adjacent to the microcavity layer and converted into longer wavelength light through re‐emission process .…”

Section: Resultsmentioning

confidence: 99%

Silica‐tube‐based whispering gallery mode DYE lasers based on different pumping schemes

Yan

Liu

Zhang

et al. 2017

Micro & Optical Tech Letters

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We have investigated the properties of silica‐tube‐based whispering gallery mode dye lasers based on two different pumping schemes. A comparison of some fundamental laser properties such as lasing threshold and slope efficiency under different pumping schemes is presented in this article. Moreover, we have also studied lasing emission spectral shift induced by self‐absorption of dye materials as well as change of quality factor under different dye concentrations. The compactness, low lasing threshold and spectral tunability of the proposed opto‐fluidic ring resonator dye laser make it a good candidate for on‐chip light source and related biochemical sensing applications. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:609–614, 2017

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“…The self-propelling droplet was still able to generate strong WGM lasing due to total internal reflection on its spherical surface, as shown in Figure c. However, the slow dissolution of nematic LC molecules triggered a small blue-shift tendency in the spectrum due to the Stokes shift and two-photon absorption. , Interestingly, the swimming motions and trajectories of the microlaser change with the droplet diameter, including random, zigzag, and straight motions (Figure d). This phenomenon is consistent with a phenomenological theory about self-propelled objects: linear motion becomes unstable under a large diameter or high velocity, and then helical motion spontaneously appears. − Under a fixed droplet size, the velocity can also be manipulated by changing the surfactant concentrations (Figure e).…”

mentioning

confidence: 94%

Autonomous Microlasers for Profiling Extracellular Vesicles from Cancer Spheroids

et al. 2023

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Self-propelled micro/nanomotors are emergent intelligent sensors for analyzing extracellular biomarkers in circulating biological fluids. Conventional luminescent motors are often masked by a highly dynamic and scattered environment, creating challenges to characterize biomarkers or subtle binding dynamics. Here we introduce a strategy to amplify subtle signals by coupling strong light–matter interactions on micromotors. A smart whispering-gallery-mode microlaser that can self-propel and analyze extracellular biomarkers is demonstrated through a liquid crystal microdroplet. Lasing spectral responses induced by cavity energy transfer were employed to reflect the abundance of protein biomarkers, generating exclusive molecular labels for cellular profiling of exosomes derived from 3D multicellular cancer spheroids. Finally, a microfluidic biosystem with different tumor-derived exosomes was employed to elaborate its sensing capability in complex environments. The proposed autonomous microlaser exhibits a promising method for both fundamental biological science and applications in drug screening, phenotyping, and organ-on-chip applications.

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Multimode laser emission from free-standing cylindrical microcavities

Cited by 19 publications

References 21 publications

Solvent effects on lasing characteristics for Rh B laser dye

Solvent effects on lasing characteristics for Rh B laser dye

Silica‐tube‐based whispering gallery mode DYE lasers based on different pumping schemes

Autonomous Microlasers for Profiling Extracellular Vesicles from Cancer Spheroids

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