Morphology-dependent resonances in a cylindrical dye microlaser: mode assignments, cavity Q values, and critical dye concentrations

Knight, Jonathan C.; Driver, H. S. T.; Robertson, G. N.

doi:10.1364/josab.11.002046

Cited by 25 publications

(7 citation statements)

References 22 publications

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“…15 In fact, these optical modes never reach the film/core interface, and therefore, are dubbed whispering gallery modes ͑WGM͒. 10,11 The light in this case is confined by total internal reflections at the film/air interface, and the mode intensity distribution is concentrated on the outer edge of the film. The WGM wavelengths are still given by Eq.…”

Section: ͓S0003-6951͑98͒00115-6͔mentioning

confidence: 99%

Plastic microring lasers on fibers and wires

Фролов

Vardeny

Yoshino

1998

Applied Physics Letters

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Photopumped, pulsed, narrow line laser emission is demonstrated using cylindrical microcavities formed by π-conjugated polymer thin films wrapped around thin glass optical fibers and metal wires with various diameters D. A variety of cavity-dependent resonant laser mode structures were observed, which for D<10 μm contain a single resonant spectral line of less than 1 Å in width. The microring lasers are also characterized by a well-defined, very low threshold excitation intensity, at which beam directionality and polarization degree dramatically increase. These findings open up the fields of lasers and fiber optics to organic materials.

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Section: ͓S0003-6951͑98͒00115-6͔mentioning

confidence: 99%

Plastic microring lasers on fibers and wires

Фролов

Vardeny

Yoshino

1998

Applied Physics Letters

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“…Mechanisms besides absorption which degrade the total Q i.e, increase the net loss, may also cause the lasing spectra to shift toward the blue. 86,87 The spectra in Fig. 26 suggest that it may be possible to estimate droplet temperatures from measurements of lasing spectra.…”

Section: Temperature Determination From Absorption-induced Q-degradationmentioning

confidence: 99%

“…83 A temperaturedependent configurational change (octahedral to tetrahedral with increasing temperature) in the Co 24 " complexes in the presence of Cl~ ion gives rise to thermochromism. 84,86 Droplets (radii ~ 35 /jm) are made from the mixture of 85% iso-propanol and 15% water with 0.1 M C0CI26H2O. The metallic orifice assembly is wrapped with a heating tape.…”

Section: Temperature Determination From Absorption-induced Q-degradationmentioning

confidence: 99%

Optical Resonances of a Spherical Dielectric Microcavity: Effects of Perturbations

Mazumder¹,

Chowdhury²,

Hill³

et al. 1996

Optical Processes in Microcavities

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The resonances of a dielectric microsphere (morphology-dependent resonances (MDR's), whispering gallery modes, or quasinormal modes) have extremely large (>10 6 ) quality factors (Q's) even when the sphere is as small as a few wavelengths. Perturbations in the refractive index or the shape of a microsphere shift the resonance frequencies and change the Q's from those of the unperturbed sphere. Here we develop an effective-average model to compute the first-order perturbation-induced changes in the resonance frequencies and the Q's of the MDR's. Near or on a resonance, a modified definition of mode volume is used to approximate the microsphere as a closed cavity. Analogous to the modal gain or loss in a waveguide cavity, an effective-average modal gain or loss in an inhomogeneous microsphere is defined. Both the effective-average and a time-independent perturbation theory are used to model optical bistability in a dielectric microsphere. Dispersive and absorptive optical bistability result from intensity-dependent perturbations in the real and the imaginary part of the refractive index, respectively. The effect of perturbations (e.g., size changes, shape deformations, and temperature-dependent absorption) on the dye-lasing spectra from liquid microdroplets are discussed. We show that perturbation effects can be used to develop optical diagnostics for the determination of droplet properties such as evaporation rate, shape deformation, surface tension, and temperature.

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“…Interference modulation was observed from a layered microtube by Knight et al. . These microcavities provide superior two‐dimensional optical confinement with Q values in excess of 10 6 and bode well for low laser thresholds.…”

Section: Introduction To Tubular Microcavitiesmentioning

confidence: 95%

“…These microcavities provide superior two‐dimensional optical confinement with Q values in excess of 10 6 and bode well for low laser thresholds. The fused‐silica capillary tube is filled with a dye‐doped liquid having a high refractive index and this type of microcavity laser is called a core‐resonance capillary‐fiber WGMs laser . The hollow microstructure (microsphere) was suggested by Artemyev et al.…”

Section: Introduction To Tubular Microcavitiesmentioning

confidence: 99%

Optical microcavities with tubular geometry: properties and applications

Wang

Zhan

Huang

et al. 2013

Laser & Photonics Reviews

102

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Optical microcavities with whispering-gallery modes (WGMs) have large potential and, in particular, those with a tubular geometry have attracted increasing attention due to their special geometry and interesting properties such as trimmed resonant modes, simplicity as fluidic channels, threedimensionally (3D) mode confinement, unique evanescent wave, and so on. Optical microcavities with the tubular geometry meet the challenge of assembly of conductive, semiconductive and insulating materials into a tubular geometry, thus spurring multifunctional applications to optofluidic devices, optical microdevices like microlasers, and bio/chemical sensors. Fabrication methods such as the fiber-drawing method, rolled-up nanotechnology, electrospin technique, and template-assistant method have been developed to address the various requirements. These tubular optical microcavities enable researchers to explore and construct novel optical microdevices for a wide range of potential applications. This review describes the tubular optical microcavities from the perspectives of theoretical consideration, optical characterization, and potential applications.

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Morphology-dependent resonances in a cylindrical dye microlaser: mode assignments, cavity Q values, and critical dye concentrations

Cited by 25 publications

References 22 publications

Plastic microring lasers on fibers and wires

Plastic microring lasers on fibers and wires

Optical Resonances of a Spherical Dielectric Microcavity: Effects of Perturbations

Optical microcavities with tubular geometry: properties and applications

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