Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity

Juodkazis, Saulius; Fujiwara, Kunihiko; Takahashi, Takafumi; Matsuo, Shigeki; Misawa, Hiroaki

doi:10.1063/1.1426240

Cited by 25 publications

(20 citation statements)

References 22 publications

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“…This matching provides a strong confirmation that J-aggregates are in both spectral and spatial resonance with the optical modes of a microcavity. Similar behavior have been reported for a number of other emitters attached to spherical microcavities like dye molecules [18,19], semiconductor quantum dots [20][21][22] or nano-diamonds containing nitrogen-vacancy centres [23]. In all these studies the distribution of TE mode visibility follows this trend too with TE modes dominating over TM modes of the same order.…”

Section: Resonant Polarization Sensitive Wgms Dampingsupporting

confidence: 61%

Whispering gallery mode resonators with J-aggregates

Melnikau¹,

Savateeva²,

Hillenbrand³

et al. 2011

Opt. Express

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Abstract:We have studied the optical properties of a hybrid system consisting of cyanine dye J-aggregates attached to a spherical microcavity. A periodic structure of narrow peaks was observed in the photoluminescence spectrum of the J-aggregates, arising from the coupling between the emission of J-aggregates and the whispering gallery modes (WGMs) of the microcavity. The most striking result of our study is the observation of polarization sensitive mode damping caused by re-absorption of J-aggregate emission. This effect manifests itself in dominating emission from TM modes in the spectral region of J-aggregates absorption band where the TE modes are strongly suppressed. In contrast, the TE modes totally dominate emission spectrum in the region where absorption is negligible. We also demonstrate that the emission intensity can be further enhanced by depositing a hybrid layer of J-aggregates and Ag nanoparticles onto the spherical microcavity. Owing to the concerted action of WGMs and plasmonic hot spots in the Ag aggregates, we observe an enhanced Raman signal from the J-aggregates. Microcavities covered by Jaggregates and plasmonic nanoparticles could be thus useful for a variety of photonic applications in basic science and technology.

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Section: Resonant Polarization Sensitive Wgms Dampingsupporting

confidence: 61%

Whispering gallery mode resonators with J-aggregates

Melnikau¹,

Savateeva²,

Hillenbrand³

et al. 2011

Opt. Express

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“…This principle was used to excite lasing whispering gallery modes (or morphology dependent resonances (MDR)) in dyedoped spherical and elliptical micro-particles. 149 The microcavity of a particle can provide necessary feedback for lasing in the case of active media (usually a dye) being inside the cavity or even outside. In the later case the dye emission enters the cavity as an evanescent field and is amplified via the MDR mechanism.…”

Section: Photo-structuring By Laser Tweezersmentioning

confidence: 99%

“…Typical setup to perform all-optical switching experiments by laser trapped droplets of liquid crystals (LCs) is shown in Figure 29. 141,143,148,149 A combined angular tuning of =2 and =4 plates allows precise control of the polarization of the laser beam at the focus (the polarization is analyzed by a Nikol prism at point A before the objective lens). The laser trapping force is calibrated by measuring the speed at which the laser trapped micro-sphere of radius, r, is released in liquid of known viscosity, , using Stokes' law.…”

Section: Laser Tweezers Acting On Birefringent Particlesmentioning

confidence: 99%

Three-Dimensional Micro- and Nano-Structuring of Materials by Tightly Focused Laser Radiation

Juodkazis¹,

Mizeikis²,

Matsuo³

et al. 2008

Bulletin of the Chemical Society of Japan

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Three-dimensional laser microfabrication blends microscopy, optical nonlinear phenomena, photomodification, laser trapping, and creates novel possibilities for fabrication of micro-and nano-structures in a wide range of materials. This work reviews various implementations of laser photo-structuring and micromanipulation applied to photo-modification of various materials: glasses, crystals, polymers, gels, and liquid crystals.

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“…1(a)). According to the Lorenz-Mie scattering theory [13], the separation between the adjacent resonance wavelengths of the WGM is approximately given by Dl ¼ l 2 2pn 2 a tan À1 ½ððn 1 =n 2 Þ 2 À 1Þ 1=2…”

Section: Resultsmentioning

confidence: 99%