Pumping scheme dependent multimode laser emission from free-standing cylindrical microcavity

Peter, Jaison; Saleem, Rasool; Sebastian, Ananthu; Radhakkrishnan, P.; Nampoori, V. P. N.; Girijavallabhan, C. P.; Kailasnath, M.

doi:10.1016/j.optcom.2014.01.054

Cited by 9 publications

(6 citation statements)

References 15 publications

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“…Ideally, if all cavity modes have the same loss, the laser mode is the cavity mode which is positioned closest to the gain maximum. Similar blue-shift with the pump power has been also observed in various dye lasers systems [14][15]. The spectral peak intensity of the polymer ring laser is positioned at the maximum of optical gain which in turn corresponds to the photo-luminescent spectrum peak [15] around 590 nm.…”

Section: Resultssupporting

confidence: 74%

Solvent effects on lasing characteristics for Rh B laser dye

Peter

Kumar

Ananad

et al. 2016

Journal of Luminescence

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Section: Resultssupporting

confidence: 74%

Solvent effects on lasing characteristics for Rh B laser dye

Peter

Kumar

Ananad

et al. 2016

Journal of Luminescence

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“…With an increase in pump power, the radiative transition probability gets enhanced at shorter wavelength side of the spectrum creating a shift in the spectrum towards the blue side. 5 Fig. 5 inset shows the blue-shift of the emission spectrum as a function of pump power.…”

Section: Resultsmentioning

confidence: 99%

“…1 Laser devices of various structures have been achieved by a variety of resonator designs, including microcavities, 2 micro-disks, 3 micro-rings, 4 and hollow fibers. 5,6 Polymer materials have been found to be very attractive both from the technical and economical point of view with its high optical quality, better chemical compatibility with organic dyes, and inexpensive processing techniques. 7 The combination of the tunability and high efficiency of laser dyes with the high power density that can be easily achieved in waveguide structures makes devices based on dye-doped polymer waveguides and fibers very promising.…”

Section: Introductionmentioning

confidence: 99%

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Angular dependent light emission from planar waveguides

Peter

Prabhu

Radhakrishnan

et al. 2015

Journal of Applied Physics

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We have investigated the angular dependence of amplified spontaneous emission (ASE) and laser emission from an asymmetric and free-standing polymer thin films doped with rhodamine 6G, which is transversely pumped by a pulsed Nd:YAG laser. A semi-leaky waveguide or quasi-waveguide structure has been developed by spin coating technique. In these waveguides, the light was confined by the film/air-film/glass substrate interfaces. At the film/substrate interface, a portion of light will reflect back into the film (guided mode) and the remaining refracted to the substrate resulting in cutoff modes. A blue-shift in ASE has been observed when the pump power was increased from 8 to 20 mW allowing a limited range of tuning of emission wavelength. To study the directionality of the ASE from the waveguide, we have measured the output intensity and FWHM of emission spectra as a function of viewing angle (θ) from the plane parallel to film. From the detailed examination of the output emission spectra, as +θ increases from 0° there has been an initial decrease in output intensity, but at a particular angle ≈10° an increase in output intensity was observed. This additional peak in output intensity as +θ is a clear indication of coexistence of the cutoff mode. We also present a compact solid-state laser based on leaky mode propagation from the dye-doped polymer free-standing film (∼50 μm thickness) waveguide. The partial reflections from the broad lateral surfaces of the free-standing films provided the optical feedback for the laser emission with high directionality. For a pump power of 22 mW, an intense line with FWHM <0.2 nm was observed at 578 nm.

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“…According to literature, nonlinear responses are reported to be enhanced because of the strong interaction of plasmonic AuNP [16,17]. This variety of nanoparticle assemblies is wholly different and paves a new way for new possible metamaterials having the desired optical and electronic properties, which can be tuned by the size of colloidal particles and LSPR [18].Within these LSPRs, the oscillations of collective electrons fallin the metal conduction band and can be modi ed by an external eld by employing closely spaced metallic nanoparticles (MNPs). LSPR is the exceptional optical properties of MNPs.…”

Section: Introductionmentioning

confidence: 99%

Blueshift Plasmonic effect in photonic crystal cavity with gold nano-structure

Yadav

Zheng

et al. 2021

Preprint

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In this research article, we reportthe plasmonic effect exhibited by a self-assembled photonic crystal cavity in nanostructures using asecond harmonic laser exposure. The photonic nanostructures composed of goldnanoparticles (AuNPs),enhancedthe fluorescence properties which undergo into lattice planesand thereby affect thenonlinearproperties.The newlyfabricated colloidal structures exhibited a strong plasmonicinteraction with different laser powersdensity.The outcome of this research presentsthe self-assembled nano-photonic cavity as a suitable plasmonic nanostructure for optoelectronic applications. These nanostructurescan be fabricated using high power lasers source,e.g. dye laser and solid-state laser.

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Pumping scheme dependent multimode laser emission from free-standing cylindrical microcavity

Cited by 9 publications

References 15 publications

Solvent effects on lasing characteristics for Rh B laser dye

Solvent effects on lasing characteristics for Rh B laser dye

Angular dependent light emission from planar waveguides

Blueshift Plasmonic effect in photonic crystal cavity with gold nano-structure

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