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Hewak, Daniel W.
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Topics
Publications (80/80 displayed)
- 2023Large-area synthesis of high electrical performance MoS2 by a commercially scalable atomic layer deposition processcitations
- 2023Conformal CVD-grown MoS2 on three-dimensional woodpile photonic crystals for photonic bandgap engineeringcitations
- 2023Large-area synthesis of high electrical performance MoS 2 by a commercially scalable atomic layer deposition processcitations
- 2023Large-area synthesis of high electrical performance MoS 2 by a commercially scalable atomic layer deposition processcitations
- 2022Whispering gallery mode resonances in thermally poled borosilicate glass hetero-fiberscitations
- 2022Low energy switching of phase change materials using a 2D thermal boundary layercitations
- 2022Low energy switching of phase change materials using a 2D thermal boundary layercitations
- 2021Manufacturing of GLS-Se glass rods and structured preforms by extrusion for optical fiber drawing for the IR regioncitations
- 2021Whispering gallery mode resonances in thermally poled borosilicate glass optical microcavities
- 2020Enhancement of nonlinear functionality of step-index silica fibers combining thermal poling and 2D materials depositioncitations
- 2020GLS-Se optical fibre from extruded glass structured preforms and rods for the IR regioncitations
- 2019Chalcogenide materials and applications: from bulk to 2D (Invited Talk)
- 2019Mechanochromic reconfigurable metasurfacescitations
- 2019Erbium-doped chalcogenide glass thin film on silicon using femtosecond pulsed laser with different deposition temperaturescitations
- 2019Giant photoinduced chirality in thin film Ge2Sb2Te5citations
- 2019Fabrication of structured GLS-Se glass preforms by extrusion for fibre drawing
- 2019Radiation trapping in selected Er3+ doped chalcogenide glasses and the extraction of the nonradiative lifetimecitations
- 2019Tuning MoS2 metamaterial with elastic strain
- 2019High-throughput physical vapour deposition flexible thermoelectric generatorscitations
- 2019Design and implementation of fiber-embedded plasmonic structures in microwires
- 2018Chalcogenide optical fibres based on gallium lanthanum sulphide-Se for passive and active applications
- 2018Further studies of radiation trapping in Er3+ doped chalcogenide glassescitations
- 2018All-fiber plasmonic platform based on hybrid composite metal/glass microwirescitations
- 2018Optical-resonance-enhanced nonlinearities in a MoS2-coated single-mode fibercitations
- 2017Wafer scale spatially selective transfer of 2D materials and heterostructures
- 2017Structural modification of Ga-La-S glass for a new family of chalcogenidescitations
- 2017Dielectric and structural characterisation of chalcogenide glasses via terahertz time-domain spectroscopycitations
- 2017Wafer scale pre-patterned ALD MoS2 FETs
- 2017Chemical vapor deposition and Van der Waals epitaxy for wafer-scale emerging 2D transition metal di-chalcogenides
- 2017Tuneable sputtered films by doping for wearable and flexible thermoelectrics
- 2017Optical, thermal, and mechanical characterization of Ga2Se3-Added GLS glasscitations
- 2017Enhancing the applications of chalcogenide glass for passive and active multispectral applications
- 2017Measurement of dn/dT and dk/dT of optical crystals, ceramics, and chalcogenide glasses between 80K and 1050K
- 2017Further studies of radiation trapping in Er3+ doped chalcogenide glasses
- 2016Next generation chalcogenide glasses for visible and IR imaging
- 2016Robust plasmonic tips fabricated by the tapering of composite hybrid silicate microfibers with metallic core
- 2016Lithography assisted fiber-drawing nanomanufacturingcitations
- 2016Advanced CVD technology for emerging transition metal di-chalcogenides
- 2016Ga-La-S glass for UV and IR applications
- 2015Fabrication of tin sulphide and emerging transition metal di-chalcogenides by CVD
- 2015Amorphous metal-sulphide microfibers enable photonic synapses for brain-like computingcitations
- 2015Planar-fiber nanomanufacturing
- 2015CVD-grown tin sulphide for thin film solar cell devices
- 2015Properties of gallium lanthanum sulphide glass
- 2014Femtosecond multi-level phase switching in chalcogenide thin films for all-optical data and image processing
- 2014Multimaterial fiber nanomanufacturing: from photodetectors to nonlinear light sources
- 2014Manufacturing high purity chalcogenide glass
- 2013On the analogy between photoluminescence and carrier-type reversal in Bi- and Pb-doped glasses ; Analogie mezi fotoluminescencí a změnou typu vodivosti v Bi- a Pb-dotovaných sklechcitations
- 2013Chalcogenide-based phase-change metamaterials for all-optical, high-contrast switching in a fraction of a wavelength
- 2013Crystallization study of the CuSbS2 chalcogenide material for solar applications
- 2013On the analogy between photoluminescence and carrier-type reversal in Bi-and Pb-doped glassescitations
- 2012Temperature dependent lifetime of Dy 3+:1.3 μm emission in Ge-As-S glass containing very small amount of Ga and CsBrcitations
- 2011Novel methods for the preparation of high purity chalcogenide glass for optical fiber applications
- 2010Switching metamaterials with electronic signals and electron-beam excitations
- 2010Chalcogenide glasses in active plasmonicscitations
- 2010Metamaterial electro-optic switch of nanoscale thicknesscitations
- 2010Chalcogenide glasses for photonics device applications
- 2010Chalcogenide glasses for photonics device applications
- 2010Chalcogenide plasmonic metamaterial switches
- 2010Position-dependent coupling between a channel waveguide and a distorted microsphere resonatorcitations
- 2010Chalcogenide glass microsphere lasercitations
- 2010Active chalcogenide glass photonics and electro-optics for the mid-infrared
- 2009Chalcogenide glass microspheres and their applications
- 2009Chalcogenide glass metamaterial optical switch
- 2009Focused ion beam etched ring-resonator in CVD-grown Ge-Sb-S thin films
- 2008Influence of deposition parameters on composition and refractive index of femtosecond and nanosecond pulsed laser deposited gallium lanthanum oxysulphidecitations
- 2007Antimony germanium sulphide amorphous thin films fabricated by chemical vapour depositioncitations
- 2007Chalcogenide glass microspheres: their production characterization and potentialcitations
- 2007Femtosecond pulsed laser deposition of amorphous gallium lanthanum oxysulphide films
- 2007Electrical phase change of Ga:La:S:Cu filmscitations
- 2005Inverted deposition and high-velocity spinning to develop buried planar chalcogenide glass waveguides for highly nonlinear integrated opticscitations
- 2005Chalcogenide glass thin films and planar waveguidescitations
- 2005Chalcogenide glass thin films and planar waveguidescitations
- 2004Transition metal-doped chalcogenide glasses for broadband near-infrared sourcescitations
- 2004Chalcogenide glass thin films through inverted deposition and high velocity spinningcitations
- 2004Deposition and characterization of germanium sulphide glass planar waveguidescitations
- 2004Channel waveguide lasers in a lead silicate glass fashioned using the extrusion techniquecitations
- 2003Properties and application of germanium sulphide glass
- 2003Through thick and thin: recent developments with chalcogenide films
- 2002Laser performance and spectroscopic analysis of optically written channel waveguides in neodymium-doped gallium lanthanum sulphide glasscitations
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article
Whispering gallery mode resonances in thermally poled borosilicate glass hetero-fibers
Abstract
Whispering gallery mode (WGM) resonances in radially, thermally poled glass hetero-fibers, are investigated for the first time. Upon radially oriented thermal poling, both TE and TM polarized responses undergoing a spectral 'cleaning' process, namely higher-order radial modes are being suppressed, or even fully annihilated, compared to the spectral behavior of the pristine fibers. Second-harmonic generation (SHG) microscopy, Energy Dispersive X-Ray Spectroscopy (EDX) and micro-Raman (μ-Raman) measurements were conducted in order to reveal the spatial profile of the structural and optical changes introduced to the thermally poled hetero-fibers, and correlate them with the WGM spectral measurements. The specific selective, mode cleaning behavior is attributed to refractive index changes generated in proximity to the fiber's circumference, which are associated with radially-symmetric ionic re-distribution. The thermally poled hetero-fiber WGM cavities have been rigorously simulated using the finite element method, the calculated modal eigenstates and transmission spectra, further confirm the specific mode selection mechanism, introduced by the azimuthally symmetric thermal, poling process.