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Konidakis, Ioannis
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Publications (6/6 displayed)
- 2023Change of Conduction Mechanism in Polymer/Single Wall Carbon Nanotube Composites upon Introduction of Ionic Liquids and Their Investigation by Transient Absorption Spectroscopy: Implication for Thermoelectric Applicationscitations
- 2022Probing the Carrier Dynamics of Polymer Composites with Single and Hybrid Carbon Nanotube Fillers for Improved Thermoelectric Performancecitations
- 2022Whispering gallery mode resonances in thermally poled borosilicate glass hetero-fiberscitations
- 2022Probing the effect of a glass network on the synthesis and luminescence properties of composite perovskite glasses [Invited]citations
- 2020Nitrogen-Doped Carbon Nanotube/Polypropylene Composites with Negative Seebeck Coefficient
- 2019Limitations of a polymer-based hole transporting layer for application in planar inverted perovskite solar cellscitations
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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.