Publications by authors named "Vladimir A Tolmachev"
Article Synopsis
- - The research focuses on creating core/shell diamond nanoparticles that can heat up when exposed to laser light, thanks to a boron-doped diamond core, leading to various applications like local hyperthermia therapy and thermometry.
- - The nanoparticles feature a thin shell with negatively charged silicon-vacancy (SiV) color centers, which emit strong, temperature-sensitive light at around 738 nm, helping to monitor temperature changes.
- - By adjusting the laser's power, researchers can control the temperature of these nanoparticles safely for biological use, enabling effective treatment and imaging of targeted areas in medical applications.
In this study, a technique for the optimization of the optical characteristics of multi-channel filters after fabrication is proposed. The multi-channel filter under consideration is based on a Si photonic crystal (PhC), tunable liquid crystal and opto-fluidic technologies. By filling air grooves in the one-dimensional, Si-Air PhC with a nematic liquid crystal, an efficiently coupled multi-channel filter can be realised in which a wide stop band is used for channel separation over a wide frequency range.
View Article and Find Full Text PDFWe report on what is believed to be the first example of an ultrawide, bandpass filter, based on a high-contrast multicomponent one-dimensional Si photonic crystal (PC). The effect of the disappearance of a limited number of flat stopbands and their replacement with extended passbands is demonstrated over a wide IR range. The passbands obtained exhibit a high transmission of 92% to 96% and a substantial bandwidth of 1800 nm, which is spectrally flat within the passband.
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