Prevention, Treatment and Tiagnosis of Pathogenic Infections by Using Pulsed Light Radiation Propagating Through Metamaterials

Euroinvent ICIR 2018

Enaki, N.^1 ; Paslari, T.^1 ; Turcan, M.^1 ; Bazgan, S.^1 ; Ristoscu, C.^2 ; Mihailescu, I.N.^2

Institute of Applied Physics, Republic of Moldova, Chisinau, Moldova^1

National Institute for Lasers, Plasma and Radiation Physics (INFLPR), Romania^2

关键词: Collective process;    Contaminated materials;    Different frequency;    Exponential distributions;    Intrinsic symmetries;    Pathogenic infections;    Photonic molecules;    Resonant excitation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/374/1/012011/pdf
DOI  :  10.1088/1757-899X/374/1/012011

来源: IOP

【 摘 要 】

We propose novel optical methods for prevention, treatment and diagnosis of infections by pathogens using metamaterials with various geometries consisting of microspheres (i.e. photonic crystals, photonic molecules) and optical fibers structures. Around the adjacent elements of metamaterials appear the evanescent zones of propagated pulsed light radiation overlapping each other. This effect gives us the possibility to significantly increase the decontamination volume especially in non-transparent media. The parking geometries of microspheres and optical fibers ensure the efficient contact zone between the pulsed light radiation with contaminated materials (gases, liquids, tissues, implant surfaces). The penetration depth of evanescent field in contaminated materials can achieve values comparable with pathogens dimensions. We propose an attractive antimicrobial strategy using combined action of ultrashort pulses with different frequencies and pulse duration to achieve the selective decontamination of microorganisms with minimal effects on the components of human cells and tissues. We take into consideration the intrinsic symmetries of microorganisms protein structures (inclusive virus capsids) and their possible resonant excitation in double frequencies induced Raman scattering. The development of nonlinear models of the excitation of vibration modes of biomolecules of viruses and bacteria are revised taking into consideration the multi-mode aspects of interaction of pulsed light with excited biomolecules of pathogens. This method opens new possibilities in decontamination and diagnosis of the new collective processes, which can take place in viruses, bacteria, or other cellular structures under the action of external light pulses. Exponential distribution of radiation in evanescent zone gives us the possibility to capture and trap the viruses and bacteria along the optical fibers or/and microsphere surfaces.