Effects of surface charge on the anomalous light extinction from metallic nanoparticles

Sijercic, E.; Leung, P. T.

doi:10.1016/j.optcom.2016.02.065

Cited by 9 publications

(2 citation statements)

References 15 publications

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“…If electrically charged, many of these particles can have a significant impact on the transmission range of MW communication links as observed in dust storms. A number of theoretical analyses specifically oriented toward understanding the optical resonances in charged particles have been performed in the last few years (Heinisch et al., 2013; Klačka & Kocifaj, 2007; Rosenkrantz & Arnon, 2010; Sijercic & Leung, 2016); however, systematic research on natural aerosol populations has not been conducted until now. It is a challenge to analyze the range of MW attenuations that we can expect from aerosols in different regions.…”

Section: Introductionmentioning

confidence: 99%

The Nature, Amplitude and Control of Microwave Attenuation in the Atmosphere

et al. 2021

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Microwave (MW) attenuation plays a critical role in constructing communication networks. It also can be a useful tool in the meteorological and optical communities for radar and microwave imaging applications. Because most atmospheric constituents (large hydrometeors being an exception) are very small compared to MW wavelengths, data analysis is typically performed using conventional Rayleigh theory; however, some anomalous observations have proven difficult to explain. We present the results of the first systematic numerical computations over a wide range of aerosol properties. We demonstrate that it is possible to perform mass computations of aerosol loading, which is an important climate parameter. We show that discrepancies found between theoretical predictions and observations can be attributed to the effect of the expected charge acquired by the dust particles through contact electrification occurring in dust storms. While frequencies below 10 GHz normally allow for long‐distance signal transmission, the charge‐induced resonances in particles can preferentially amplify the low‐frequency MW attenuation by a factor of 10 or more, depending on their surface electric potential. In addition, we find electrically charged particles dispersed in a local atmosphere as a potential tool for the controlled manipulation of MW attenuation.

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Section: Introductionmentioning

confidence: 99%

The Nature, Amplitude and Control of Microwave Attenuation in the Atmosphere

et al. 2021

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“…The main pollution sources, including industrial dusts and chemical colloids suspended in air, are also charged. Nanoparticle charge is a crucial parameter in optics: it not only attracts theoretical studies on the differed electromagnetic field scattering pattern compared to neutral nanoparticles [39][40][41][42][43][44][45][46], but it also is applied to enhance light absorption [47,48], Raman scattering [49], molecular fluorescence [50], and even to help manipulate nanoparticles [51]. To measure the charge, traditional electrical methods [34,[52][53][54] are limited to micron-sized particles.…”

Section: Introductionmentioning

confidence: 99%

Measuring the Charge of a Single Dielectric Nanoparticle Using a High-QOptical Microresonator

et al. 2016

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Measuring the charge of a nanoparticle is of great importance in many fields including optics, astronomy, biochemistry, atmospheric science, environmental engineering, and dusty plasma. Here, we propose to use a high-Q whispering-gallery-mode (WGM) optical microresonator to detect the surface and bulk charge of a dielectric nanoparticle. Because of the modification of nanoparticle conductivity induced by the surplus electrons, both the coupling strength between the nanoparticle and the WGM and the dissipation changes compared with the case of a neutral nanoparticle. The charge density can be inferred from the transmission spectrum of the WGM microresonator. By monitoring the mode splitting, the linewidth broadening or the resonance dip value of the transmission spectrum, surface (bulk) electron density as low as 0.007 nm −2 (0.001 nm −3) can be detected for nanoparticles with negative (positive) electron affinity. The high sensitivity is attributed to the ultranarrow resonance linewidth and small mode volume of the microresonator.

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