dorsal/arxiv
View SchemaThree-Dimensional FDTD Simulation of Biomaterial Exposure to Electromagnetic Nanopulses
| Authors | Neven Simicevic |
|---|---|
| Categories | |
| ArXiv ID | physics/0506087 |
| URL | https://arxiv.org/abs/physics/0506087 |
| DOI | 10.1088/0031-9155/50/21/007 |
Abstract
Ultra-wideband (UWB) electromagnetic pulses of nanosecond duration, or nanopulses, have been recently approved by the Federal Communications Commission for a number of various applications. They are also being explored for applications in biotechnology and medicine. The simulation of the propagation of a nanopulse through biological matter, previously performed using a two-dimensional finite difference-time domain method (FDTD), has been extended here into a full three-dimensional computation. To account for the UWB frequency range, a geometrical resolution of the exposed sample was $0.25 mm$, and the dielectric properties of biological matter were accurately described in terms of the Debye model. The results obtained from three-dimensional computation support the previously obtained results: the electromagnetic field inside a biological tissue depends on the incident pulse rise time and width, with increased importance of the rise time as the conductivity increases; no thermal effects are possible for the low pulse repetition rates, supported by recent experiments. New results show that the dielectric sample exposed to nanopulses behaves as a dielectric resonator. For a sample in a cuvette, we obtained the dominant resonant frequency and the $Q$-factor of the resonator.
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"abstract": "Ultra-wideband (UWB) electromagnetic pulses of nanosecond duration, or\nnanopulses, have been recently approved by the Federal Communications\nCommission for a number of various applications. They are also being explored\nfor applications in biotechnology and medicine. The simulation of the\npropagation of a nanopulse through biological matter, previously performed\nusing a two-dimensional finite difference-time domain method (FDTD), has been\nextended here into a full three-dimensional computation. To account for the UWB\nfrequency range, a geometrical resolution of the exposed sample was $0.25 mm$,\nand the dielectric properties of biological matter were accurately described in\nterms of the Debye model. The results obtained from three-dimensional\ncomputation support the previously obtained results: the electromagnetic field\ninside a biological tissue depends on the incident pulse rise time and width,\nwith increased importance of the rise time as the conductivity increases; no\nthermal effects are possible for the low pulse repetition rates, supported by\nrecent experiments. New results show that the dielectric sample exposed to\nnanopulses behaves as a dielectric resonator. For a sample in a cuvette, we\nobtained the dominant resonant frequency and the $Q$-factor of the resonator.",
"arxiv_id": "physics/0506087",
"authors": [
"Neven Simicevic"
],
"categories": [
"physics.bio-ph",
"physics.med-ph"
],
"doi": "10.1088/0031-9155/50/21/007",
"title": "Three-Dimensional FDTD Simulation of Biomaterial Exposure to Electromagnetic Nanopulses",
"url": "https://arxiv.org/abs/physics/0506087"
},
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