We have computed effective specific absorption rate (SAR) and change in the temperature for a four-layered human-head model when exposed to electromagnetic radiations from a common antenna in mobile phones. Human head is modeled as having four layers of skin, fat, bone, and brain. A realistically shaped human-head model is used in contrast to an oval-shaped model. The SAR and change in temperature is computed as a function of the distance of the antenna from the head at 900 and 1200 MHz. It was found that increasing the distance of the antenna from the head from 1 to 2 cm can significantly decrease the absorbed power in different tissues.
The excitation of the surface-plasmon-polariton (SPP) waves in the prism-coupled configuration is commonly implemented in Turbadar–Kretschmann–Raether (TKR) configuration, where the prism is attached to a metallic thin film and the columnar thin film (CTF) is present on the opposite side of the metallic film. We present the results of excitation of SPP waves in the alternative prism-coupled configuration, that is, the Turbadar–Otto configuration where the prism is affixed to the CTF. Comparison of the Turbadar–Otto and the TKR configuration showed that the absorption peaks in the angular spectrum are narrower and easier to discern in the former than the latter configuration. The computations also showed the usefulness of the Turbadar–Otto configuration for the optical sensing of a fluid infiltrating the void regions of the CTF.
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