The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The gain medium coated cylindrical nano particle is presented, in which the core is filled by Ag and obey Drude model, the shell is the gain medium, which was silica doped with rare earth (erbium Er3+) ions, and it obeys the Lorentz model for the relative permittivity. In the optical plane wave, we compared the silver coated gain medium cylindrical nano particle and the gain medium coated Ag cylindrical...
The plane wave scattering from the cooperated active cylindrical coated nano-particle and inverse active cylindrical coated nano-particle were studied numerically. It was found that the maximum peak of the cooperated active cylindrical coated nano-particle and inverse active cylindrical coated nano-particle, −90.217dBsm, is much larger the value, −106.843dBsm, of active cylindrical coated nano-particle...
A novel toroid-structured coated nano particle (T-CNP) antenna with an active core (doped with rare earth ion Er3+) is studied in this paper. It is demonstrated that the active toroid-structured nano particle, when illuminated by an electric Hertzian dipole (EHD) (small current) element, acts as a strong radiator at its resonant frequency (around 600 THz). It is shown that the maximum peak of the...
Plane wave scattering from two closely spaced, closed cylindrical active coated nano particles (CNPs), which have slightly different resonance frequencies, is studied numerically. Although the distance between them is only 0.4λ, the scattering cross-section(SCS) background value of this two-CNP system is increased 5dB when r2 = 15.1 nm and the 3dB SCS bandwidth is 599.95THz–600.1THz, which is a substantially...
The EM polarization properties of the active cylindrical coated nano particle antennas are investigated in the visible frequency band. It is observed that the active cylindrical coated nano particle could be illuminated by plane waves with horizontal polarization or vertical polarization, and show the dipole mode, although the resonant size of the particles are little different. Especially, when the...
CST is a general purpose, computational electromagnetics simulation tool that uses the finite integration technique for its time domain solver. Unfortunately, it does not allow negative ε″ data to be input by a user in the menu window. Consequently, the time domain solver of the current CST version cannot be used to solve the original negative ε″ problem. Here we introduce a manual method to analyze...
A very electrically small, active open cylindrical coated nanoparticle model is constructed, and its electromagnetic properties are investigated in the visible frequency band. Its optical response under both planewave and electric dipole antenna excitations shows very strong dipole behavior at its lowest resonance frequency. The scattering cross section at that dipole resonance frequency is increased...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.