Surface-plasmon-polariton (SPP) launchers, which can couple the free space light to the SPPs on the metal surface, are among the key elements for the plasmonic devices and nano-photonic systems. Downscaling the SPP launchers below the diffraction limit and directly delivering the SPPs to the desired subwavelength plasmonic waveguides are of importance for high-integration plasmonic circuits. By...

As the web grows and the amount of traffics on the web server increase, problems related to performance begin to appear. Some of the problems, such as the number of users that can access the server simultaneously, the number of requests that can be handled by the server per second (requests per second) to bandwidth consumption and hardware utilization like memories and CPU. To give better quali...

A gyrotron internal mode converter consists of a launcher that radiates the waveguide mode as a nearly Gaussian beam in free space, followed by a set of mirrors to focus and direct the radiation. We present a calculation of the radiation from the launcher based on a quasi-optical approach that includes diffraction. The results are in good agreement with a calculation using a numerical code base...

oscillations may have a negative influence on the unguided rocket firing precision, it is necessary to evaluate the exactly influence of the disturbance factors on the rocket movement upon the launcher. This study presents the equations of the rocket movement upon the launcher under the disturbance factors action, taking into consideration that the rocket is the integrated part of the rocket-la...

This paper illustrates the main results achieved in the context of a project, financed by the Italian Space Agency, concerning the modelling and control of next generation small conventional space launchers. The first part of the paper describes the mathematical translational model of the launcher. Then the derivation of the optimal trajectory to be tracked by the launcher will be illustrated. ...

A comparative study of the radiation-induced magnetoresistance oscillations in the high mobility GaAs/AlGaAs heterostructure two dimensional electron system (2DES) under linearly- and circularly- polarized microwave excitation indicates a profound difference in the response observed upon rotating the microwave launcher for the two cases, although circularly polarized microwave radiation induced...