The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. http://dspace-roma3.caspur.it:80 2013-05-25T02:59:35Z 2013-05-25T02:59:35Z Gori, Franco Ramírez-Sánchez, Victoria Santarsiero, Massimo Shirai, Tomohiro http://hdl.handle.net/2307/220 2011-12-22T13:34:56Z 2009-07-31T22:00:00Z

<Title>On genuine cross-spectral density matrices</Title> <Authors>Gori, Franco; Ramírez-Sánchez, Victoria; Santarsiero, Massimo; Shirai, Tomohiro</Authors> <Issue Date>2009-08</Issue Date> <Is part of>Journal of Optics A: Pure and Applied Optics</Is part of> <Volume>11</Volume> <Pages>085706</Pages> <Abstract>For an electromagnetic stochastic beam, the choice of the mathematical structure of the cross-spectral density matrix is limited by the constraint of non-negative definiteness. We present a sufficient condition for building these matrices in such a way that this constraint is automatically satisfied. This allows us to put into evidence that electromagnetic beams can exhibit very peculiar correlation properties, some of which would not be encountered in scalar treatments. These results are illustrated by means of a number of examples.</Abstract>

2009-07-31T22:00:00Z Ramírez-Sánchez, Victoria Piquero, Gemma Santarsiero, Massimo http://hdl.handle.net/2307/219 2011-12-22T13:35:27Z 2009-06-28T22:00:00Z

<Title>Generation and characterization of spirally polarized fields</Title> <Authors>Ramírez-Sánchez, Victoria; Piquero, Gemma; Santarsiero, Massimo</Authors> <Issue Date>2009-06-29</Issue Date> <Is part of>Journal of Optics A: Pure and Applied Optics</Is part of> <Volume>11</Volume> <Pages>085708</Pages> <Abstract>Recently introduced global parameters for describing the polarization of a beam are used to characterize spirally polarized fields, which include as particular cases azimuthally and radially polarized fields. Theoretical predictions about such global parameters are experimentally confirmed by generating beams with spirally polarized transverse patterns, by means of two different procedures.</Abstract>

2009-06-28T22:00:00Z