A cloak is a device capable of minimizing the field scattered and absorbed by an illuminated object. Despite most of the design approaches are based on the well-known “Scattering Cancellation” or “Transformation Optics” techniques, the LEMMA’s researchers pursue the design of invisibility devices by exploiting inverse scattering methodologies.
In [1]-[2], the contrast source inversion(CSI) method is used to this aim. Moreover, the novel and effective concept of ‘quasi-invisibility’ introduced in [1] demonstrates the flexibility of exploiting inverse scattering facilities as design tool. Inverse scattering basics, in particular the diffraction theorem and the concept of degrees of freedom, are also handled to develop a design tool within given approximations of the problem [3] and to give some guidelines for expected invisibility performance [4], respectively.

  1. L. Di Donato, L. Crocco, M. T. Bevacqua, and T. Isernia, “Quasi—Invisibility via inverse scattering techniques,” In Proceedings of IEEE Conference on Antenna Measurements & Applications (CAMA), 2014. [click here]
  2. L. Di Donato, T. Isernia, G. Labate, and L. Matekovits, “Towards printable natural dielectric cloaks via inverse scattering techniques,” Scientific Reports, vol. 7, no. 1, pp. 1-9, 2017. [click here]
  3. R. Palmeri and T. Isernia, “Volumetric invisibility cloaks design through spectral coverage optimization,” IEEE Access, vol. 7, pp. 30860-30867, 2019. [click here]
  4. R. Palmeri, M. T. Bevacqua, and T. Isernia, “Design of invisibility devices through artificial materials: further possible tools from the inverse scattering perspective,” In Proceedings of IEEE International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials), 2019. [click here]