Abstract
We continue our investigation of transmission eigenvalues for spherically stratified media. In particular, in the case when the index of refraction n(r) is such that , we establish conditions on n(r) to guarantee that there exists an infinite number of complex transmission eigenvalues and when
, we establish very weak conditions on n(r) to guarantee the existence of complex transmission eigenvalues.
Acknowledgements
There is a vast literature on the transmission eigenvalue problem and for a sample of this research and further references we refer reader to [Citation16–Citation22].
Notes
No potential conflict of interest was reported by the authors.