Elliptic cylindrical pseudo-optical black hole for omnidirectional light absorber

Y. Y. Lee, E. S. Kang, K. H. Jung, J. W. Lee, D. Ahn

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


An elliptic cylindrical omnidirectional light absorber forming a pseudo-optical black hole is studied both analytically and numerically. The conditions for permittivity tensors to trap optical rays are obtained from semiclassical analysis of the ray optic Hamiltonian. The dispersive finite-difference time-domain method is used to study the performance of these light-absorbing structures numerically. It is found that the permittivity of the structure in the form (1/sinhu u) ≥ (a/r)n traps the light ray efficiently into the elliptic absorber for n ¡Ý 2, where u is the radial elliptic coordinate and a is the focal distance.

Original languageEnglish
Pages (from-to)1948-1953
Number of pages6
JournalJournal of the Optical Society of America B: Optical Physics
Issue number8
StatePublished - 1 Aug 2014


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