Analytical Model For Coherent Perfect Absorption In One-Dimensional Photonic Structures
Abstract
Coherent perfect absorption (CPA) is the phenomenon where a linear system with low intrinsic loss strongly absorbs two incident beams but only weakly absorbs either beam when incident separately. We present an analytical model that captures the relevant physics of CPA in one-dimensional photonic structures. This model elucidates an absorption-mediated interference effect that underlies CPA - an effect that is normally forbidden in Hermitian systems but is allowed when conservation of energy is violated due to the inclusion of loss. By studying a planar cavity model, we identify the optimal mirror reflectivity to guarantee CPA in the cavity at resonances extending in principle over any desired bandwidth. As a concrete example, we design a resonator that produces CPA in a 1-μm-thick layer of silicon over a 200-nm bandwidth in the near-infrared.
Publication Date
12-1-2015
Publication Title
Optics Letters
Volume
40
Issue
23
Number of Pages
5550-5553
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1364/OL.40.005550
Copyright Status
Unknown
Socpus ID
84959440750 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84959440750
STARS Citation
Villinger, Massimo L.; Bayat, Mina; Pye, Lorelle N.; and Abouraddy, Ayman F., "Analytical Model For Coherent Perfect Absorption In One-Dimensional Photonic Structures" (2015). Scopus Export 2015-2019. 1005.
https://stars.library.ucf.edu/scopus2015/1005