RT Journal Article T1 Condition for resonant optical bistability A1 Malyshev, Andrey AB We address a two-level system in an environment interacting with an electromagnetic field in the dipole approximation. The resonant optical bistability induced by local-field effects is studied by considering the relationship between the population difference and the excitation field. The diversity of various systems is included by accounting for system self-action via the surface part of Green's dyadic in the general form. The bistability condition and the exact solution of the steady-state optical Bloch equations at the absolute bistability threshold are derived analytically. PB American Physical Society SN 1050-2947 YR 2012 FD 2012-12-27 LK https://hdl.handle.net/20.500.14352/42781 UL https://hdl.handle.net/20.500.14352/42781 LA eng NO ©2012 American Physical Society.Support from the project MOSAICO (FIS2006-01485), fruitful discussions with V. A. Malyshev, and the hospitality of the University of Groningen are gratefully acknowledged NO Ministerio de Ciencia e Innovación (MICINN) DS Docta Complutense RD 9 abr 2025