Nonlinear Spectral Singularities


Hamed Ghaemi
Department of Physics, Koç University


Abstract: The nonlinear spectral singularity arising from a Kerr nonlinearity is explored in [Phys. Rev. A 87, 063838 (2013)]. This reference studies the effect of nonlinearity in lasing condition and shows that Kerr nonlinearity with spectral singularity for a normally incident wave provides an
explanation of lasing at gain coefficient g. Lasing occurs when it exceeds threshold gain g_{0}. For oblique waves, Ref. [Phys. Rev. A 91, 043804 (2015)] looks at the behavior of threshold gain coefficient g_{0} which is given by the condition that there is a linear spectral singularity. In [J. Opt. 19, 105601 (2017)], we investigated imposing the condition of the existence of nonlinear spectral singularity in the TE/TM modes of a mirrorless slab of gain materials and studied the θ-dependence of intensity.

Yer : MSGSÜ Bomonti Binası, Fizik Bölümü
Tarih : 7 Aralık 2017 Perşembe, 15:00