The effect of polarization on the propagation distance of leaky guided modes

Abstract

We show that transverse-magnetic (TM) leaky modes can propagate further than transverse electric (TE) modes in real-index dielectric waveguides. We compute the density of states and find that while the TE spectrum contains only overlapping resonances, the TM spectrum typically contains several isolated peaks. By transforming the TM equation into a Schrödinger-type equation, we show that these isolated peaks arise due to $\delta$-function barriers at the core-cladding interface. Our theory is useful for a range of applications, including filtering TM modes from initially unpolarized light and transferring information between distant waveguides.

7 pages, 4 figures

References in corpus (3)

• Visualization of Branch Points in PT-Symmetric Waveguides
• Reversing the Pump-Dependence of a Laser at an Exceptional Point
• General Theory of Spontaneous Emission Near Exceptional Points

Cited by in corpus (3)

• Probing bulk topological invariants using leaky photonic lattices
• Linking scalar elastodynamics and non-Hermitian quantum mechanics
• Photonic potential for TM waves