[en] We numerically study the diffraction properties of a parity-time (PT) symmetric transmission grating, which
operates through a limited number of guiding modes. The interferometric operation is altered by the introduction
of balanced gain and loss leading, for example, to efficient switching around the spontaneous symmetry breaking
point. Furthermore, we examine the influence of the longitudinal reflections, which are not common in previous
PT structures. In addition, we separately tailor the periodicities of gain and loss, so that the device remains PT
symmetric. However, this gives a new way to control the mode merging phenomenon, as we obtain interactions
between previously distinct modes.
Research center :
CRPM - Physique des matériaux
Disciplines :
Physics
Author, co-author :
Rivolta, Nicolas ; Université de Mons > Faculté des Sciences > Matériaux Micro et Nanophotoniques
Maes, Bjorn ; Université de Mons > Faculté des Sciences > Matériaux Micro et Nanophotoniques
Language :
English
Title :
Diffractive switching by interference in a tailored PT-symmetric grating
Publication date :
08 May 2015
Journal title :
Journal of the Optical Society of America. B, Optical Physics
ISSN :
0740-3224
Publisher :
Optical Society of America, United States - District of Columbia
Volume :
32
Issue :
7
Pages :
1330-1337
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S803 - Matériaux Micro- et Nanophotoniques
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
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