EFFECT OF A GEOMETRIC DEFECT ON LIGHT PROPAGATION THROUGH A COMPOSITE LINEAR PHOTONIC LATTICE

Abstract

In this paper we investigated numerically light beam propagation through a one-dimensional composite photonic lattice composed of two structurally different lattices, with a geometric defect emerging at the interface between the two of them. Depending on the initial light beam position with respect to the geometric defect and the transverse tilt of the input beam, different dynamical regimes have been identified. Presented results may be useful for different applications, such as blocking, filtering and transporting light beams through optical media.

UTICAJ GEOMETRIJSKOG DEFEKTA NA PROSTIRANJE SVETLOSTI KROZ KOMPOZITNU LINEARNU FOTONSKU REŠETKU

U ovom radu, numerički je proučavano prostiranje svetlosnog snopa kroz jednodimenzionalnu fotonsku rešetku sastavljenu od dve strukturno različite rešetke. Spoj te dve rešetke je predstavljao geometrijski defekt. U zavisnosti od početnog položaja snopa i njegovog nagiba u odnosu na geometrijski defekt, prepoznati su različiti dinamički režimi. Rezultati predstavljeni ovde mogu biti korisni u različitim oblastima primene, kao što je blokiranje, filtriranje i prenošenje svetlosnog signala kroz optičke sredine.

HIGHLIGHTS

• The influence of a geometric defect (GD) on the propagation of a light beam across a linear composite lattice was investigated
• The influence of the asymmetric structure of the composite lattice was recognized in the evolution of a beam launched close to the area of GD;
• Depending on the initial beam parameters (initial position and transverse tilt), different regimes of light propagation were identified;
• Regimes of reflection and reflection and trapping, i.e. blocking of the beam by GD, could be phenomenologically associated with the Fano resonance;
• The results may be useful for different applications, such as blocking, filtering and transporting light beams through optical media.

·       

·         The influence of a geometric defect (GD) on the propagation of a light beam across a linear composite lattice was investigated;

·         The influence of the asymmetric structure of the composite lattice was recognized in the evolution of a beam launched close to the area of GD;

·         Depending on the initial beam parameters (initial position and transverse tilt), different regimes of light propagation were identified;

·         Regimes of reflection and reflection and trapping, i.e. blocking of the beam by GD, could be phenomenologically associated with the Fano resonance;

The results may be useful for different applications, such as blocking, filtering and transporting light beams through optical media.