Open AccessChirped dual periodic structures for photonic Bloch oscillations and Zener tunneling
Author(s) -
J. O. Estevez,
J. Arriaga,
E. Reyes-Ayona,
Vivechana Agarwal
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.016500
Subject(s) - bloch oscillations , quantum tunnelling , condensed matter physics , superlattice , photonics , scattering , materials science , reflection (computer programming) , zener diode , photonic crystal , optics , physics , quantum mechanics , voltage , computer science , resistor , programming language
Experimental evidence of photon Wannier-stark ladders (WSLs) and Zener tunneling (ZT) in one dimensional dual-periodical (DP) optical superlattices based on Porous Silicon (PSi), is presented. An introduction of linear gradient in physical thickness of the layers, composed of five stacks of two different periodic substructures, resulted in the appearance of four WSLs resonances and resonant Zener tunneling of nearest resonances of two consecutive WSLs. Theoretical analysis of time-resolved reflection spectra as a function of gradient reveals the presence of photonic Bloch oscillations (BOs) and an eventual tunneling at a specific value of linear gradient (20%), has been demonstrated through scattering maps. Measured reflection from different DP photonic structures confirm the presence of minibands, WSLs and ZT in the near infrared region.