Photonic crystal molecules: tailoring the coupling strength and sign

S. Haddadi 1 Philippe Hamel 1 G. Beaudoin 1 Isabelle Sagnes 1 Christophe Sauvan 2 Philippe Lalanne 3 Juan Ariel Levenson 1 Alejandro Yacomotti 1
1 LPN - Laboratoire de photonique et de nanostructures
2 Laboratoire Charles Fabry / Naphel
LCF - Laboratoire Charles Fabry
3 lp2n-03,lp2n-13
LP2N - Laboratoire Photonique, Numérique et Nanosciences
Abstract : We demonstrate a large tuning of the coupling strength in Photonic Crystal molecules without changing the inter-cavity distance. The key element for the design is the "photonic barrier engineering", where the "potential barrier" is formed by the air-holes in between the two cavities. This consists in changing the hole radius of the central row in the barrier. As a result we show, both numerically and experimentally, that the wavelength splitting in two evanescently-coupled Photonic Crystal L3 cavities (three holes missing in the ΓK direction of the underlying triangular lattice) can be continuously controlled up to 5× the initial value upon ∼ 30% of hole-size modification in the barrier. Moreover, the sign of the splitting can be reversed in such a way that the fundamental mode can be either the symmetric or the anti-symmetric one without altering neither the cavity geometry nor the inter-cavity distance. Coupling sign inversion is explained in the framework of a Fabry-Perot model with underlying propagating Bloch modes in coupled W1 waveguides.
Document type :
Journal articles
Complete list of metadatas

Cited literature [13 references]  Display  Hide  Download
https://hal-iogs.archives-ouvertes.fr/hal-00993238
Contributor : Philippe Lalanne <>
Submitted on : Wednesday, May 21, 2014 - 7:12:35 PM
Last modification on : Thursday, February 1, 2018 - 3:42:04 PM
Long-term archiving on : Thursday, August 21, 2014 - 10:46:43 AM

File

2014_OE_molecule_photonique.pd...
Publisher files allowed on an open archive

Identifiers

Collections

LCFIO | LCF_NAPHEL | IOGS | PARISTECH | LP2N | LP2N_03

Citation

S. Haddadi, Philippe Hamel, G. Beaudoin, Isabelle Sagnes, Christophe Sauvan, et al.. Photonic crystal molecules: tailoring the coupling strength and sign. Optics Express, Optical Society of America, 2014, 22 (10), pp.12359-12368. ⟨10.1364/OE.22.012359⟩. ⟨hal-00993238⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

572

Files downloads

287

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD