Experimental observation of minigap stripes in periodically corrugated broad photonic wires

Khayam, Omer; Bénisty, Henri; Cambournac, Cyril

doi:10.1103/physrevb.78.153107

Cited by 12 publications

(25 citation statements)

References 19 publications

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“…This can be termed "nearLittrow" diffraction. The general resulting situation is what we have termed a stripe of minigaps, 22 appearing clearly in Fig. 1 on one hand, and in Figs.…”

Section: Analogies From Photonic Crystals To Graphene Nanoribbonsmentioning

confidence: 99%

“…We had pointed out in Ref. 22 that a similar phenomena occurred, albeit unnoticed, in recent reports of periodically modulated GNR due to edge reconstruction, 6 and could also arise due to FIG. 4.…”

Section: Generic Effects Of Zgnr Edge Modulationmentioning

confidence: 99%

“…In the optical regime, we have recently been able to visualize a strong DOS modulation associated with these stripes thanks to a specially designed experiment. 22 We elaborate on ways to exploit this further below, going to a "critical coupling regime" 21 ͑already apparent in Fig. 6 but this case is not so analog to Fig.…”

Section: Analogies From Photonic Crystals To Graphene Nanoribbonsmentioning

confidence: 99%

“…In Ref. 22, we had only hinted at the unnoticed appearance of the minigap stripe in the reconstruction study of Ref. 6 and to the relation with the superlattice concepts of Ref.…”

Section: B Prospects Prompted By the Analogymentioning

confidence: 99%

“…20 We furthered this concept by a theoretical study 21 and by an experimental test of the heavily modulated photonic DOS. 22 The core of this effect is the ability of diffraction at the guide edge to localize light along the waveguide, notably if diffraction scatters waves back,. This case is known as Littrow configuration in optics, and much used in spectrometer ͑blazed gratings͒ and external cavity lasers.…”

Section: B Prospects Prompted By the Analogymentioning

confidence: 99%

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Graphene nanoribbons: Photonic crystal waveguide analogy and minigap stripes

Bénisty

2009

Phys. Rev. B

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Graphene nanoribbons are one-dimensional multimode systems with quasilinear electron dispersion. We discuss why they are direct analogs of broad photonic crystal waveguides. Three kinds of dispersion regions found in band structure of the latter ͑Fabry-Perot region, mini-stopband region, and coupled-zone-edge regions͒ are traced to their equivalent in zigzag graphene nanoribbons whose edges are periodically modified. For a superperiod of ϳ1 nm, the zone folding arising across the nearly linear low-energy part of the electronic dispersion induces these equivalent band structures. A last analogy is the capability to induce a form of localization characterized by minigap stripes and collective flatband edges through a limited modification localized within a pair of edge rows of the nanoribbon, representing typically less than 1% of the ribbon atoms.

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“…This can be termed "nearLittrow" diffraction. The general resulting situation is what we have termed a stripe of minigaps, 22 appearing clearly in Fig. 1 on one hand, and in Figs.…”

Section: Analogies From Photonic Crystals To Graphene Nanoribbonsmentioning

confidence: 99%

Section: Generic Effects Of Zgnr Edge Modulationmentioning

confidence: 99%

Section: Analogies From Photonic Crystals To Graphene Nanoribbonsmentioning

confidence: 99%

“…In Ref. 22, we had only hinted at the unnoticed appearance of the minigap stripe in the reconstruction study of Ref. 6 and to the relation with the superlattice concepts of Ref.…”

Section: B Prospects Prompted By the Analogymentioning

confidence: 99%