Single-material coupling-tolerant semi-planar microresonator using Littrow diffraction

Bénisty, Henri

doi:10.1016/j.photonics.2009.02.001

Cited by 10 publications

(17 citation statements)

References 27 publications

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“…A main difference was that for a triangular corrugation on one side as in [11], the critically coupled regime (CCR) is attained around a height/period h/a ratio much higher than 1.25 [11]. It is rather attained around a ratio of 3.0, or less, h/a~2.5, for a slightly modified shape departing from triangular due to customary lithographic biases.…”

Section: Simulation Results For a Long Devicementioning

confidence: 98%

“…We had already made a design of a resonator based on these slowed-down modes [11]. However it was for one polarization which does not apply to the silicon-on-insulator (SoI) examples discussed below, where the field is coupled by a 1D grating and is called TE in the access guide, i.e.…”

Section: Simulation Results For a Long Devicementioning

confidence: 99%

“…The periodic corrugation has the effect of coupling both sets of modes [12], in a way reminiscent of studies made for LandauZener manipulation of Rydberg atoms in the 90's [15], an analytical description that we are currently investigating. , [8,11,12], the coupled modes dispersion flattens out at the zone edge, being equally pushed downward by higher modes and pushed upward by lower modes. This is the critically coupled regime (CCR).…”

Section: Introductionmentioning

confidence: 98%

“…It also led us to consider multimode coupling per se and to evidence the regime of critical coupling [8,[10][11][12] (see also ICTON 2010 [13]) detailed below. A specific consequence was the ability to put up a recipe for slow light [14].…”

Section: Introductionmentioning

confidence: 99%

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Broad periodic waveguides: Slow light and its reconciliation with cavity modes

Bénisty

Khayam

Piskunov

et al. 2011

2011 13th International Conference on Transparent Optical Networks

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A "slow" high-order mode in a photonic crystal waveguides can be exploited using conversion from a "fast" fundamental mode to achieve demultiplexing. A further interesting slow-light regime of more general broad periodically corrugated waveguides with many modes will be shown: it arises from higher-order modes coupled among themselves and hinges on the familiar Littrow diffraction geometry. We will show some of its less obvious features, notably the "critical coupling" regime for maximal slow down. This "critical coupling" regime induces modes whose transmission closely follows that of multiple Fabry-Perot resonators. Experiments on broad Silicon-on-Insulator waveguides evidencing this regime are shown. We argue that this system reconciles cavity vs. band-edge enhancement and is dual to the popular "CROW" introduced by Yariv in 1999.

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Section: Simulation Results For a Long Devicementioning

confidence: 98%

Section: Simulation Results For a Long Devicementioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Broad periodic waveguides: Slow light and its reconciliation with cavity modes

Bénisty

Khayam

Piskunov

et al. 2011

2011 13th International Conference on Transparent Optical Networks

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“…We previously studied these highly multimode structures (i) for their "Littrow lasing" feature 10 and (ii) for their ability to manifest the phenomena of "multiple slow light" or "critical coupling." [11][12][13][14] These slow modes arise at the crossings of equidistant branches of two dispersion manifolds of opposite slopes. 15 Coupling of modes with proper amounts of transverse and longitudinal momentum 4 thus appears as a generic enabler for dispersion compensation strategies.…”

mentioning

confidence: 99%

Mastered dispersion of material resonators: Broad corrugated waveguides working under the Littrow regime

Bénisty

Piskunov

2013

Applied Physics Letters

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An anomalous dispersion for modes of a material resonator is highly desired to form frequency combs. A resonator free-spectral-range (FSR) controlled by shape so as to increase with frequency ω/2π compensates the normal index dispersion ∂n/∂ω > 0, producing evenly spaced resonances. Only special shapes achieve this scope. We show here that broad periodic corrugated waveguides working at Littrow regime feature such an increasing trend ∂FSR/∂ω > 0. We outline experimentally this trend on silicon-on-insulator devices designed for 45° Littrow operation. We predict dispersion-free silicon-based designs across the 1.4–4.0 μm mid-infrared range.

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