From modal control to spontaneous emission and gain in photonic crystal waveguides

Bénisty, Henri; David, Aurélien; Martinelli, Lucio; Viasnoff-Schwoob, E.; Weisbuch, C.; Duan, G.-H.; Janiak, K.; Heidrich, H.

doi:10.1016/j.photonics.2005.10.002

Cited by 14 publications

(8 citation statements)

References 18 publications

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“…In practice, if one retains PhC claddings that are unmodified and that consist of circular air holes in a triangular arrangement, there are only small regions of the TM polarization, i.e., E along the hole axis, where we could spot flatband regions. This explains that in spite of a high interest that has been directed toward multimode PhCWGs, including for slow light and related phenomena [23,24,34], no actual strong systematic flattening of the kind reported here has been noticed.…”

Section: (A) and 3(b) Extension Tomentioning

confidence: 48%

“…• Slow light in PhCs has motivated intense investigation in W1 membrane systems [19][20][21], but some studies tackled slow light in larger guides such as W2 and W3 [22,23]. Meanwhile, our group has also pioneered the use of MSBs and a kind of slow light for demultiplexing devices [14,24,25]. How much does our generic approach apply when reducing W (toward low mode numbers m) and thus violating the equidistant-mode assumption?…”

Section: Broad Periodic Waveguidesmentioning

confidence: 99%

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Slow-light regime and critical coupling in highly multimode corrugated waveguides

et al. 2008

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Large and periodically corrugated optical waveguide structures are shown to possess specific modal regimes of slow-light propagation that are easily attainable. The very multimode nature of the coupling is studied by employing coupled-mode theory and the plane-wave expansion method. Given a large enough light cone, associated with a surrounding medium with low enough refractive index, we notably identify a critical slowdown regime with an interesting bandwidth-slowdown product. Essential features of these original systems are further explored: the nature of the coupled modes, the role of gain, symmetry effects, polarization, and relation with photonic-crystal systems. Practical systems are introduced using finite-difference time-domain methods, which provides first-order rules for the use of the above phenomena and their implementation in devices.

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Section: (A) and 3(b) Extension Tomentioning

confidence: 48%

Section: Broad Periodic Waveguidesmentioning

confidence: 99%

Slow-light regime and critical coupling in highly multimode corrugated waveguides

et al. 2008

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“…Dowling et al 12 suggested that the slow down of light near the edge of a one-dimensional photonic bandgap structure could be used to enhance the gain coefficient. The slow propagation of the Bloch mode near the band edge, which may be visualized as multiple back-and-forth scattering of the light beam, thus lengthens the local dwell time in the medium and increases the spatial but not the temporal gain coefficient 13 . Despite obvious applications in optical amplifiers 14,15 and lasers 16 , there is no conclusive experimental demonstration in a waveguide structure.…”

mentioning

confidence: 99%

“…The slow propagation of the Bloch mode near the band edge, which may be visualized as multiple back-and-forth scattering of the light beam, thus lengthens the local dwell time in the medium and increases the spatial but not the temporal gain coefficient. 15 Despite obvious applications in optical amplifiers 16 and lasers, 13 there is no conclusive experimental demonstration in a waveguide structure. For dye-doped 3D artificial opals, enhancement of gain in certain crystallographic directions and its relation to the directional density of optical states was demonstrated 17 and in Ref.…”

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confidence: 99%

Slow-light-enhanced gain in active photonic crystal waveguides

Lunnemann

Chen

et al. 2014

Nat Commun

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Passive photonic crystals have been shown to exhibit a multitude of interesting phenomena, including slow-light propagation in line-defect waveguides. It was suggested that by incorporating an active material in the waveguide, slow light could be used to enhance the effective gain of the material, which would have interesting application prospects, for example enabling ultra-compact optical amplifiers for integration in photonic chips. Here we experimentally investigate the gain of a photonic crystal membrane structure with embedded quantum wells. We find that by solely changing the photonic crystal structural parameters, the maximum value of the gain coefficient can be increased compared with a ridge waveguide structure and at the same time the spectral position of the peak gain be controlled. The experimental results are in qualitative agreement with theory and show that gain values similar to those realized in state-of-the-art semiconductor optical amplifiers should be attainable in compact photonic integrated amplifiers.

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“…The preliminary experiments of Fig.12 exemplify this operation : we started from a wide open section of "W15" PhCW which lases in lateral modes, as we recently reported 33 . We created the gain region by photopuming (using ~40 mW focused from a red laser diode with cylindrical optics).…”

Section: Gain Enhancement and Nonlinear Effectsmentioning

confidence: 64%

Role of one-dimensional singularities in the operation of some photonic-crystal based devices

et al. 2006

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Waveguides in photonic crystals are one-dimensional photonic systems, with a richer basic physics than micro/nanocavities thanks to their extended nature. We evidence various roles of the one-dimensional singularities that occur at zero-group velocity points dispersion relations and mode anticrossings : One role is the demultiplexing in a space-localized fashion, combining properties of the Fabry-Perot and grating dispersive devices in a miniature footprint. Various aspects of the realization of such devices will be presented, towards WDM or coarse WDM applications in the framework of the European FUNFOX project. Another role is the possibility to enhance gain in inverse proportion of the slowed-down group velocity. A third possibility is to produce a Purcell effect and thus a shorter lifetime for emitters embedded in such waveguides. This last possibility raises the prospect of an integrated high efficiency source with controlled photon modes.

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From modal control to spontaneous emission and gain in photonic crystal waveguides

Cited by 14 publications

References 18 publications

Slow-light regime and critical coupling in highly multimode corrugated waveguides

Slow-light regime and critical coupling in highly multimode corrugated waveguides

Slow-light-enhanced gain in active photonic crystal waveguides

Role of one-dimensional singularities in the operation of some photonic-crystal based devices

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