Embedded cavities and waveguides in three-dimensional silicon photonic crystals

Rinne, Stephanie A.; García-Santamaría, Florencio; Braun, Paul V.

doi:10.1038/nphoton.2007.252

Cited by 288 publications

(233 citation statements)

References 36 publications

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“…8,9 Strongly dispersive periodic structures with dielectric functions that vary on the length scale of the wavelength of light can now be fabricated with impressive precision and resolution. 10,11 By exploiting the close analogies with condensed-matter theory, these so-called photonic crystals can give rise to such optical phenomena as, e.g., enhanced Raman scattering, 12 increased stimulated emission, 7 superprism behavior, 13 and negative refraction. 14 Due to their highly dispersive nature, photonic crystals have emerged as excellent candidates for sources of slow-light phenomena.…”

Section: Limits Of Slow Light In Photonic Crystalsmentioning

confidence: 99%

Limits of slow light in photonic crystals

2008

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While ideal photonic crystals would support modes with a vanishing group velocity, state-of-the art structures have still only provided a slow-down by roughly two orders of magnitude. We find that the induced density of states caused by lifetime broadening of the electromagnetic modes results in the group velocity acquiring a finite value above zero at the band gap edges, while attaining superluminal values within the band gap. Simple scalings of the minimum and maximum group velocities with the imaginary part of the dielectric function or, equivalently, the linewidth of the broadened states, are presented. The results obtained are entirely general and may be applied to any effect which results in a broadening of the electromagnetic states, such as loss, disorder, finite-size effects, etc. This significantly limits the reduction in group velocity attainable via photonic crystals.

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Section: Limits Of Slow Light In Photonic Crystalsmentioning

confidence: 99%

Limits of slow light in photonic crystals

2008

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“…[25][26][27] This technique yields a range of porous inverse opal structures with various chemical compositions including SiO 2 , TiO 2 , and Al 2 O 3 . 4,[28][29][30] Inverse opal matrix materials such as polymer precursors, 31,32 nanoparticles, 33,34 and vapor phase precursors [35][36][37][38][39] have also been deposited by infiltration. These types of synthetic approaches, by their very nature, not only result in fragile, cracked films, but do not allow for precise control of metal nanoparticle content or distribution, yielding non-uniformity in both composition and ensuing properties, and therefore limit their technological potential.…”

Section: Introductionmentioning

confidence: 99%

Three-Phase Co-assembly: In Situ Incorporation of Nanoparticles into Tunable, Highly Ordered, Porous Silica Films

et al. 2013

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We present a reproducible, one-pot colloidal co-assembly approach that results in large-scale, highly-ordered porous silica films with embedded, uniformly-distributed, accessible gold nanoparticles. The unique coloration of these inverse opal films combines iridescence with plasmonic effects. The coupled optical properties are easily tunable either by changing the concentration of added nanoparticles to the solution before assembly or by localized growth of the embedded Au nanoparticles upon exposure to tetrachloroauric acid solution, after colloidal template removal. The presence of the selectively absorbing particles furthermore enhances the hue and saturation of the inverse opals color by suppressing incoherent diffuse scattering. The composition and optical properties of these films are demonstrated to be locally tunable using selective functionalization of the doped opals.

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“…To fabricate a-Si single gyroid structures, we developed a protocol which incorporates multiple steps 2,12,13,23,24 (see Methods for detailed description), as illustrated in Fig. 2 Table S1 for fill fraction values).…”

Section: Resultsmentioning

confidence: 99%

Three-Dimensional Single Gyroid Photonic Crystals with a Mid-Infrared Bandgap

et al. 2016

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ABSTRACT:A gyroid structure is a distinct morphology that is triply periodic and consists of minimal isosurfaces containing no straight lines. We have designed and synthesized amorphous silicon (a-Si) mid-infrared gyroid photonic crystals that exhibit a complete bandgap in infrared spectroscopy measurements. Photonic crystals were synthesized by deposition of a-Si/Al2O3 coatings onto a sacrificial polymer scaffold defined by two-photon lithography. We observed a 100% reflectance at 7.5 µm for single gyroids with a unit cell size of 4.5 µm, in agreement with the photonic bandgap position predicted from full-wave electromagnetic simulations, whereas the observed reflection peak shifted to 8 µm for a 5.5 µm unit cell size. This approach represents a simulation-fabrication-characterization platform to realize three-dimensional gyroid photonic crystals with well-defined dimensions in real space and tailored properties in momentum space.

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Embedded cavities and waveguides in three-dimensional silicon photonic crystals

Cited by 288 publications

References 36 publications

Limits of slow light in photonic crystals

Limits of slow light in photonic crystals

Three-Phase Co-assembly: In Situ Incorporation of Nanoparticles into Tunable, Highly Ordered, Porous Silica Films

Three-Dimensional Single Gyroid Photonic Crystals with a Mid-Infrared Bandgap

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