Evidence of near-infrared partial photonic bandgap in polymeric rod-connected diamond structures

Chen, Lifeng; Taverne, Mike P. C.; Xu, Zheng; Lin, James T.; Oulton, Ruth; López‐García, Martín; Ho, Y.-L. D.; Rarity, John

doi:10.1364/oe.23.026565

Cited by 18 publications

(17 citation statements)

References 49 publications

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“…The main drawback compared to woodpiles is the fabrication difficulty. However, this can be overcome by using DLW [20] and other innovative fabrication techniques [11]. * * * This work was carried out using the computational facilities of the Advanced Computing Research Centre, University of Bristol, Bristol, U.K. and we acknowledge financial support from the ERC advanced grant 247462 QUOWSS and EPSRC grant EP/M009033/1.…”

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confidence: 99%

Modelling defect cavities formed in inverse three-dimensional rod-connected diamond photonic crystals

Taverne¹,

Ho²,

Xu³

et al. 2016

EPL

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PACS 42.70.Qs -Photonic bandgap materials PACS 42.55.Sa -Microcavity and microdisk lasers PACS 42.50.Pq -Cavity quantum electrodynamics Abstract -Defect cavities in 3D photonic crystal can trap and store light in the smallest volumes allowable in dielectric materials, enhancing non-linearities and cavity QED effects. Here, we study inverse rod-connected diamond (RCD) crystals containing point defect cavities using planewave expansion and finite-difference time domain methods. By optimizing the dimensions of the crystal, wide photonic band gaps are obtained. Mid-bandgap resonances can then be engineered by introducing point defects in the crystal. We investigate a variety of single spherical defects at different locations in the unit cell focusing on high-refractive-index contrast (3.3:1) inverse RCD structures; quality factors (Q-factors) and mode volumes of the resonant cavity modes are calculated. By choosing a symmetric arrangement, consisting of a single sphere defect located at the center of a tetrahedral arrangement, mode volumes < 0.06 cubic wavelengths are obtained, a record for high index cavities.

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confidence: 99%

Modelling defect cavities formed in inverse three-dimensional rod-connected diamond photonic crystals

Taverne¹,

Ho²,

Xu³

et al. 2016

EPL

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“…Fabricating our modelled structures would require < 100nm feature sizes and will therefore be very challenging. However, we are actively pursuing 3D fabrication of such structures using DLW and have already seen partial bandgaps in 3D photonic crystals down to 1400nm [60]. The use of smaller wavelengths [61] and new techniques like Stimulated-Emission-Depletion (STED) [62] in DLW might allow even higher writing resolutions and therefore bandgaps at smaller wavelengths.…”

Section: Resultsmentioning

confidence: 99%

Investigation of defect cavities formed in three-dimensional woodpile photonic crystals

Taverne

Rarity

2015

J. Opt. Soc. Am. B

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We report the optimisation of optical properties of single defects in three-dimensional (3D) face-centred-cubic (FCC) woodpile photonic crystal (PC) cavities by using plane-wave expansion (PWE) and finite-difference time-domain (FDTD) methods. By optimising the dimensions of a 3D woodpile PC, wide photonic band gaps (PBG) are created. Optical cavities with resonances in the bandgap arise when point defects are introduced in the crystal. Three types of single defects are investigated in high refractive index contrast (Gallium PhosphideAir) woodpile structures and Q-factors and mode volumes (V ef f ) of the resonant cavity modes are calculated. We show that, by introducing an air buffer around a single defect, smaller mode volumes can be obtained. We demonstrate high Q-factors up to 700000 and cavity volumes down to V ef f < 0.2(λ/n) 3 . The estimates of Q and V ef f are then used to quantify the enhancement of spontaneous emission and the possibility of achieving strong coupling with nitrogen-vacancy (NV) colour centres in diamond.

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“…In this paper, a micro-scale fracture specimen was fabricated by 2PP-DLW [11][12], followed by Ni electrodeposition. Fig.…”

Section: Specimen Preparation and Fabricationmentioning

confidence: 99%

Fabrication of micro-scale fracture specimens for nuclear applications by direct laser writing

et al. 2018

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Evidence of near-infrared partial photonic bandgap in polymeric rod-connected diamond structures

Cited by 18 publications

References 49 publications

Modelling defect cavities formed in inverse three-dimensional rod-connected diamond photonic crystals

Modelling defect cavities formed in inverse three-dimensional rod-connected diamond photonic crystals

Investigation of defect cavities formed in three-dimensional woodpile photonic crystals

Fabrication of micro-scale fracture specimens for nuclear applications by direct laser writing

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