2005
DOI: 10.1002/adma.200401527
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Three‐Dimensional Spiral‐Architecture Photonic Crystals Obtained By Direct Laser Writing

Abstract: ring under atmospheric conditions. TEA (2.2 mL, 99+ %) was slowly added drop by drop to the solution under agitation. After 30±45 min stirring the white product was filtered off, washed with DMF, and was finally dried at 373 K for 3±5 h in an oven. After drying the yield was 71 % in weight with respect to zinc nitrate. The same synthesis was repeated adding three drops of H 2 O 2 (35 %) to the DMF solution containing dissolved BDC and zinc nitrate and then the TEA was added directly to the solution.For the sec… Show more

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Cited by 239 publications
(156 citation statements)
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“…For example, large complete 3D photonic bandgaps have been predicted for high-index-contrast silicon square-spiral structures; [1,2] corresponding experiments using glancing-incidence deposition, [3,4] interference lithography, [5] or direct laser writing [6,7] have been published. In addition to complete gaps or stop bands, theory [8] also predicts polarization stop bands, i.e., stop bands for just one of the two circular polarizations.…”
mentioning
confidence: 99%
“…For example, large complete 3D photonic bandgaps have been predicted for high-index-contrast silicon square-spiral structures; [1,2] corresponding experiments using glancing-incidence deposition, [3,4] interference lithography, [5] or direct laser writing [6,7] have been published. In addition to complete gaps or stop bands, theory [8] also predicts polarization stop bands, i.e., stop bands for just one of the two circular polarizations.…”
mentioning
confidence: 99%
“…These can include functional elements like point and line defects which would be perfectly replicated without additional steps. The fabrication of complex 3D photonic crystals with a complete PBG, like woodpile, slanted-pore, [14] squarespiral, [15,24] diamond-like, gyroid-like, and cubic structures, [10] is now possible with one method. Additionally, our approach allows for precise control of the filling fraction to fine-tune the complete PBG.…”
mentioning
confidence: 99%
“…[3][4][5] The latter, using colloidal crystals as templates, provide photonic crystals; however, their crystal structure is limited to face-centered cubic and quality is compromised by defects. [6][7][8] More recent approaches founded on holographic laser lithography [9,10] and direct laser writing in polymer photoresists [11][12][13][14][15][16] have turned out to fulfill most of the necessary requirements [17] for largescale fabrication of three-dimensional (3D) photonic crystals, facilitating straightforward incorporation of functional defects like waveguides and resonators. [18] Unfortunately, a major obstacle must be overcome before the way is clear to photonic bandgap materials; namely, polymer templates have insufficient refractive-index contrast to open a complete photonic bandgap.…”
mentioning
confidence: 99%
“…Figure 10 shows examples of 3D micro-and nanostructures fabricated using TPP: (a) a 2 × 2 array of planoconvex microlens [64], (b) a photonic bandgap crystal [66], (c) a microturbine that is rotated by application of an external magnetic field [69], (d) fluid-mixing components integrated into an open microfluidic channel [72], (e) a microvalve designed to prevent reflux of blood flow in human veins [73], and (f) a 25-µm pore-sized scaffold for 3D cell migration studies [75].…”
Section: Applicationsmentioning
confidence: 99%
“…The exceptional characteristics of TPP that enable 3D rapid prototyping with nanometric fabrication resolution have been extensively applied to fabricate microoptical components [64], photonic crystals [58,65,66], micro-and nanosystems [67][68][69], microfluidic devices [70][71][72], medical devices [73], and scaffold for tissue engineering [64,73,75]. Figure 10 shows examples of 3D micro-and nanostructures fabricated using TPP: (a) a 2 × 2 array of planoconvex microlens [64], (b) a photonic bandgap crystal [66], (c) a microturbine that is rotated by application of an external magnetic field [69], (d) fluid-mixing components integrated into an open microfluidic channel [72], (e) a microvalve designed to prevent reflux of blood flow in human veins [73], and (f) a 25-µm pore-sized scaffold for 3D cell migration studies [75].…”
Section: Applicationsmentioning
confidence: 99%