期刊
ACS PHOTONICS
卷 6, 期 5, 页码 1248-1254出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.9b00184
关键词
direct laser writing; two-photon lithography; chemical vapor deposition; chalcogenide materials; photonic bandgap; three-dimensional photonic crystals
类别
资金
- Engineering and Physical Sciences Research Council (EPSRC) [EP/M009033/1, EP/M008487/1, EP/M024458/1, EP/N00762X/1]
- EPSRC [EP/N00762X/1, EP/M009033/1, EP/M008487/1, EP/M024458/1] Funding Source: UKRI
Three-dimensional complete photonic bandgap materials or photonic crystals block light propagation in all directions. The rod-connected diamond structure exhibits the largest photonic bandgap known to date and supports a complete bandgap for the lowest refractive index contrast ratio down to n(high)/n(low) similar to 1.9. We confirm this threshold by measuring a complete photonic bandgap in the infrared region in Sn-S-O (n similar to 1.9) and Ge-Sb-S-O (n similar to 2) inverse rod-connected diamond structures. The structures were fabricated using a low-temperature chemical vapor deposition process via a single-inversion technique. This provides a reliable fabrication technique of complete photonic bandgap materials and expands the library of backfilling materials, leading to a wide range of future photonic applications.
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