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Macroscopic Ag nanostructure array patterns with high-density hotspots for reliable and ultra-sensitive SERS substrates

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Nano Research 2019年第10期12卷 2554-2558页

作者： Taeksu Lee Soongeun Kwon San ghee Jung hyungjun lim Jae-Jong Lee Department of Nano Manufacturing Technology Korea Institute of Machinery and Materials(KIMM)156 Gajeongbuk-RoYuseong-GuDaejeon 34103Republic of Korea

Syn thesis of metal nano structures arrays with large amounts of small nano-gaps on a homoge nous macroscale is of significant in terest and importa nee in chemistry,biotech no logy,physics,and nan otech no logy because of their enhan ced ***,the fabricatio n of uncovered nano-gaps with high-density and uniformity is rather difficult due to the complex and multiple synthetic *** this research,a facile and low-cost approach is demonstraind for the synthesis of high-density small nano-gaps(about 3.4 nm)between silver nanostructure array patter ns(SNAPs)over a large *** nan o?hole patter ns were periodically gen erated over an entire substrate using nano-impri nt *** reacti on at the high over-potential produced multiple silver nano crystals inside the nano-hole patter ns,gen erati ng a high-de nsity of small and un covered ***,we fully dem on strate their applicati on in the rapid detectio n of rhodamine 6G(R6G)molecules by surface-enhaneed Raman scattering(SERS)spectroscopy with a very low detection limit(1 fM)as well as excellent signal uniformity(RSD<8.0%±2.5%),i ndicati ng an extra ordinary capability for single-molecule detecti on.

关键词： nanoImprint lithography surface-enhanced Raman scattering(SERS)spectroscopy electrodeposition nano patterning gold silver

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Aluminum nitride waveguide beam splitters for integrated quantum photonic circuits

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光子学研究:英文版 2023年第7期11卷 1196-1202页

作者： HYEONG-SOON JANG DONGHWA LEE hyungjun HEO YONG-SU KIM HYANG-TAG lim SEUNG-WOO JEON SUNG MOON SANGIN KIM SANG-WOOK HAN HOJOONG JUNG Center for Quantum Information Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of Electrical and Computer Engineering Ajou UniversitySuwon 16499Republic of Korea Division of Nano and Information Technology KIST SchoolKorea University of Science and TechnologySeoul 02792Republic of Korea

We demonstrate integrated photonic circuits for quantum devices using sputtered polycrystalline aluminum nitride(Al N)on ***-chip Al N waveguide directional couplers,which are one of the most important components in quantum photonics,are fabricated and show the output power splitting ratios from 50:50 to 99:*** beam splitters with an extinction ratio of more than 10 d B are also realized from the Al N directional *** the fabricated Al N waveguide beam splitters,we observe Hong–Ou–Mandel interference with a visibility of 91.7%±5.66%.

关键词： waveguide quantum beam

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