Plasmonic nanotechnology for photothermal applications – an evaluation

• A. R. Indhu,
• L. Keerthana and
• Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

• , nanomaterials are used in conjunction with a phase-change material for energy storage applications, and when plasmonic nanoparticles are integrated into a solid phase-change material (n-PCM), the energy balance equation is be given by [94]: ΔHfus is the heat of fusion, ρs is the density of solid, ϕ is the

A super-oscillatory step-zoom metalens for visible light

• Yi Zhou,
• Chao Yan,
• Peng Tian,
• Zhu Li,
• Yu He,
• Bin Fan,
• Zhiyong Wang,
• Yao Deng and
• Dongliang Tang

Beilstein J. Nanotechnol. 2022, 13, 1220–1227, doi:10.3762/bjnano.13.101

• tool for label-free super-resolution microscopic imaging and optical precision machining. Keywords: geometric phase; phase-change material; step-zoom lens; super-oscillatory; Introduction Due to the diffraction limit, conventional optical imaging systems are unable to surpass a theoretical resolution

Thermal energy storage – overview and specific insight into nitrate salts for sensible and latent heat storage

• Nicole Pfleger,
• Thomas Bauer,
• Claudia Martin,
• Markus Eck and
• Antje Wörner

Beilstein J. Nanotechnol. 2015, 6, 1487–1497, doi:10.3762/bjnano.6.154

• consumption. This review focuses mainly on material aspects of alkali nitrate salts. They include thermal properties, thermal decomposition processes as well as a new method to develop optimized salt systems. Keywords: eutectic mixture; molten salt; nitrate; phase change material; thermal decomposition

Optical near-fields & nearfield optics

• Alfred J. Meixner and
• Paul Leiderer

Beilstein J. Nanotechnol. 2014, 5, 186–187, doi:10.3762/bjnano.5.19

• of both the nanostructure itself by local melting and the substrate by ablation at the positions of the hot spots may be used. The interaction of plasmonic structures with their surroundings can be employed to tune their optical properties, e.g., by using a dielectric phase change material like

Controlling the near-field excitation of nano-antennas with phase-change materials

• Tsung Sheng Kao,
• Yi Guo Chen and
• Ming Hui Hong

Beilstein J. Nanotechnol. 2013, 4, 632–637, doi:10.3762/bjnano.4.70

• plasmonic resonators placed on a thin film of phase-change material can be selectively excited, generating isolated near-field energy hot-spots with selective excitation under a monochromatic plane wave illumination. Unlike other proposed techniques, our method for energy hot-spot positioning is based on a

• five gold nano-antennas with deep subwavelength spacing and an underlying thin layer of Ge2Sb2Te5 (GST) phase-change material supported by a transparent quartz substrate. In simulation, the gradually varying lengths of the antennas l are 120, 135, 150, 180, and 218 nm from the shortest to the longest

• the antennas are 40 nm, while the centre-to-centre distance d between the nearest neighbouring antenna is 100 nm. Results and Discussion The underlying GST thin film is a phase-change material that has been widely applied in commercial optical disks, optical switchers and phase-change memory [18][19