Results show the magnetic mirror behavior at optical wavelengths using dielectric metasurfaces.OvertonGailLaser Focus World: The Magazine for the Photonics & Optoelectronics Industry
Later, the researchers found that the magneto-crystalline anisotropy of rare earth elements (terbium, dysprosium, etc.) and transition metals (iron, etc.) requires a larger driving magnetic field. Terfenol-D, giant magnetostrictive material (GMM) of Tb0.27Dy0.73Fe1.95 was developed [26], and ...
In this chapter we mainly focus on optically transparent materials, although metals and other opaque materials can play an important role as mirrors, absorbers, or electrical contacts for optical MEMS structures. Some of the most important optical materials are crystalline silicon dioxide (SiO2, ...
This is possible by patterning a metal film in such a way that the ratio of the electric over the magnetic field at the surface becomes extremely high. Such a surface was found to naturally avoid the undesirable shorting of an electric dipole antenna placed in close proximity to a high-...
of 2π. This imposes a limitation on the cavity thickness to accumulate the required phase. Our approach to overcome this limitation is to place a metasurface inside the two mirrors which induces a strong phase shift and compensates for the reduced accumulated phase in the rest of the cavity....
A quantum mechanical approach, such as density functional theory (DFT), can also be employed to investigate the optical, optoelectronic, catalytic, and magnetic properties of nanoparticles [55]. This method is particularly useful for studying the electronic structure of metal nanoparticles, which are ...
The lift-off technique has been used for patterns of noble metals (i.e., Pt and Ir) [86]. The fabrication of pumps, valves, and other microfluidic components is contingent on bulk micromachining to create microscopic 3D structures in a silicon substrate [86,88]. For 3D structures, some ...
each comprising an alloy of rare earth and transitional metals as taught by Chaudhari et al., U.S. Pat. No. 3,949,387. This heating enables magnet coil 48 or 129 generated magnetic bias field to direct the remnant magnetization to a desired direction of magnetization as the spot cools bel...
From the days of the early lens grinders, bulk optics manufacturers have focused on bringing real-world images to the human eye. As a result, traditional bulk optical elements — lenses, mirrors and filters — have been optimized to handle visible wavelengths for visual purposes and built on a...
Important developments included Isaac Newton's design of a reflecting telescope that used mirrors to reduce aberration in 1668. Innovations during the eighteenth century largely reduced aberration and distortion in both telescopes and microscopes, resulting in apparatus that closely resembled the ...