Terahertz wave behaviours in ceramic and metal structures fabricated by spatial joining of micro-stereolithography

Creation of Titania Artificial Interfaces with Geometric Patterns by Using Microstereolithography and Aqueous Solution Techniques

“…[10][11][12][13] Utilizing this system, diamond lattice-type photonic crystals with three-dimensional periodic arrangements of micrometer-order ceramic or metal lattices were fabricated successfully to exhibit the forbidden gaps through the Bragg diffraction in the frequency range of terahertz waves. [14][15][16][17][18][19][20] The photonic band-gap formations in experimental measurements showed good agreement with theoretically calculated results obtained by using the plane-wave expansion method. The terahertz waves are known to resonate with various types of saccharide or protein molecules, and they are expected to control the syntheses of biological material through the frequency excitements.…”

“…Microstereolithography using a computer‐aided design and manufacturing (CAD/CAM) system was newly developed by our group in order to realize a spatially structured joining of ceramic or metal components on the order of micrometers to control terahertz waves effectively . Utilizing this system, diamond lattice‐type photonic crystals with three‐dimensional periodic arrangements of micrometer‐order ceramic or metal lattices were fabricated successfully to exhibit the forbidden gaps through the Bragg diffraction in the frequency range of terahertz waves . The photonic band‐gap formations in experimental measurements showed good agreement with theoretically calculated results obtained by using the plane‐wave expansion method.…”

Influence of debinding and sintering conditions on the composition and thermal conductivity of copper parts printed from highly loaded photocurable formulations

“…Digital Light Processing (DLP) technology, based on the photopolymerization reaction of a resin, is known for the printing of polymer [4][5][6] and ceramic objects [7][8][9] and is being developed for metal structures [10][11][12][13][14]. The process of manufacturing a metal part using this printing technology includes four steps like for ceramics.…”

Selected Emerging Opportunities for Ceramics in Energy, Environment, and Transportation

“…Chen, Kirihara, and Miyamoto have fabricated a 3‐dimensional ZrO 2 ‐toughened Al 2 O 3 ceramic‐resin photonic crystal via sintering with a lattice constant of 500 μm, a forming resolution of 10 μm, and a full bandgap along three different directions. Kirihara, Niki, and Kaneko have used a microstereolithography system to fabricate a 3‐dimensional diamond structure made of metal (copper) and ceramics (alumina). Point defects consisting of air cubic cavity or plane defects between twinned diamond structures can be introduced to obtain localized modes in these crystals in agreement with transmission line modeling data, showing that these ceramic structures can potentially be used to actively control THz waves.…”