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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Published on: November 30, 2012

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設計された点欠陥を持つ3次元光学フォトニック結晶.

Minghao Qi1, Elefterios Lidorikis, Peter T Rakich

  • 1Centre for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. mqi@alum.mit.edu

Nature
|June 4, 2004
PubMed
まとめ

研究者らは,層対層リトグラフィー法を使用して,統合された微小穴を持つ3Dフォトニック結晶を製造しました. これらの光子結晶は,通信波長で動作し,光学デバイスの統合を可能にします.

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A crystal's internal structure is an orderly array of atoms, ions, or molecules, and the details of this array significantly influence the solid's properties. In a crystal, periodically repeating 'structural motifs' - which could be atoms, molecules, or groups thereof - create a 'space lattice.' This is essentially a three-dimensional, infinite array of points, each surrounded by its neighbors in an identical way, forming the basic structure of the crystal.A 'unit cell' is a theoretical...
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Crystallographic point groups represent the various symmetry operations that can occur within crystals. They are unique in that at least one point will always remain unchanged during these actions. For instance, consider the triclinic system. This system, devoid of any axis or plane of symmetry, aligns with the C1 and Ci point groups.where Cᵢ is characterized solely by a center of inversion.Contrastingly, the monoclinic system introduces an element of symmetry. This system with one plane...
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Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
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