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関連する概念動画

Semiconductors01:22

Semiconductors

1.7K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
1.7K
Types of Semiconductors01:20

Types of Semiconductors

1.6K
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
1.6K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

709
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
709

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関連する実験動画

Updated: Feb 26, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

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ハーモニック高光電子機器用の半導体

Murat Sivis1,2, Marco Taucer3, Giulio Vampa3

  • 1Joint Attosecond Science Laboratory, National Research Council of Canada and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada. msivis@uni-goettingen.de.

Science (New York, N.Y.)
|July 22, 2017
PubMed
まとめ

研究者は高ハーモニー生成を制御するために 固体材料を設計し 2秒間に合わせた科学アプリケーションを可能にしました この突破により 光と物質の相互作用を 精密に制御できます

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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
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Patterning via Optical Saturable Transitions - Fabrication and Characterization
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Patterning via Optical Saturable Transitions - Fabrication and Characterization

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関連する実験動画

Last Updated: Feb 26, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
10:54

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Published on: July 8, 2013

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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

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Patterning via Optical Saturable Transitions - Fabrication and Characterization
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Patterning via Optical Saturable Transitions - Fabrication and Characterization

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科学分野:

  • 固体物理学
  • アットセカンド科学
  • ナノフォトニクス

背景:

  • ガスにおける高調和生成 (HHG) は,第2次科学の先駆者となった.
  • 固体中のHHGは超高速光譜と光生成のための新しい道を提供します.

研究 の 目的:

  • ナノ構造とイオンインプラント半導体における高調和生成の探索と制御.
  • 固体材料でHHGの局所的調整を実証する.

主な方法:

  • HHGメディアとしてナノ構造とイオンインプラント半導体を使用した.
  • 波長選択型顕微鏡画像を用いて,ハーモニック放射をマッピングした.
  • 生成媒介とドライビングフィールドに合わせた材料の組成と形状を改造した.

主要な成果:

  • 固体内のHGを局所的に制御し,材料の性質を変更する.
  • オーダーメイドの高ハーモニー波場を225nmまで生成した.
  • シリコンフレネルゾーンプレートターゲットを用いて,1マイクロメートルのスポットサイズに自己フォーカスを示した.

結論:

  • 精密に設計された固体標的は ハーモニック技術の高度な制御を可能にします
  • 固体HHGは,超高速科学に合わせた光場を生成するための多用途のプラットフォームを提供します.