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Non-ohmic Devices

Non-ohmic Devices

In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...

Nonlinear Pharmacokinetics: Causes of Nonlinearity

Nonlinear Pharmacokinetics: Causes of Nonlinearity

Nonlinearity in drug pharmacokinetics is caused by various factors influencing how a drug is absorbed, distributed, metabolized, and excreted. Understanding these nonlinear processes is crucial for predicting drug behavior in the body and optimizing drug dosing regimens.
Nonlinear drug absorption can occur when the process is rate-limited by solubility, carrier-mediated transport systems, or saturation of the presystemic gut wall or hepatic metabolism. For instance, high doses of riboflavin...

Semiconductors

Semiconductors

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...

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Updated: Jan 15, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

プログラム可能なオンチップ非線形フォトニクス

Ryotatsu Yanagimoto^1,2, Benjamin A Ash³, Mandar M Sohoni³

¹School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA. ryotatsu.yanagimoto@ntt-research.com.

|October 8, 2025

まとめ

この要約は機械生成です。

研究者は再構成可能な非線形光学装置を開発しましたこのプログラム可能な光子チップは光のダイナミック制御を可能にし量子と古典技術の固定機能の制限を克服します

さらに関連する動画

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

関連する実験動画

Last Updated: Jan 15, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

科学分野:

フォトニクスと非線形光学
量子技術と古典技術
材料科学

背景:

非線形光学デバイスは光子技術にとって不可欠ですが,通常は製造後に固定された機能を持っています.
この不柔軟性により動的シナリオでの応用が制限されます
既存のデバイスには再構成性がなく,適応光学システムの進歩を妨げています.

研究の目的:

プログラム可能な非線形光学機能を持つ新しい光学装置を提示する.
任意の再構成可能な二次元非線形分布を証明する.
固定機能の非線形光学装置の限界を克服する.

主な方法:

光学スラブ波導体における電場誘発二次非線形感受性 (χ(2) を利用した.
光伝導層と光学プログラミングを使用して,電場を大量に並行して制御する.
第2ハーモニー生成 (SHG) のスペクトル,空間,空間スペクトル工学が実証されている.

主要な成果:

任意に再構成可能な二次元分布の非線形性を達成した.
準相配合格子構造のインサイト逆設計が実証された.
運用と環境の変動を補うためのリアルタイムのフィードバックを紹介しました.

結論:

開発されたデバイスは,非線形光学における従来の1つのデバイス1つの機能のパラダイムを破ります.
プログラム可能な非線形光学は,デバイスの迅速な再構成を必要とするアプリケーションを可能にします.
プログラム可能な量子ゲート,適応光学信号処理,高度なセンシングなどがあります.