関連する実験動画
Updated: Sep 9, 2025

10:40
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
7.6K
トポロジカルフォトニック波導体モードによるダイアモンド形の窒素空白センターの放出
Raman Kumar1, Chandan1,2, Gabriel I López Morales1
1Department of Physics, CUNY - The City College of New York, New York, NY, USA.
Nature nanotechnology
|August 28, 2025
まとめ
研究者は,トポロジカルな波導体と相互作用する室温の窒素空白 (NV) センターを研究するために,スキャニングダイヤモンドナノ結晶を使用した. これはナノ構造の光場を明らかにし 量子光学装置の可能性を高めます
科学分野:
- 量子光学
- トポロジックフォトニクス
- 材料科学
背景:
- 単光子発射器を光子構造に統合する進歩は,それらの相互作用の詳細な特徴づけを必要とします.
- ダイヤモンドの窒素空白 (NV) センターは,量子アプリケーションのための有望な単光子エミーターです.
研究 の 目的:
- 室温のNVセンターと近辺のトポロジック波導体との相互作用を調査する.
- NVセンターをローカル光源として使用して波導体帯域幅と光伝播方向性を特徴付ける.
主な方法:
- NVセンターを含む ダイヤのナノクリスタルを使用した
- トポロジカル・ウェーブガイドで近地結合効果を検出するためにNV光発光を用いた.
- NV放射のスペクトル形と偏振を分析した.
主要な成果:
- 波導体特徴化のための効率的な局所的,スペクトルの広い光源としてNVセンターを実証した.
- NV光発光スペクトルと円性に対する近場結合の有意な影響が観察された.
- >50%のコントラストと亜ナノ粒子の空間解像度を持つナノ構造の光場を明らかにした.
結論:
- この研究は,NV色センターの感知方法を拡張します.
- シングルフォトンエミッターの操作と読み取りのためにトポロジックフォトニクスを使用するオンチップ量子光学デバイスの機会を強調します.
関連する概念動画
The de Broglie Wavelength
26.3K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
26.3K
Standing Waves in a Cavity
1.0K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.0K
Molecular Spectroscopy: Absorption and Emission
3.4K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
3.4K
Atomic Spectroscopy: Absorption, Emission, and Fluorescence
1.3K
Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
1.3K
UV–Vis Spectroscopy: Molecular Electronic Transitions
1.8K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
1.8K
Electromagnetic Waves in Matter
3.3K
Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
3.3K

