Related Experiment Video
Updated: Feb 3, 2026
09:29
Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
12.7K
Ultrathin Bimetal Color Filter Based on Plasmonic Nanostructure
Jing Wang1, Ruiying Shi1, Linlong Tang2
1College of Physical Science and Technology, Sichuan University, Chengdu 610065, China.
Journal of Nanoscience and Nanotechnology
|October 18, 2018
Summary
Researchers developed a novel bimetal nanostructured film for plasmonic subtractive color filters. This ultrathin film overcomes silver film discontinuity, achieving high transmission (>80%) and tunable colors like cyan, magenta, and yellow.
Area of Science:
- Nanophotonics
- Plasmonics
- Optical Materials
Background:
- Ultrathin silver (Ag) films are used for plasmonic subtractive color filters, offering durability, color tunability, and high transmission.
- However, Ag film discontinuity below 15 nm limits transmission efficiency.
Purpose of the Study:
- To demonstrate a bimetal ultrathin (~10 nm) subtractive color filter with one-dimensional nanogratings.
- To enhance transmission efficiency and overcome fabrication challenges associated with ultrathin Ag films.
Main Methods:
- Fabrication of a bimetal ultrathin film by incorporating an embedded aluminum (Al) layer within the Ag film.
- Utilizing one-dimensional nanogratings to create subtractive color filtering properties.
Main Results:
- A smooth, continuous, and reliable bimetal film was achieved by suppressing Ag island formation with the embedded Al layer.
- A blue shift in the transmission minimum facilitated nanostructure fabrication.
- Color tunability was achieved by varying the Al layer thickness.
- High transmission efficiency exceeding 80% was attained for various colors (cyan, magenta, yellow).
Conclusions:
- The bimetal nanostructured film offers a viable solution to the discontinuity issue in ultrathin Ag films.
- This approach provides a new method for tuning color in plasmonic filters.
- The developed filters exhibit high transmission and a broad color palette, suitable for advanced optical applications.
Related Concept Videos
01:27Passive Filters
1.0K
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
1.0K
01:25Active Filters
1.3K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
1.3K
03:02Colors and Magnetism
14.1K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.1K
01:24Color Vision
1.5K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.5K
01:14Changes in Skin Color: Clinical Perspectives
3.5K
The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
3.5K
01:30Assessment of Airway, Skin Color, and Use of Accessory Muscles
1.7K
A thorough assessment of respiratory health is paramount in clinical settings to identify and manage respiratory distress and ensure adequate oxygenation. This article elaborates on the critical aspects of respiratory evaluation, including airway assessment, skin color examination, and the observation of accessory muscle use, which are integral to effectively diagnosing and managing patients with respiratory conditions.
Introduction
The initial evaluation of a patient's respiratory system...
Introduction
The initial evaluation of a patient's respiratory system...
1.7K