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Poseidonho
- 12
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I found a lot the the surface plasmon on prism geometry are using gold for metal film, and part of it are using silver. Why we need use gold or sivler as a metal film, is it about the condutivity?
Gold and silver have unique optical properties that make them ideal candidates for surface plasmon applications. They both have a high electron density which allows for strong interaction with light, and their electrons are easily excited to create plasmons. Additionally, gold and silver have low resistivity and high reflectivity, making them efficient at transmitting and reflecting light.
While gold and silver are the most commonly used metals for surface plasmon films, other metals such as copper, aluminum, and titanium can also be used. However, they may not have the same optical properties as gold and silver, and their performance may vary depending on the specific application.
The choice of metal for surface plasmon films depends on various factors such as the desired plasmon frequency, the type of light being used, and the specific application. Some metals may be more suitable for certain frequencies or wavelengths of light, while others may have better performance in specific environments.
While gold and silver have many desirable properties for surface plasmon applications, they also have some drawbacks. They are both expensive and can be difficult to fabricate into thin films with precise thicknesses. Additionally, their properties can be affected by environmental factors such as oxidation.
Researchers typically consider the specific requirements and goals of their study, such as the desired plasmon frequency and the type of light being used. They may also perform simulations or experiments using different metals to determine which one will provide the best results for their particular application.