Refractive Index of Gold at Microwave Frequencies

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SUMMARY

The refractive index of pure gold at microwave frequencies, specifically around 2.4 GHz, is a topic of interest for researchers working with nano/microscale particles or thin films. The discussion highlights the challenges of obtaining accurate refractive index values due to the non-linear nature of refractive index plots across different frequency ranges. Participants suggest measuring the conductivity of bulk gold or using optical frequency data for extrapolation, although caution is advised regarding the reliability of such methods without empirical data.

PREREQUISITES
  • Understanding of electromagnetic theory
  • Familiarity with microwave frequency applications
  • Knowledge of refractive index concepts
  • Experience with nano/microscale material characterization
NEXT STEPS
  • Research the refractive index of metals at microwave frequencies
  • Explore methods for measuring conductivity in thin films
  • Investigate the relationship between optical frequency data and microwave properties
  • Learn about electromagnetic field interactions with materials at various wavelengths
USEFUL FOR

Researchers, physicists, and materials scientists focusing on electromagnetic properties of metals, particularly those working with gold at microwave frequencies.

CourtJester035
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Hi, can anyone help me out with the refractive index of pure gold at microwave freguencies? (Specifically something close to 2.4 GHz, or your average household microwave oven)

Much obliged!
 
Last edited:
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As it is a metal, any large piece will be a good reflector. For small parts, it depends on the geometry of the piece. In any way, why do you need the refractive index? Do you expect microwaves traveling within the gold?
 
First off, I am working with either nano/microscale particles or very thin films. I want to know the refractive index because I am looking at the electromagnetic field surrounding various materials at different wavelengths.
 
Maybe you could measureconductivity of bulk gold ? Or extrapolate from optical frequency data ?
 
Last edited:
Thank you for your suggestions, Alkim. Unfortunately, I was hoping to avoid measuring, as we do not have much excess material to make a bulk measurement. As for extrapolating, I thought about this. However, because microwaves are many magnitudes lower in frequency than the visible spectrum and the fact that a refractive index plot is not necessarily linear over that distance, I would be hesitant to accept an extrapolation as being a reasonably close approximation without having any actual data to corroborate.
 
BTW, microwave ovens operate at 1/10 your frequency.
 
marcusl said:
BTW, microwave ovens operate at 1/10 your frequency.

Yes, thank you marcus. This was a typo and should have been 2.4 GHz.
 

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