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Metallic nano-structures for polarization-independent multi-spectral filters.

Tang Y, Vlahovic B, Brady DJ - Nanoscale Res Lett (2011)

Bottom Line: Cross-shaped-hole arrays (CSHAs) are selected for diminishing the polarization-dependent transmission differences of incident plane waves.We investigate the light transmission spectrum of the CSHAs in a thin gold film over a wide range of features.It implicates the possibility to obtain a desired polarization-independent transmission spectrum from the CSHAs by designing their parameters.

View Article: PubMed Central - HTML - PubMed

Affiliation: The Department of Physics, North Carolina Central University, Durham, NC, 27707, USA. tangy@nccu.edu.

ABSTRACT
Cross-shaped-hole arrays (CSHAs) are selected for diminishing the polarization-dependent transmission differences of incident plane waves. We investigate the light transmission spectrum of the CSHAs in a thin gold film over a wide range of features. It is observed that two well-separated and high transmission efficiency peaks could be obtained by designing the parameters in the CSHAs for both p-polarized and s-polarized waves; and a nice transmission band-pass is also observed by specific parameters of a CSHA too. It implicates the possibility to obtain a desired polarization-independent transmission spectrum from the CSHAs by designing their parameters. These findings provide potential applications of the metallic nano-structures in optical filters, optical band-pass, optical imaging, optical sensing, and biosensors.

No MeSH data available.


Related in: MedlinePlus

The transmission spectrum of a CSHA. (L = 330 nm, W = 10 nm, h = 250 nm, and D = 350 nm) with different incident angles of 0, 15, 30, and 60.
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Figure 6: The transmission spectrum of a CSHA. (L = 330 nm, W = 10 nm, h = 250 nm, and D = 350 nm) with different incident angles of 0, 15, 30, and 60.

Mentions: It is very important for the CSHAs to have a large incident angle acceptance in the application in the spectral filter field. We vary the incident angle of the plane wave from 0 to 60 in the simulations (L = 330 nm, W = 10 nm, D = 350 nm, and h = 250 nm), these results show that the transmission peaks will stay at the same wavelengths, but the magnitudes of the peaks will decrease slightly for larger angles (see Figure 6), and this slightly decrease is acceptable in most of applications.


Metallic nano-structures for polarization-independent multi-spectral filters.

Tang Y, Vlahovic B, Brady DJ - Nanoscale Res Lett (2011)

The transmission spectrum of a CSHA. (L = 330 nm, W = 10 nm, h = 250 nm, and D = 350 nm) with different incident angles of 0, 15, 30, and 60.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211488&req=5

Figure 6: The transmission spectrum of a CSHA. (L = 330 nm, W = 10 nm, h = 250 nm, and D = 350 nm) with different incident angles of 0, 15, 30, and 60.
Mentions: It is very important for the CSHAs to have a large incident angle acceptance in the application in the spectral filter field. We vary the incident angle of the plane wave from 0 to 60 in the simulations (L = 330 nm, W = 10 nm, D = 350 nm, and h = 250 nm), these results show that the transmission peaks will stay at the same wavelengths, but the magnitudes of the peaks will decrease slightly for larger angles (see Figure 6), and this slightly decrease is acceptable in most of applications.

Bottom Line: Cross-shaped-hole arrays (CSHAs) are selected for diminishing the polarization-dependent transmission differences of incident plane waves.We investigate the light transmission spectrum of the CSHAs in a thin gold film over a wide range of features.It implicates the possibility to obtain a desired polarization-independent transmission spectrum from the CSHAs by designing their parameters.

View Article: PubMed Central - HTML - PubMed

Affiliation: The Department of Physics, North Carolina Central University, Durham, NC, 27707, USA. tangy@nccu.edu.

ABSTRACT
Cross-shaped-hole arrays (CSHAs) are selected for diminishing the polarization-dependent transmission differences of incident plane waves. We investigate the light transmission spectrum of the CSHAs in a thin gold film over a wide range of features. It is observed that two well-separated and high transmission efficiency peaks could be obtained by designing the parameters in the CSHAs for both p-polarized and s-polarized waves; and a nice transmission band-pass is also observed by specific parameters of a CSHA too. It implicates the possibility to obtain a desired polarization-independent transmission spectrum from the CSHAs by designing their parameters. These findings provide potential applications of the metallic nano-structures in optical filters, optical band-pass, optical imaging, optical sensing, and biosensors.

No MeSH data available.


Related in: MedlinePlus