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An Analog of electrically induced transparency via surface delocalized modes.

Xiao X, Zhou B, Wang X, He J, Hou B, Zhang Y, Wen W - Sci Rep (2015)

Bottom Line: We demonstrate theoretically and experimentally an interesting opaque state, which is based on an analog of electromagnetically induced transparency (EIT) in mechanism, in a metal hole array of the dimer lattice.By introducing a small difference to the dimer holes of each unit cell, the surface delocalized modes launching out from the dimer holes can have destructive interferences.This surface-mode-induced opacity (SMIO) state is very sensitive to the difference of the dimer holes, which will promise various applications.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.

ABSTRACT
We demonstrate theoretically and experimentally an interesting opaque state, which is based on an analog of electromagnetically induced transparency (EIT) in mechanism, in a metal hole array of the dimer lattice. By introducing a small difference to the dimer holes of each unit cell, the surface delocalized modes launching out from the dimer holes can have destructive interferences. Consequently, a narrow opaque window in the transparent background can be observed in the transmission spectrum. This surface-mode-induced opacity (SMIO) state is very sensitive to the difference of the dimer holes, which will promise various applications.

No MeSH data available.


Related in: MedlinePlus

The schematic configurations of the unit cells of two samples: (a) the two dimer holes have no difference; (b) the two dimer holes have a small difference in their long sides. (c) the real image of the two samples: the left one is the sample 1 and the right one is sample 2. The transmission spectra of the two samples: (d) shows the measured results; (e) shows the calculated results. In (d) and (e), the red arrows indicate the positions of the SMIO states.
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f5: The schematic configurations of the unit cells of two samples: (a) the two dimer holes have no difference; (b) the two dimer holes have a small difference in their long sides. (c) the real image of the two samples: the left one is the sample 1 and the right one is sample 2. The transmission spectra of the two samples: (d) shows the measured results; (e) shows the calculated results. In (d) and (e), the red arrows indicate the positions of the SMIO states.

Mentions: To verify the SMIO state, we fabricate MHA of dimer lattice and measure the transmission spectrum in sub-THz regime. In our samples, the difference between the dimer hole is achieved by shortening the longer sides of one of the dimer holes. The detailed configuration of our sample are shown in Fig. 5(b). As a comparison, we also fabricate a MHA of the identical dimer holes (see Fig. 5(a)). The real images of the two samples are shown in Fig. 5(c). Because MHA is fabricated on a quartz substrate, the wood’s anomaly frequency is given by  ∼ 0.5 THz. Indeed, for both samples, we observe transmission dips around 0.5 THz. The SMIO state is observed at around 0.47 THz. For the comparison, the calculated transmission spectra are shown in Fig. 5(e) and agree with the experiment data.


An Analog of electrically induced transparency via surface delocalized modes.

Xiao X, Zhou B, Wang X, He J, Hou B, Zhang Y, Wen W - Sci Rep (2015)

The schematic configurations of the unit cells of two samples: (a) the two dimer holes have no difference; (b) the two dimer holes have a small difference in their long sides. (c) the real image of the two samples: the left one is the sample 1 and the right one is sample 2. The transmission spectra of the two samples: (d) shows the measured results; (e) shows the calculated results. In (d) and (e), the red arrows indicate the positions of the SMIO states.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4508561&req=5

f5: The schematic configurations of the unit cells of two samples: (a) the two dimer holes have no difference; (b) the two dimer holes have a small difference in their long sides. (c) the real image of the two samples: the left one is the sample 1 and the right one is sample 2. The transmission spectra of the two samples: (d) shows the measured results; (e) shows the calculated results. In (d) and (e), the red arrows indicate the positions of the SMIO states.
Mentions: To verify the SMIO state, we fabricate MHA of dimer lattice and measure the transmission spectrum in sub-THz regime. In our samples, the difference between the dimer hole is achieved by shortening the longer sides of one of the dimer holes. The detailed configuration of our sample are shown in Fig. 5(b). As a comparison, we also fabricate a MHA of the identical dimer holes (see Fig. 5(a)). The real images of the two samples are shown in Fig. 5(c). Because MHA is fabricated on a quartz substrate, the wood’s anomaly frequency is given by  ∼ 0.5 THz. Indeed, for both samples, we observe transmission dips around 0.5 THz. The SMIO state is observed at around 0.47 THz. For the comparison, the calculated transmission spectra are shown in Fig. 5(e) and agree with the experiment data.

Bottom Line: We demonstrate theoretically and experimentally an interesting opaque state, which is based on an analog of electromagnetically induced transparency (EIT) in mechanism, in a metal hole array of the dimer lattice.By introducing a small difference to the dimer holes of each unit cell, the surface delocalized modes launching out from the dimer holes can have destructive interferences.This surface-mode-induced opacity (SMIO) state is very sensitive to the difference of the dimer holes, which will promise various applications.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.

ABSTRACT
We demonstrate theoretically and experimentally an interesting opaque state, which is based on an analog of electromagnetically induced transparency (EIT) in mechanism, in a metal hole array of the dimer lattice. By introducing a small difference to the dimer holes of each unit cell, the surface delocalized modes launching out from the dimer holes can have destructive interferences. Consequently, a narrow opaque window in the transparent background can be observed in the transmission spectrum. This surface-mode-induced opacity (SMIO) state is very sensitive to the difference of the dimer holes, which will promise various applications.

No MeSH data available.


Related in: MedlinePlus