Limits...
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 distribution of the tangential electric field in a unit cell for different cases: (a) at the first transmission peak of the black solid curve in Fig. 1(a); (b) at the second transmission peak of the black solid curve in Fig. 1(a); (c) at transmission dip of the black solid curve (the SMIO state) in Fig. 1(a); (d) at the transmission peak of the blue dash curve in Fig. 1(a). By comparing (c) and (d), it can be seen that the opposite phase in (c) is crucial for the occurrence of the SMIO state.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4508561&req=5

f2: The distribution of the tangential electric field in a unit cell for different cases: (a) at the first transmission peak of the black solid curve in Fig. 1(a); (b) at the second transmission peak of the black solid curve in Fig. 1(a); (c) at transmission dip of the black solid curve (the SMIO state) in Fig. 1(a); (d) at the transmission peak of the blue dash curve in Fig. 1(a). By comparing (c) and (d), it can be seen that the opposite phase in (c) is crucial for the occurrence of the SMIO state.

Mentions: To confirm the above understanding, we calculate the tangential electric field (parallel to the metal surface) on the metal surface at the two transmission peaks and the opaque state. As one expected, at the lower transmission peak great field enhancement is observed around the ε1 = 1.21 holes (Fig. 2(a)), while the field enhancement is found around the ε2 = 1 holes at the higher transmission peak (Fig. 2(b)). At the opaque state, we find that both the dimer holes are at resonant (Fig. 2(c)). For a comparison, we also calculate the tangential electric field on the metal surface at the transmission peak of a MHA of identical dimer holes (ε1 = ε2 = 1) and show it in Fig. 2(d). By comparing Fig. 2 (c),(d), we find that the opposite phases at the two holes are crucial for the formation of the opaque state. To further explore the properties at the opaque state, we calculate the z-component (perpendicular to the metal surface) electric field on the metal surface. From the distribution of the z-component electric field in Fig. 3, we observe a clear interference pattern of the delocalized surface modes launched from the neighbored holes. These results clearly indicate that the opaque state is caused by the destructive interference of the delocalized surface modes.


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 distribution of the tangential electric field in a unit cell for different cases: (a) at the first transmission peak of the black solid curve in Fig. 1(a); (b) at the second transmission peak of the black solid curve in Fig. 1(a); (c) at transmission dip of the black solid curve (the SMIO state) in Fig. 1(a); (d) at the transmission peak of the blue dash curve in Fig. 1(a). By comparing (c) and (d), it can be seen that the opposite phase in (c) is crucial for the occurrence of the SMIO state.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f2: The distribution of the tangential electric field in a unit cell for different cases: (a) at the first transmission peak of the black solid curve in Fig. 1(a); (b) at the second transmission peak of the black solid curve in Fig. 1(a); (c) at transmission dip of the black solid curve (the SMIO state) in Fig. 1(a); (d) at the transmission peak of the blue dash curve in Fig. 1(a). By comparing (c) and (d), it can be seen that the opposite phase in (c) is crucial for the occurrence of the SMIO state.
Mentions: To confirm the above understanding, we calculate the tangential electric field (parallel to the metal surface) on the metal surface at the two transmission peaks and the opaque state. As one expected, at the lower transmission peak great field enhancement is observed around the ε1 = 1.21 holes (Fig. 2(a)), while the field enhancement is found around the ε2 = 1 holes at the higher transmission peak (Fig. 2(b)). At the opaque state, we find that both the dimer holes are at resonant (Fig. 2(c)). For a comparison, we also calculate the tangential electric field on the metal surface at the transmission peak of a MHA of identical dimer holes (ε1 = ε2 = 1) and show it in Fig. 2(d). By comparing Fig. 2 (c),(d), we find that the opposite phases at the two holes are crucial for the formation of the opaque state. To further explore the properties at the opaque state, we calculate the z-component (perpendicular to the metal surface) electric field on the metal surface. From the distribution of the z-component electric field in Fig. 3, we observe a clear interference pattern of the delocalized surface modes launched from the neighbored holes. These results clearly indicate that the opaque state is caused by the destructive interference of the delocalized surface modes.

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