Complex Frequency Analysis of Coupled Plasmonic Systems

Kebo Zeng; Shuang Zhang

doi:10.3788/AOS240692

Journals >Acta Optica Sinica >Volume 44 >Issue 10 >Page 1026019 > Article

Acta Optica Sinica
Vol. 44, Issue 10, 1026019 (2024)

Complex Frequency Analysis of Coupled Plasmonic Systems

Kebo Zeng and Shuang Zhang^*

Author Affiliations

New Cornerstone Science Laboratory, Department of Physics, University of Hong Kong, Hong Kong 999077, China

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DOI: 10.3788/AOS240692 Cite this Article Set citation alerts

Kebo Zeng, Shuang Zhang. Complex Frequency Analysis of Coupled Plasmonic Systems[J]. Acta Optica Sinica, 2024, 44(10): 1026019 Copy Citation Text

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Schematic diagram and numerical simulation results of coupled plasmonic periodic structure. (a) Structural parameters; (b) transmission spectra of same polarization Tuu and orthogonal polarization Tuv under incident light with polarization angle θu; (c) transmission spectra of same polarization Tvv and orthogonal polarization Tvu under incident light with polarization angle θv; (d) transmission spectra of same polarization Tyy and orthogonal polarization Tyx under incident light with polarization angle θy

Fig. 1. Schematic diagram and numerical simulation results of coupled plasmonic periodic structure. (a) Structural parameters; (b) transmission spectra of same polarization

T_{u u}

and orthogonal polarization

T_{u v}

under incident light with polarization angle

θ_{u}

; (c) transmission spectra of same polarization

T_{v v}

and orthogonal polarization

T_{v u}

under incident light with polarization angle

θ_{v}

; (d) transmission spectra of same polarization

T_{y y}

and orthogonal polarization

T_{y x}

under incident light with polarization angle

θ_{y}

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Comparison of numerical simulation and theoretical fitting results of transmission coefficient. (a) Transmission amplitude tuu; (b) transmission amplitude tvv; (c) transmission phase arg tuu; (d) transmission phase arg tvv

Fig. 2. Comparison of numerical simulation and theoretical fitting results of transmission coefficient. (a) Transmission amplitude

|t_{u u}|

; (b) transmission amplitude

|t_{v v}|

; (c) transmission phase arg

t_{u u}

; (d) transmission phase arg

t_{v v}

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Fig. 3. Transmission spectra of real frequency and complex frequency excitation. (a)(b)

T_{y y}

and

T_{y x}

under different virtual gain factors

τ

conditions,

γ = γ_{u}

; (c)(d)

T_{y y}

and

T_{y x}

of real frequency excitation under different coupling intensity (different gap

d

) conditions; (e)(f)

T_{y y}

and

T_{y x}

of complex frequency excitation under different coupling intensity (different gap

d

) conditions,

τ = 1.4 γ_{u}

Kebo Zeng, Shuang Zhang. Complex Frequency Analysis of Coupled Plasmonic Systems[J]. Acta Optica Sinica, 2024, 44(10): 1026019

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