The spontaneous emission performance of a quantum emitter coupled to a hybrid plasmonic waveguide with specified output polarization for on-chip plasmonic single-photon source

Khaleel, Farooq Abdulghafoor; Tawfeeq, Shelan K.

doi:10.1016/j.photonics.2021.100925

“…Besides, the mesh settings are set as a Physicscontrolled mesh with an extremely fine resolution for accurate calculation of the propagated and scattered fields. The initial etch depth is selected to be half the channel width of the 150 nm GaP photonic waveguide described in [23]. Firstly, the effective index calculation is based on the slab waveguide approximation.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…This λ is widely used as a general emission λ for the QEs embedded inside a DLSPP or HPW waveguides [3,16]. Besides, an HSQ layer with an optimum thickness of 20 nm is deposited above the first GC layer to act as a separator between the two GCs layers [23]. The refractive indices at 700 nm for both GaP and HSQ are 3.2543 and 1.41, respectively.…”

Section: Figure 1: the Proposed Double-layer Gcmentioning

confidence: 99%

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Design and Numerical Verification of Four States Polarization-independent Grating Coupler Using a Double-Layer Approach for a Single-photon Source based on HPW

Khaleel¹,

Tawfeeq

²

2021

Preprint

0

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In this paper, a double-layer approach is proposed to design a compact four states polarization-independent grating coupler (GC). The proposed polarization-independent GC is designed to couple a 700 nm polarized light propagated in a 150 nm Gallium Phosphide (GaP) waveguide to a polarization-maintaining fiber (PMF). The double-layer approach is based on the deposition of GaP gratings designed to couple the transverse magnetic (TM) light over the GaP gratings designed to couple the transverse electric (TE) light. The two layers are separated by a Hydrogen silsesquioxane (HSQ) with an optimum thickness of 20 nm. The proposed method resulted in relatively high coupling efficiencies (CEs) of 39.2%, 31.1%, and 23.3% for the TE, TM, and 45º/-45º linearly polarized light, respectively. The polarization-dependent loss (PDL) is 1 dB, 1.26 dB, and 2.26 dB corresponds to TE-TM, TM-45º/-45º, and TE-45º/-45º, respectively. The performance of the double-layer approach is numerically verified by the two-dimensional (2D) finite element algorithm (FEM) using COMSOL software. The proposed method suggests a novel and simple approach to design a compact four states polarization-independent GC that could be used in integrated (on-chip) photonic communication circuits.

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“…This λ is widely used as a general emission λ for the QEs embedded inside a DLSPP or HPW waveguides [3,15]. Besides, an HSQ layer with an optimum thickness of 20 nm is deposited above the first GC layer to act as a separator between the two GCs layers [22]. The refractive indices at 700 nm for both GaP and HSQ are 3.2543 and 1.41, respectively.…”

Section: Figure 1: the Proposed Double-layer Gcmentioning

confidence: 99%

“…A user-defined port at the right side injects the light into the GaP photonic waveguide with different polarization configurations. The user-defined port mimics the QE's emission with different polarization propagated in the HPWs investigated in [22].…”

Section: Figure 1: the Proposed Double-layer Gcmentioning

confidence: 99%

Design And Numerical Verification of Four States Polarization-Independent Grating Coupler Using A Double-Layer Approach For A Single-Photon Source Based On HPW

Khaleel

¹

,

Tawfeeq

²

2021

Preprint

0

View full text Add to dashboard Cite

In this paper, a double-layer approach is proposed to design a compact four states polarization-independent grating coupler (GC). The proposed polarization-independent GC is designed to couple a 700 nm polarized light propagated in a 150 nm Gallium Phosphide (GaP) waveguide to a polarization-maintaining fiber (PMF). The double-layer approach is based on the deposition of GaP gratings designed to couple the transverse magnetic (TM) light over the GaP gratings designed to couple the transverse electric (TE) light. The two layers are separated by a Hydrogen silsesquioxane (HSQ) with an optimum thickness of 20 nm. The proposed method resulted in relatively high coupling efficiencies (CEs) of 39.2%, 31.1%, and 23.3% for the TE, TM, and 45º/-45º linearly polarized light, respectively. The polarization-dependent loss (PDL) is 1 dB, 1.26 dB, and 2.26 dB corresponds to TE-TM, TM-45º/-45º, and TE-45º/-45º, respectively. The performance of the double-layer approach is numerically verified by the two-dimensional (2D) finite element algorithm (FEM) using COMSOL software. The proposed method suggests a novel and simple approach to design a compact four states polarization-independent GC that could be used in integrated (on-chip) photonic communication circuits.

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The modeling techniques of the second‐order correlation function g⁽²⁾(τ) for a quantum emitter

Khaleel

¹

,

Tawfeeq

²

2022

Int J Numerical Modelling

0

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The numerical techniques required to prove the single‐photon emission from any type of quantum emitter (QE) after being coupled to any nanostructure are presented in this paper. The Purcell effect modifies the emission characteristics of QEs, such as color centers in nanodiamonds, for example, nitrogen‐vacancy (NV) centers, silicon vacancy (SiV) centers, and so forth, or semiconductor quantum dots. Our numerical approach is based on the unique QEs' experimental photophysics parameters and numerical analysis software, which are MATLAB and Quantum Toolbox in Python (QuTiP). Our results show a comparable g(2) (τ) behavior between our proposed numerical model and the other two experimental results for the QE before and after coupling to a plasmonic waveguide with subwavelength dimensions. Our proposed method is essential to prove the single‐photon emission of modeled single‐photon source (SPS) in an on‐chip polarization‐dependent quantum key distribution system (QKD).

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The spontaneous emission performance of a quantum emitter coupled to a hybrid plasmonic waveguide with specified output polarization for on-chip plasmonic single-photon source

Cited by 6 publications

References 39 publications

Design and Numerical Verification of Four States Polarization-independent Grating Coupler Using a Double-Layer Approach for a Single-photon Source based on HPW

Design and Numerical Verification of Four States Polarization-independent Grating Coupler Using a Double-Layer Approach for a Single-photon Source based on HPW

Design And Numerical Verification of Four States Polarization-Independent Grating Coupler Using A Double-Layer Approach For A Single-Photon Source Based On HPW

The modeling techniques of the second‐order correlation function g⁽²⁾(τ) for a quantum emitter

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The spontaneous emission performance of a quantum emitter coupled to a hybrid plasmonic waveguide with specified output polarization for on-chip plasmonic single-photon source

Cited by 6 publications

References 39 publications

Design and Numerical Verification of Four States Polarization-independent Grating Coupler Using a Double-Layer Approach for a Single-photon Source based on HPW

Design and Numerical Verification of Four States Polarization-independent Grating Coupler Using a Double-Layer Approach for a Single-photon Source based on HPW

Design And Numerical Verification of Four States Polarization-Independent Grating Coupler Using A Double-Layer Approach For A Single-Photon Source Based On HPW

The modeling techniques of the second‐order correlation function g(2)(τ) for a quantum emitter

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The modeling techniques of the second‐order correlation function g⁽²⁾(τ) for a quantum emitter