Correlation of Scattering Loss, Sidewall Roughness and Waveguide Width in Silicon-on-Insulator (SOI) Ridge Waveguides

Yap, K.P.; Delâge, A.; Lapointe, J.; Lamontagne, B.; Schmid, Jens H.; Waldron, P.; Syrett, Barry; Janz, Siegfried

doi:10.1109/jlt.2009.2021562

Cited by 85 publications

(31 citation statements)

References 13 publications

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“…However, the contribution to the radiative loss generated by the roughness of the top/bottom surfaces is typically negligible compared to the sidewall roughness, and the 3D model (6) simply reduces to equation (5) (A = 0). This result is well in accordance with those reported by Yap et al in [11]. As for the slab waveguide, for 3D laterally confined waveguides the parameters A and A can also be considered independent of w and h. Equation (5) hence provides a simple and accurate fitting rule for both fundamental and higher order modes of 2D and 3D waveguides.…”

Section: Radiation Loss Modelsupporting

confidence: 90%

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A unified approach for radiative losses and backscattering in optical waveguides

Melati

Morichetti

Melloni

2014

J. Opt.

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Sidewall roughness in optical waveguides represents a severe impairment for the proper functionality of photonic integrated circuits. The interaction between the propagating mode and the roughness is responsible for both radiative losses and distributed backscattering. In this paper, a unified vision on these extrinsic loss phenomena is discussed, highlighting the fundamental role played by the sensitivity of the effective index neff of the optical mode to waveguide width variations. The nw model presented applies to both 2D slab waveguides and 3D laterally confined waveguides and is in very good agreement with existing models that individually describe radiative loss or backscattering only. Experimental results are presented, demonstrating the validity of the nw model for arbitrary waveguide geometries and technologies. This approach enables an accurate description of realistic optical waveguides and provides simple design rules for optimization of the waveguide geometry in order to reduce the propagation losses generated by sidewall roughness.

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Section: Radiation Loss Modelsupporting

confidence: 90%

“…Even though the Payne-Lacey model was originally developed only for 2D slab waveguides, it has been applied also to 3D structures through the effective index method [8,9,11]. Good agreement between the numerical model and the experimental results was observed also in these cases.…”

Section: Radiation Loss Modelmentioning

confidence: 95%

A unified approach for radiative losses and backscattering in optical waveguides

Melati

Morichetti

Melloni

2014

J. Opt.

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show abstract

“…1, the measured loss is likely due to scattering at the surface due to roughness. Such scattering loss can be quantitatively estimated by using the Payne–Laycey model [31–32]. The scattering loss α (in units of dB/unit length) scales quadratically with the surface roughness σ as…”

Section: Resultsmentioning

confidence: 99%

Grating-assisted coupling to nanophotonic circuits in microcrystalline diamond thin films

Rath¹,

Khasminskaya²,

Nebel³

et al. 2013

Beilstein J. Nanotechnol.

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SummarySynthetic diamond films can be prepared on a waferscale by using chemical vapour deposition (CVD) on suitable substrates such as silicon or silicon dioxide. While such films find a wealth of applications in thermal management, in X-ray and terahertz window design, and in gyrotron tubes and microwave transmission lines, their use for nanoscale optical components remains largely unexplored. Here we demonstrate that CVD diamond provides a high-quality template for realizing nanophotonic integrated optical circuits. Using efficient grating coupling devices prepared from partially etched diamond thin films, we investigate millimetre-sized optical circuits and achieve single-mode waveguiding at telecoms wavelengths. Our results pave the way towards broadband optical applications for sensing in harsh environments and visible photonic devices.

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“…The first design is simpler and more straightforward to combine with other on-chip SM functionalities, such as beam splitters or interferometers. However, small width WGs tend to have larger propagation losses since a less tightly confined mode is more susceptible to scattering due to sidewalls roughness . Indeed, in the case of the considered system we observe propagation losses on the level of 2–3.5 dB/mm for 2.0 μm width WGs and 4–7 dB/mm in the case of 0.8 μm WGs.…”

mentioning

confidence: 74%

Purcell-Enhanced and Indistinguishable Single-Photon Generation from Quantum Dots Coupled to On-Chip Integrated Ring Resonators

et al. 2020

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Integrated photonic circuits provide a versatile toolbox of functionalities for advanced quantum optics applications. Here, we demonstrate an essential component of such a system in the form of a Purcell enhanced single-photon source based on a quantum dot coupled to a robust on-chip integrated resonator. For that, we develop GaAs monolithic ring cavities based on distributed Bragg reflector ridge waveguides.Under resonant excitation conditions, we observe an over twofold spontaneous emission rate enhancement using Purcell effect and gain a full coherent optical control of a QDtwo-level system via Rabi oscillations. Furthermore, we demonstrate an on-demand 1 single-photon generation with strongly suppressed multi-photon emission probability as low as 1% and two-photon interference with visibility up to 95%. This integrated single-photon source can be readily scaled up, promising a realistic pathway for scalable on-chip linear optical quantum simulation, quantum computation and quantum networks.

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Correlation of Scattering Loss, Sidewall Roughness and Waveguide Width in Silicon-on-Insulator (SOI) Ridge Waveguides

Cited by 85 publications

References 13 publications

A unified approach for radiative losses and backscattering in optical waveguides

A unified approach for radiative losses and backscattering in optical waveguides

Grating-assisted coupling to nanophotonic circuits in microcrystalline diamond thin films

Purcell-Enhanced and Indistinguishable Single-Photon Generation from Quantum Dots Coupled to On-Chip Integrated Ring Resonators

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