Integrated optical bimodal waveguide biosensors: Principles and applications

Torrijos‐Morán, Luis; Lisboa, Bárbara D.; Soler, María; Lechuga, Laura M.; García-Rupérez, Jaime

doi:10.1016/j.rio.2022.100285

Cited by 26 publications

(14 citation statements)

References 104 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The setup system has been developed withing the context of a R&D project whose acronymous is PhotoAKI, so the system itself has been denominated as "PhotoAKI-Setup". Such a sensing operation can be operated by exploiting different physical principles, like the evanescent field sensing principle [ 6 ] or the light induced plasmonic resonance and its surface propagation [ 7 ]. While end-fire optical coupling to the input waveguide is theoretically possible [ 8 ], when the size of the waveguide section is reduced to small values less than 1m 2 , the optical coupling should necessarily rely on a grating structure [ 9 ].…”

Section: General Descriptionmentioning

confidence: 99%

Optomechanical system for photonic chip characterization

Fantoni¹,

Fernandes²,

Fidalgo³

et al. 2023

Photonic Instrumentation Engineering X

View full text Add to dashboard Cite

It is presented in this work a description of an optomechanical setup to be used for the characterization of planar photonic chips. The system allows the fine tuning of an optical fiber position on an input grating, controlling its XYZ position and its angle of incidence. A similar configuration is used for the output extraction, while a fiber array can be used an alternative to monitor multiple output channels. Such a configuration can be useful for characterization of arrayed sensing devices or Optical Phased Arrays. The system can be used in the visible range and in the IR spectrum as well, provided the input light source is changed. All the setting are controlled manually, and it is prepared to easily perform a sequential analysis of a set of identical circuits, fabricated in a parallel configuration on the same chip. As most of the components are individually and commercially available thought the Thorlabs website, the set up can be easily replicated, so all the system designs are made available in Open Access modality in SolidWorks format. Examples of characterization process and the obtained results are reported to demonstrate the use of the system and to support a tolerance analysis.

show abstract

Section: General Descriptionmentioning

confidence: 99%

Optomechanical system for photonic chip characterization

Fantoni¹,

Fernandes²,

Fidalgo³

et al. 2023

Photonic Instrumentation Engineering X

View full text Add to dashboard Cite

show abstract

“…Photonic devices and circuits find applications in various fields of science, including communications [1], quantum computing [2], neural networks [3], [4] and sensing, including: biosensors [5]- [7], temperature sensors [8] and gas detectors [9]. Amorphous silicon in its hydrogenated form (a-Si:H) and hydrogenated amorphous silicon nitride (a-SiN:H) are suitable materials for photonic components, the former is usually preferred for applications in the near infrared (NIR) [10] and the latter is used in near infrared [11] and visible light [12]- [14].…”

Section: Introductionmentioning

confidence: 99%

Amorphous silicon grating couplers based on random and quadratic variation of the refractive index

Almeida,

Rossi,

Lourenço

et al. 2024

Physics and Simulation of Optoelectronic Devices XXXII

View full text Add to dashboard Cite

An increasing number of integrated photonic solutions find applications in the fields of biomedicine, manufacture, quantum computation and telecommunications. Size mismatch between optical fibers, light sources, photodetectors and photonic waveguides is usually significant, typically with the former having cross-sections on the orders of hundreds of micrometers or more and the latter a few micrometers or hundreds of nanometers. Efficiency in coupling light to and from photonic integrated circuits is an extremely important parameter since it influences device's performance, affecting signal-to-noise ratio. Several approaches exist for light coupling, such as off-plane coupling with the assistance of grating couplers, onplane/edge coupling with or without the assistance of tapers and adiabatic coupling. In this study we focus on grating couplers designed in amorphous silicon-on-insulator (SOI) platforms. Grating couplers are compact, can be tested at waferlevel, and do not require application specific fiber terminations, such as lenses and/or tapers. Two approaches in the optimization of grating couplers were explored, one based on a lithographic mask defined by the superposition of two different grating patterns, with different periods, having an offset to provide a random distribution of grating elements, and a technique based on the quadratic variation of the refractive index of the grating structure along its length. Results were obtained from 2D-FDTD simulations. Coupling efficiencies for the quasi-TE mode over -13 dB and -3 dB were obtained for the random and quadratic variations of the effective refractive index at a wavelength of 1550 nm, without bottom reflectors.

show abstract

“…Bimodal waveguide interferometers (BiMW) are especially appealing, since they reduce the relatively large footprint of a Mach-Zehnder-interferometer (MZI). 2 The common design approach is to maximize the sensitivity, while neglecting the impact of optical loss. Since optical loss decreases the available intensity of the electromagnetic field, however, a disadvantageous design will deteriorate either the Q-factor, or the interferometric visibility, and by extension the limit-of-detection (LOD).…”

Section: Introductionmentioning

confidence: 99%

Loss-engineering of a bimodal waveguide interferometer: an optimized silicon nitride platform for chemical and biological sensing

Hörmann,

Hinum-Wagner,

Bergmann

2023

Optical Modeling and Performance Predictions XIII

View full text Add to dashboard Cite

Integrated photonic sensors are promising devices to detect the presence of biological and chemical substances. Especially, silicon photonics features scalable, compact, and robust applications in, inter alia, the medical, pharmaceutical, and chemical industries for decentralized, real-time sensing. In an effort to continuously lower the limit of detection and build ultra precise devices, their sensitivity is steadily increased. The optical loss, however, is often neglected. This reduces the available intensity in the transmission spectrum and, thus, restricts the achievable limit of detection. We optimize a bimodal waveguide interferometer for environmental sensing based on a silicon nitride platform. Thereby, we combine considerations regarding the sensitivity, optical loss, and coupling into a figure of merit to design the single-mode and the bimodal platforms. To that end, we utilize a recently developed model of surface-roughness-induced scattering to include the estimated propagation loss in the design process. This model uses the simulated modes and measured autocovariance in the surface roughness for an estimation of the propagation loss in the real platform. We observe that considering the optical loss favors platforms of medium height for a quasi-transverse-electric polarization. In consequence, we demonstrate drastic changes in the design choices compared to pure sensitivity-focused waveguide platforms. Thus, we show that a holistic design process is essential to fully utilize the potential of integrated photonic devices. Ultimately, we are convinced that this methodology will be beneficial in making integrated photonic sensors more sensitive.

show abstract

Integrated optical bimodal waveguide biosensors: Principles and applications

Cited by 26 publications

References 104 publications

Optomechanical system for photonic chip characterization

Optomechanical system for photonic chip characterization

Amorphous silicon grating couplers based on random and quadratic variation of the refractive index

Loss-engineering of a bimodal waveguide interferometer: an optimized silicon nitride platform for chemical and biological sensing

Contact Info

Product

Resources

About