Reconfigurable label-free shape-sieving of submicron particles in paired chalcogenide waveguides

Cao, Tun; Wang, Zhongming; Mao, Libang

doi:10.1039/d1nr05798g

Cited by 6 publications

(2 citation statements)

References 63 publications

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“…More importantly, their susceptibility to electromagnetic interference as well as their limited range makes their use in carbon fibre composite tools prohibitive [ 4 ]. Photonic structures have a strong track record in sensing applications [ 5 , 6 , 7 , 8 ], and there are configurations of sensing optical fibres deployed in composite parts for structural health monitoring [ 9 , 10 , 11 ]. However, these sensors are often embedded at a certain depth in the tool or the produced part, thus prohibiting monitoring at the interface between the tool and the resin.…”

Section: Introductionmentioning

confidence: 99%

Photonic Integrated Circuit Based Temperature Sensor for Out-of-Autoclave Composite Parts Production Monitoring

Syriopoulos,

Poulopoulos,

Zervos

et al. 2023

Sensors

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The use of composite materials has seen widespread adoption in modern aerospace industry. This has been facilitated due to their favourable mechanical characteristics, namely, low weight and high stiffness and strength. For broader implementation of those materials though, the out-of-autoclave production processes have to be optimized, to allow for higher reliability of the parts produced as well as cost reduction and improved production speed. This optimization can be achieved by monitoring and controlling resin filling and curing cycles. Photonic Integrated Circuits (PICs), and, in particular, Silicon Photonics, owing to their fast response, small size, ability to operate at higher temperatures, immunity to electromagnetic interference, and compatibility with CMOS fabrication techniques, can offer sensing solutions fulfilling the requirements for composite material production using carbon fibres. In this paper, we demonstrate a passive optical temperature sensor, based on a 220 nm height Silicon-on-Insulator platform, embedded in a composite tool used for producing RTM-6 composite parts of high quality (for use in the aerospace industry). The design methodology of the photonic circuit as well as the experimental results and comparison with the industry standard thermocouples during a thermal cycling of the tool are presented. The optical sensor exhibits high sensitivity (85 pm/°C), high linearity (R2 = 0.944), and is compatible with the RTM-6 production process, operating up to 180 °C.

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Section: Introductionmentioning

confidence: 99%

Photonic Integrated Circuit Based Temperature Sensor for Out-of-Autoclave Composite Parts Production Monitoring

Syriopoulos,

Poulopoulos,

Zervos

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…Although the optical trapping force can be enhanced to manipulate smaller particles by simply increasing the laser power, this improvement is very limited and brings about irreversible photothermal damage [ 9 ]. Stable manipulation of nanoparticles can be achieved by increasing the “sharpness” of the optical intensity gradient [ 10 , 11 ] or through local amplification of the optical field [ 12 , 13 ]. Over the past few decades, in order to break the diffraction limit of the COTs, many nanotweezers based on near-field optics have been proposed, including slot waveguide [ 10 , 14 ], photonic crystal [ 15 , 16 ], plasmonic [ 17 , 18 , 19 ], optical fiber [ 20 , 21 , 22 , 23 ] and other [ 24 , 25 , 26 ] nanotweezers.…”

Section: Introductionmentioning

confidence: 99%

Accumulation, Directional Delivery and Release of Nanoparticles along a Nanofiber

Wen¹,

Yao²,

Yuan³

et al. 2022

Molecules

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Controllably accumulating and delivering nanoparticles (NPs) into specific locations are a central theme of nano-engineering and important for targeted therapy or bacteria removal. Here we present a technique allowing bidirectional accumulation, directional delivery and release of nanoparticles through two 980-nm-wavelength counter-propagating evanescent waves in an optical nanofiber (NF). Using 713-nm-diameter polystyrene NPs suspension and an 890-nm-diameter NF as an example, we experimentally and theoretically demonstrate that the NPs delivered along the NF surface in opposite directions are accumulated into the region where the scattering loss of the NPs is maximum, and about 90% of the incident optical field from both ends of the NF can be coupled into the region. Moreover, the accumulation region can be controlled by altering the incident optical power ratio of the two counter-propagating laser beams, while the accumulated NPs can be delivered and then released into the specific locations by turning off the two lasers.

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Flexible transmission control of mode conversion in a TiO2 cladding silicon subwavelength waveguide by engineering inter-waveguide mode coupling

Chen

Sun

Wang

et al. 2023

Optics & Laser Technology

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Reconfigurable label-free shape-sieving of submicron particles in paired chalcogenide waveguides

Abstract: Up-to-date particle sieving schemes face formidable challenges for sieving label-free submicron molecules with similar size and dielectric constant but diverse shapes. Herein, optical sorting of polystyrene particles with the various...

Cited by 6 publications

References 63 publications

Photonic Integrated Circuit Based Temperature Sensor for Out-of-Autoclave Composite Parts Production Monitoring

Photonic Integrated Circuit Based Temperature Sensor for Out-of-Autoclave Composite Parts Production Monitoring

Accumulation, Directional Delivery and Release of Nanoparticles along a Nanofiber

Flexible transmission control of mode conversion in a TiO2 cladding silicon subwavelength waveguide by engineering inter-waveguide mode coupling

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