Liquid refractive index sensor based on a 2D 10-fold photonic quasicrystal

Wang, Shuai; Sun, Xin; Wang, Cong; Peng, Gang-Ding; Qi, Yongle; Wang, Xishi

doi:10.1088/1361-6463/aa7c56

Cited by 16 publications

(9 citation statements)

References 17 publications

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“…The reason is, as mentioned above, close light spots in the latter generate interference so as to destroy self-similarity to some extent. The results also explain to some extent why these PQCs are widely studied and even utilized for devices [94][95][96][97][98][99][100][101][102][103][104][105]. Fig.28 The maximum gap-midgap ratios Δω/ω c of different quasicrystals.…”

Section: Band-gap Of Multi-fold Complex Pqcs[107]mentioning

confidence: 74%

“…Compared to periodic photonic crystals (PCs), PQCs have the following advantages: the low dielectric constant contrast when a complete PBG appears [94][95][96], higher isotropy of PBG [96][97][98]and rich defect modes without introducing defect [99] etc. PQCs have been utilized to design waveguides [97,100], sensors [101], laser microcavities [102], filters [95,103], owing to the band-gap and localized state properties, showing great potential for small size, flexibility and effectiveness, thereby lays the foundation for the development of optical integratedcircuits.…”

Section: On Pbgmentioning

confidence: 99%

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Generalized Dynamics of Soft-Matter Quasicrystals

Tang¹

2017

Springer Series in Materials Science

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This article provides a detailed review on the generalized dynamics of soft-matter quasicrystals developed recent years. Comparing to solid quasicrystals consisted mainly with metallic alloys, soft-matter quasicrystals have been observed in liquid crystals, polymers, colloids, nanoparticles and surfactants, which indicates quite different formation mechanism. Based onLandau-Anderson theory and group representation theory, we have studied the symmetry, symmetry breaking and elementary excitations for the observed and possible soft-matter quasicrystals. We further proposed one more elementary excitation -fluid phonon additional to the phonon and phason for solid quasicrystals, to quantitatively describe the dynamics of soft-matter quasicrystals. The general governing equations and the solutions of the dynamics evolution on the distribution, deformation and motion of the new phase are studied, which reveal quite distinguishing dynamic behaviour with those of conventional fluids and solid quasicrystals. Someapplications are introduced, which show this is an important field of new materials and materials science. 9

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Section: Band-gap Of Multi-fold Complex Pqcs[107]mentioning

confidence: 74%

Section: On Pbgmentioning

confidence: 99%

Generalized Dynamics of Soft-Matter Quasicrystals

Tang¹

2017

Springer Series in Materials Science

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“…With this design, they obtained a minimum detectable RI step of the order of 10 −6 RIU. Wang et al, in [ 22 ], proposed a RI sensor based on a 2D photonic quasicrystal structure composed of silicon rods, obtaining a sensing accuracy of 10 −4 RIU. 3D structures have been as well extensively investigated: Wu et al, for example, developed a 3D polymeric photonic crystal RI sensor fabricated by femtosecond laser writing, and detected RI changes as low as 6 × 10 −3 RIU [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Spectral Optical Readout of Rectangular–Miniature Hollow Glass Tubing for Refractive Index Sensing

Rigamonti

Bello

Merlo

2018

Sensors

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For answering the growing demand of innovative micro-fluidic devices able to measure the refractive index of samples in extremely low volumes, this paper presents an overview of the performances of a micro-opto-fluidic sensing platform that employs rectangular, miniature hollow glass tubings. The operating principle is described by showing the analytical model of the tubing, obtained as superposition of different optical cavities, and the optical readout method based on spectral reflectivity detection. We have analyzed, in particular, the theoretical and experimental optical features of rectangular tubings with asymmetrical geometry, thus with channel depth larger than the thickness of the glass walls, though all of them in the range of a few tens of micrometers. The origins of the complex line-shape of the spectral response in reflection, due to the different cavities formed by the tubing flat walls and channel, have been investigated using a Fourier transform analysis. The implemented instrumental configuration, based on standard telecom fiberoptic components and a semiconductor broadband optical source emitting in the near infrared wavelength region centered at 1.55 µm, has allowed acquisition of reflectivity spectra for experimental verification of the expected theoretical behavior. We have achieved detection of refractive index variations related to the change of concentration of glucose-water solutions flowing through the tubing by monitoring the spectral shift of the optical resonances.

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“…SPR [38] LSPR [34] Dielectric State-of-the-Art Dielectric Dielectric Photonic Crystal [39] Dielectric Nanostructures [16,40] Metasurface Presented in The detection limit for spectroscopic measurement is described by Equation 1. Given a spectrum analyzer resolution of 1 pm, and a metasurface sensitivity of 323 nm/RIU, a detection limit of should be achievable.…”

Section: Table 1 Comparison Of Refractive Index Sensor Technologies the Final Column Titled "Dielectricmentioning

confidence: 99%

“…SPR [38] LSPR [34] Dielectric Photonic Crystal [39] State-of-the-Art Dielectric Nanostructures [16,40] Dielectric field amplitude is shown, depicting an antisymmetric resonance. A linearly polarized plane wave is incident from the top at 4 incidence; nearly perfect reflectance is observed.…”

Section: Supporting Informationmentioning

confidence: 99%

Highly Sensitive, Affordable, and Adaptable Refractive Index Sensing with Silicon‐Based Dielectric Metasurfaces

Ollanik

Oguntoye

Hartfield

et al. 2018

Adv Materials Technologies

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A sensing platform is presented that uses dielectric Huygens source metasurfaces to measure refractive index changes in a microfluidic channel with experimentally measured sensitivity of 323 nm/RIU, FOM of 5.4, and a response of 8.2 (820%) change in transmittance per refractive index unit (T/RIU). Changes in the refractive index of liquids flown through the channel are measured by singlewavelength transmittance measurement, requiring only a simple light source and photodetector, significantly reducing device expense in comparison to state-of-the-art refractive index sensing technologies. A techno-economic analysis predicts a device costing ~$2,400 that is capable of detecting refractive index changes on the order of 2*10 -8 . The metasurfaces utilized are low profile, scalable, and use materials and fabrication processes compatible with CMOS and other technologies This article is protected by copyright. All rights reserved.2 making them suitable for device integration. The Huygens metasurface system, characterized by spectrally overlapping electric and magnetic dipole modes, offers a high degree of customizability.Interplay between the two resonances may be controlled via metasurface geometry, leading to tunability of device sensitivity and measurement range. Ultra-high sensitivity of 350 nm/RIU with FOM of 219, corresponding to single-wavelength sensitivity of 360 T/RIU, is demonstrated computationally through use of antisymmetric resonances of a Huygens metasurface illuminated at small incidence angles.

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Liquid refractive index sensor based on a 2D 10-fold photonic quasicrystal

Cited by 16 publications

References 17 publications

Generalized Dynamics of Soft-Matter Quasicrystals

Generalized Dynamics of Soft-Matter Quasicrystals

Spectral Optical Readout of Rectangular–Miniature Hollow Glass Tubing for Refractive Index Sensing

Highly Sensitive, Affordable, and Adaptable Refractive Index Sensing with Silicon‐Based Dielectric Metasurfaces

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