Achieving wide-range photonics applications based on a compact grating-assisted silicon micro-ring resonator

Yuan, Guohui; Cao, Siying; Zhang, Pengnian; Peng, Fangcao; Peng, Zhenming; Wang, Zhuoran

doi:10.1016/j.ijleo.2019.02.159

Cited by 9 publications

(3 citation statements)

References 38 publications

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“…As the grating structure delocalizes the propagating field of the ring into the analyte region, it enhances field-analyte interaction and, consequently, bulk RI sensitivity. The bulk RI sensitivity of our structure is more than four times greater than that reported by Yuan et al [28], where a similar grating array is used in the ring structure. Given a △λ min step size of 1 pm, the system limit of detection (LOD) of the proposed structure (= △λ min bulk−sens. )…”

Section: Bulk Ri Sensingmentioning

confidence: 47%

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Grating assisted temperature insensitive micro-ring resonator biosensor

Kumar Verma,

Kumari,

Mani Tripathi

2023

J. Opt.

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A grating-assisted temperature-insensitive micro-ring resonator bio-sensor is reported using finite-difference time domain simulation method. In addition to choosing a negative thermo-optic coefficient material water to nullify temperature-induced wavelength shift, optimization of the opto-geometric parameters provided a precisely zero-temperature sensitivity state of the structure. The negative thermo-optic coefficient of water counterbalances the positive shift in resonance wavelength originating from Si waveguides. The grating structure delocalizes the core field into the analyte region, which enhances field matter interaction to offer high bulk refractive index (RI) and affinity sensing. The advantage of incorporating grating structure in the ring has been demonstrated by comparing the bulk RI sensitivity and affinity sensitivity with and without the grating structure. Without the circular grating array, the bulk RI sensitivity is 214 nm/RIU and the affinity sensitivity is 0.139 nm/nm. Using grating in the ring structure offers an improved bulk RI sensitivity of 525 nm/RIU and an adlayer sensitivity of 0.515 nm/nm. We calculated the system limit of detection of the structure as ∼2×10−6 RIU. The fabrication tolerance of geometrical parameters, in the form of 10% variation in hole radius and 5% variation in other widths of our sensor, reveals a nominal temperature sensitivity of ∼6 pm/◦C. Changing the cladding analyte from pure water to other aqueous solutions, e.g. urine samples, also has a small impact on temperature sensitivity. The present work is useful in RI-dependent monitoring of the constituents present in aqueous medium-based bio-analytes samples in a variable ambient temperature environment.

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Section: Bulk Ri Sensingmentioning

confidence: 47%

“…where R is the ring-curvature radius, m is the mode number, and n eff is the effective index of the mode corresponding to the resonance wavelength λ r . If a grating array is embedded inside a conventional MRR, the intra-waveguide reflections impose another condition, which is expressed as [28],…”

Section: Working Principle Of Grating Assisted Mrrmentioning

confidence: 99%

Grating assisted temperature insensitive micro-ring resonator biosensor

Kumar Verma,

Kumari,

Mani Tripathi

2023

J. Opt.

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“…Table 2 Still in the spatial domain, generating OAM beams at the nanoscale is of significant interest for various applications in nanophotonics [95,96] and optical device miniaturization [97]. Recent developments in the creation and detection of optical vortex as well as some of its applications are observed in photonic integrated circuits [98][99][100][101][102][103], micro-ring resonators [104][105][106][107][108][109][110][111], metamaterials [112][113][114][115][116][117][118][119][120], plasmonic nanostructures [121][122][123][124], and metasurfaces [125][126][127][128], which offer precise control over the phase, amplitude, and polarization of light at the nanoscale. By engineering the meta-atoms on a metasurface, it is possible to design them to introduce a tailored phase gradient, resulting in the generation of OAM beams.…”

Section: Spatial-generating Methodsmentioning

confidence: 99%

Generation of Photon Orbital Angular Momentum and Its Application in Space Division Multiplexing

2023

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In the last three decades, light’s orbital angular momentum (OAM) has been of great interest because it has unique characteristics that make it sought after in many research fields, especially in optical communications. To address the exponentially increasing demands for higher data rates and capacity in optical communication systems, OAM has emerged as an additional degree of freedom for multiplexing and transmitting multiple independent data streams within a single spatial mode using the spatial division multiplexing (SDM) technology. Innumerable research findings have proven to scale up the channel capacity of communication links by a very high order of magnitude, allowing it to circumvent the reaching of optical fiber’s non-linear Shannon limit. This review paper provides a background and overview of OAM beams, covering the fundamental concepts, the various OAM generators, and the recent experimental and commercial applications of the OAM-SDM multiplexing technique in optical communications.

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