Highly Sensitive and Tunable Fano-like Rod-Type Silicon Photonic Crystal Refractive Index Sensor

Date

2021-01-01

Author

Kılıç, Selahattin Cem
Kocaman, Serdar

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

164
views

0
downloads

IEEEA highly sensitive and tunable 2D rod-type silicon photonic crystal cavity based biosensor configuration has been designed and numerically analyzed. The structure is optimized so that the light-matter interaction is maximized in the cavity region. Out-of-plane light confinement is achieved by sandwiching the rods between metal plates, and tuning is achieved by introducing an air-gap between on top of the rods and the metal plate. A single rod is positioned in the middle of the waveguide so that the cavity Q-factor is enhanced by obtaining a Fano-like resonance. The air-gap between the rods and the metal plate acts as a slot structure, confining E-field in that small region and simultaneously decreasing mode-volume while making the resonance characteristics highly dependent on the gap size. This creates the opportunity to tune the resonance characteristics by electrostatic actuation via applying voltage to the top and bottom metal plates. The proposed structure has a sensitivity value of 1039 nm/RIU, a mode volume of 0.214 (λ/n)3, flexible tuning capabilities, and is the first tunable 2D PhC rod-type refractive index sensor.

URI

https://hdl.handle.net/11511/88698

Journal

IEEE Sensors Journal

DOI

https://doi.org/10.1109/jsen.2021.3050062

Collections

Department of Electrical and Electronics Engineering, Article

Suggestions

OpenMETU
Core

Optimized spacer layer thickness for plasmonic-induced enhancement of photocurrent in a-Si:H Saleh, Z. M.; NASSER, H; ÖZKOL, E; GÜNÖVEN, M; Abak, Musa Kurtuluş; Canlı, Sedat; Bek, Alpan; Turan, Raşit (2015-10-24) Plasmonic interfaces consisting of silver nanoparticles of different sizes (50-100 nm) have been processed by the self-assembled dewetting technique and integrated to hydrogenated amorphous silicon (a-Si:H) using SiNx spacer layers to investigate the dependence of optical trapping enhancement on spacer layer thickness through the enhancements in photocurrent. Samples illuminated from the a-Si:H side exhibit a localized surface plasmon resonance (LSPR) that is red-shifted with the increasing particle size an...
High Sensitivity Fano-Like Rod-Type Silicon Photonic Crystal Refractive Index Sensor Kılıç, Selahattin Cem; Kocaman, Serdar (2020-09-27) © 2020 IEEE.A rod-type silicon photonic crystal structure has been designed and numerically analyzed for the first time in a sensing application. Rods are sandwiched between Perfect Electric Conductor (PEC) plates to obtain 2D PhC characteristics. Light-matter interaction is maximized by strong light localization in the air region, cavity Q-factor is enhanced with Fano-like resonance, and an ultra-high sensitivity up to 1039 nm/RIU is observed.
Multichromic Vanadium Pentoxide Thin Films Through Ultrasonic Spray Deposition Tutel, Yusuf; Durukan, Mete Batuhan; Cakmak, Huseyin; Koylan, Serkan; Hekmat, Farzaneh; Ozensoy, Emrah; Ozbay, Ekmel; UDUM, YASEMİN; Toppare, Levent; Unalan, Husnu Emrah (2021-10-01) Vanadium pentoxide (V2O5) is a highly promising material for optoelectronic applications due to its wide optical band gap, significant thermal/chemical stability, and intriguing multichromic properties. Nonetheless, the production of uniform and crack-free V2O5 thin films over large areas via conventional deposition methods remain to be a challenge. In this work, we demonstrate deposition of microscopically uniform, large area (15 cm x 15 cm), nanocrystalline and multichromic V2O5 thin films onto fluorine-d...
Integrated optical modulators with zero index metamaterials based on photonic crystal slab waveguides Yildirim, Mustafa; GÖVDELİ, ALPEREN; Kocaman, Serdar (2019-01-01) A novel integrated optical modulator design is presented using zero index metamaterial-based Mach-Zehnder Interferometer with photonic crystal phase shifters. The phase modulation relies on the shift between the photonic bandgaps having non-zero and zero effective refractive indices. A small change in the bulk index results in an effective index change between the arms of the MZI due to the disturbance of the band structure. Thus, such a structure provides a new approach for phase modulation on integrated o...
Direct magnetic imaging of ferromagnetic domain structures by room temperature scanning hall probe microscopy using a bismuth micro-hall probe SANDHU, ADARSH; MASUDA, HİROSHİ; Oral, Ahmet; BENDİNG, SİMON J (IOP Publishing, 2001-05-15) A bismuth micro-Hall probe sensor with an integrated scanning tunnelling microscope tip was incorporated into a room temperature scanning Hall probe microscope system and successfully used for the direct magnetic imaging of microscopic domains of low coercivity perpendicular garnet thin films and demagnetized strontium ferrite permanent magnets. At a driving current of 800 muA, the Hall coefficient, magnetic field sensitivity and spatial resolution of the Bi probe were 3.3 x 10(-4) Omega /G, 0.38 G/root Hz ...

Citation Formats

S. C. Kılıç and S. Kocaman, “Highly Sensitive and Tunable Fano-like Rod-Type Silicon Photonic Crystal Refractive Index Sensor,” IEEE Sensors Journal, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/88698.