Numerical analysis of effective refractive index sensor based on slot micro-ring and Bragg grating

A novel design of a silicon-on-insulator (SOI)-based resonator based on slot micro-ring and Bragg gratings is presented. The corrugated Bragg gratings are structured on both sides of slot micro-ring waveguides. The variation of the effective refractive index is detected by monitoring the shift of the spectral of the resonator. The transmission spectrum and field distribution of the sensor structures are simulated using finite-difference time-domain (FDTD) method. With the combination of the Bragg gratings, the measurement range of the sensor significantly increases without the restriction of a free spectral range (FSR). Our proposed sensor design provides a promising candidate for on-chip integration with other silicon photonic element.

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A Plasmonic Chip-Scale Refractive Index Sensor Design Based on Multiple Fano Resonances

Sensors ◽

10.3390/s18103181 ◽

2018 ◽

Vol 18 (10) ◽

pp. 3181 ◽

Cited By ~ 16

Author(s):

Kunhua Wen ◽

Li Chen ◽

Jinyun Zhou ◽

Liang Lei ◽

Yihong Fang

Keyword(s):

Refractive Index ◽

Fdtd Method ◽

High Sensitivity ◽

Refractive Index Sensor ◽

Fano Resonances ◽

Metal Insulator Metal ◽

High Figure ◽

On Chip ◽

Difference Time ◽

Sub Wavelength

In this paper, multiple Fano resonances preferred in the refractive index sensing area are achieved based on sub-wavelength metal-insulator-metal (MIM) waveguides. Two slot cavities, which are placed between or above the MIM waveguides, can support the bright modes or the dark modes, respectively. Owing to the mode interferences, dual Fano resonances with obvious asymmetrical spectral responses are achieved. High sensitivity and high figure of merit are investigated by using the finite-difference time-domain (FDTD) method. In view of the development of chip-scale integrated photonics, two extra slot cavities are successively added to the structure, and consequently, three and four ultra-sharp Fano peaks with considerable performances are obtained, respectively. It is believed that this proposed structure can find important applications in the on-chip optical sensing and optical communication areas.

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Highly sensitive compact refractive index sensor based on phase-shifted sidewall Bragg gratings in slot waveguide

Applied Optics ◽

10.1364/ao.53.000096 ◽

2013 ◽

Vol 53 (1) ◽

pp. 96 ◽

Cited By ~ 29

Author(s):

Xin Wang ◽

Christi K. Madsen

Keyword(s):

Refractive Index ◽

Bragg Gratings ◽

Refractive Index Sensor ◽

Slot Waveguide ◽

Highly Sensitive

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Optical Refractive-Index Sensor Based on Dual Fiber-Bragg Gratings Interposed With a Multimode-Fiber Taper

IEEE Photonics Technology Letters ◽

10.1109/lpt.2006.889010 ◽

2007 ◽

Vol 19 (1) ◽

pp. 30-32 ◽

Cited By ~ 45

Author(s):

Li-Yang Shao ◽

A. Ping Zhang ◽

Wei-Sheng Liu ◽

Hong-Yan Fu ◽

Sailing He

Keyword(s):

Refractive Index ◽

Fiber Bragg Gratings ◽

Bragg Gratings ◽

Refractive Index Sensor ◽

Multimode Fiber ◽

Fiber Taper

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Numerical investigation of an optimized plasmonic on-chip refractive index sensor for temperature and blood group detection

Results in Physics ◽

10.1016/j.rinp.2020.103611 ◽

2020 ◽

Vol 19 ◽

pp. 103611

Author(s):

Rakibul Hasan Sagor ◽

Md. Farhad Hassan ◽

Sabiha Sharmin ◽

Tasnim Zaman Adry ◽

Md. Arefin Rabbi Emon

Keyword(s):

Refractive Index ◽

Numerical Investigation ◽

Blood Group ◽

Refractive Index Sensor ◽

Group Detection ◽

On Chip

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Optical refractive index biosensor using evanescently coupled lateral Bragg gratings on silicon-on-insulator

Japanese Journal of Applied Physics ◽

10.7567/jjap.55.08re09 ◽

2016 ◽

Vol 55 (8S3) ◽

pp. 08RE09 ◽

Cited By ~ 4

Author(s):

Manuel Mendez-Astudillo ◽

Hiroki Takahisa ◽

Hideaki Okayama ◽

Hirochika Nakajima

Keyword(s):

Refractive Index ◽

Bragg Gratings ◽

Silicon On Insulator

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2x2 Optical Switch Based on Silicon-on-Insulator Microring Resonator

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.378-379.531 ◽

2011 ◽

Vol 378-379 ◽

pp. 531-534

Author(s):

B. Mardiana ◽

Hanim Abdul Razak ◽

H. Hazura ◽

S. Shaari ◽

P. Susthitha Menon ◽

...

Keyword(s):

Optical Switch ◽

Free Spectral Range ◽

Fdtd Method ◽

Single Mode ◽

Microring Resonator ◽

Silicon On Insulator ◽

Electric Signal ◽

Compact Size ◽

Near Future ◽

Difference Time

In near future, silicon-on-insulator (SOI) microring resonator are expected to be basic components for wavelength filtering and switching due to their compact size and wide free spectral range (FSR). In this paper, a 2X2 optical switch by using active microring resonator is proposed. The switch is consists of second order serially cascaded microring coupled to a pair of waveguide. The ON/OFF state of the design is control by electric signal which will vary the refractive index. The device is design to operate at 1.55µm wavelength. With a 500nm x 200nm rib dimensions, the design is proven to have single mode behaviour. Finite-Difference Time-Domain (FDTD) method simulation by RSOFT software is use to characterize the device performance. The results show that the 2X2 optical switch proposed can be an efficient device to be functioning in WDM application.

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Photonic Nanojet Generation Using Integrated Silicon Photonic Chip with Hemispherical Structures

Photonics ◽

10.3390/photonics8120586 ◽

2021 ◽

Vol 8 (12) ◽

pp. 586

Author(s):

Aneesh Vincent Veluthandath ◽

Ganapathy Senthil Murugan

Keyword(s):

Refractive Index ◽

Focal Plane ◽

Focal Plane Arrays ◽

High Index ◽

Photonic Nanojet ◽

Oblate Spheroids ◽

Silicon Photonic ◽

Potential Applications ◽

Cmos Compatible ◽

On Chip

Photonic nanojet (PNJ) is a tightly focused diffractionless travelling beam generated by dielectric microparticles. The location of the PNJ depends on the refractive index of the material and it usually recedes to the interior of the microparticle when the refractive index is higher than 2, making high index materials unsuitable to produce useful PNJs while high index favours narrower PNJs. Here we demonstrate a design of CMOS compatible high index on-chip photonic nanojet based on silicon. The proposed design consists of a silicon hemisphere on a silicon substrate. The PNJs generated can be tuned by changing the radius and sphericity of the hemisphere. Oblate spheroids generate PNJs further away from the refracting surface and the PNJ length exceeds 17𝜆 when the sphericity of the spheroid is 2.25 The proposed device can have potential applications in focal plane arrays, enhanced Raman spectroscopy, and optofluidic chips.

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