Photonic Crystal Sensors Based on Porous Silicon

Pacholski, Claudia

doi:10.3390/s130404694

Cited by 183 publications

(97 citation statements)

References 80 publications

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“…This allows for their use as selective chemical sensors for volatile vapors present in the ambient atmosphere. Due to the fast development of the response signal and relatively easy optical readout of optical sensors, various materials and setups are under investigation for fast and chemically selective sensors [7][8][9]. Among the high variety of inorganic materials there are also promising biological or bioinspired materials for sensors [3,10].…”

Section: Introductionmentioning

confidence: 99%

Substance specific chemical sensing with pristine and modified photonic nanoarchitectures occurring in blue butterfly wing scales

Piszter¹,

Kertész²,

Vértesy³

et al. 2014

Opt. Express

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Butterfly wing scales containing photonic nanoarchitectures act as chemically selective sensors due to their color change when mixing vapors in the atmosphere. Based on butterfly vision, we built a model for efficient characterization of the spectral changes in different atmospheres. The spectral shift is vapor specific and proportional with the vapor concentration. Results were compared to standard principal component analysis. The modification of the chemical properties of the scale surface by the deposition of 5 nm of Al 2 O 3 significantly alters the character of the optical response. This is proof of the possibility to purposefully tune the selectivity of such sensors.

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Section: Introductionmentioning

confidence: 99%

Substance specific chemical sensing with pristine and modified photonic nanoarchitectures occurring in blue butterfly wing scales

Piszter¹,

Kertész²,

Vértesy³

et al. 2014

Opt. Express

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“…Various nanoscale Si based waveguides have been reported in literature earlier [24][25][26][27][28][29].…”

mentioning

confidence: 99%

Nanoscale Silicon Waveguide Based Thermo-Optic Sensor Using a Compact Mach-Zehnder Interferometer

Rizal

Niraula

2016

Preprint

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A compact Mach-zehnder interferometer with a novel design of directional couplers and a phase shifter has been presented as a thermo-optical sensor. With the aim of reducing device size to micro and nano dimension silicon-on-insulator technology was employed. That allowed miniaturization of device size through the reduction of its cross sectional area to 0.066 μm 2 and the radius of curvature of both the arms of the directional coupler and S-bends of the phase shifter to 5 μm and C-bends to 3 μm. These nano size device dimensions made it possible to reduce the coupling gap to 0.2 μm, which resulted in a significant reduction in the coupling length. The device geometry and its performance characteristics were analyzed and optimized using coupled mode analysis and finite difference time domain simulation tools, respectively. The wavelength dependent transmission loss of the device was measured at different temperature to verify and validate its performance characteristics. Tested devices showed a remarkable temperature dependent transmission characteristic offering significant changes in transmission loss band -with as low as 0.45 0 C change in substrate temperature. The extinction ratio and the free spectral range of the device were 26 dB and 0.26 nm respectively in the wavelength range of 1549.5 nm -1550.5 nm. These results imply that the devices presented here can be used as compact and highly sensitive thermal sensors and optical switches.

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“…Homogeneous sensing is related to refractive index modification and surface sensing is related with the thickness change of biomolecular layer which is immobilized on surface. The optical sensors designed for the detection and quantification of chemical, sensing of pressure, force, displacement, investigation of biochemicals and its interaction with the system of cellular are developed and it is still a field of extensive research [4,5]. The optical sensor based on 2D-sillicon (Phc) platform with group of air holes is more sensible because surface state of air holes modified the local electromagnetic fields of propagated wave.…”

Section: Introductionmentioning

confidence: 99%

Multi-cavity Photonic Crystal Waveguide-Based Ultra-Compact Pressure Sensor

Upadhyay¹,

Kalyani²,

Charan³

2016

Proceedings of the International Congress on Information and Communication Technology

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In this paper, we proposed an ultra-compact pressure sensor. It is designed using silicon photonic crystal waveguide with the multiple cavities. For better light confinement and simplicity in fabrication 'air holes in slab type' structure is used. For the propagation of light, transverse magnetic (TM) polarization mode is considered. The combination of silicon waveguide and multi-cavities gives high quality factor. The designed sensor is based on the principle of resonance wavelength. Applied external pressure changes the optical and electronic property of sensor thus resonance wavelength of sensor is shifted. It works in the conventional (c) band and short (s) band of communication system. The proposed design has very high quality factor of 1720 and sensitivity of 0.50 nm/GPa. All designing work is performed using layout designer tool and simulation work is performed using finite-difference-time-domain (FDTD) method and plane wave expansion (PWE) method. Keywords

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Photonic Crystal Sensors Based on Porous Silicon

Cited by 183 publications

References 80 publications

Substance specific chemical sensing with pristine and modified photonic nanoarchitectures occurring in blue butterfly wing scales

Substance specific chemical sensing with pristine and modified photonic nanoarchitectures occurring in blue butterfly wing scales

Nanoscale Silicon Waveguide Based Thermo-Optic Sensor Using a Compact Mach-Zehnder Interferometer

Multi-cavity Photonic Crystal Waveguide-Based Ultra-Compact Pressure Sensor

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