Highly sensitive integrated optical biosensors

2014 ◽  
Author(s):  
Vanessa Zamora ◽  
Peter Lützow ◽  
Martin Weiland ◽  
Daniel Pergande ◽  
Henning Schröder
Keyword(s):  
Optical Biosensors ◽  
Highly Sensitive ◽  
Integrated Optical

Thin Chitosan Films for Optical Gas Sensors

2014 ◽  
Vol 605 ◽  
pp. 536-539 ◽  
Author(s):  
Alexander Y. Mironenko ◽  
Alexander A. Sergeev ◽  
Sergey Voznesensky ◽  
Svetlana Y. Bratskaya
Keyword(s):  
Gas Sensors ◽  
Optical Sensors ◽  
Linear Response ◽  
Gaseous Ammonia ◽  
Natural Polysaccharide ◽  
Highly Sensitive ◽  
Integrated Optical ◽  
Ammonia Detection ◽  
Chitosan Films ◽  
Highly Sensitive Detection

Here we report on fabrication of integrated-optical sensors for relative humidity and ammonia detection based on natural polysaccharide chitosan. The sensing properties of the fabricated sensor to gaseous ammonia are presented. The sensor exhibits a linear response in the range of 1-300 ppm with the response time less than 1 second. It has been shown that 1 μm-thick chitosan-based waveguide film allows highly sensitive detection of RH level.

Double plasmon induced transparency in disk and nanobars coupled nanosystems and its application to plasmonic resonance sensing

2016 ◽  
Vol 30 (14) ◽  
pp. 1650150
Author(s):  
Fang Chen ◽  
Duanzheng Yao
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Slow Light ◽  
Highly Sensitive ◽  
Integrated Optical ◽  
High Figure ◽  
Induced Transparency ◽  
Optical Circuits ◽  
Coupled Harmonic Oscillator ◽  
Plasmon Induced Transparency

We demonstrate the realization of plasmon induced transparency (PIT) in a nanostructure composed of silver nanobars and a silver nanodisk. The optical properties of the planar metamaterials have been investigated theoretically in the paper. The classical coupled harmonic oscillator model demonstrates the PIT phenomenon in a nanodisk–nanobar system. Additionally, double PIT response is observed when two nanobars are located in proximity to the silver nanodisk. The PIT window wavelength and bandwidths can be efficiently tuned by controlling the geometric parameters such as the lengths of nanobars and the coupling distances between the nanodisk and nanobars. Moreover, the transparency window shows highly sensitive response to the refractive index of the environmental medium. A high figure of merit up to 15.5 of the asymmetrical system for refractive index sensing is achieved. The tunability of the PIT may have potential application on slow light and highly integrated optical circuits.

Highly-sensitive passive integrated optical spiral-shaped waveguide refractometer

1997 ◽  
Vol 71 (20) ◽  
pp. 2895-2897 ◽  
Author(s):  
G. J. Veldhuis ◽  
P. V. Lambeck
Keyword(s):  
Highly Sensitive ◽  
Integrated Optical

scholarly journals Highly sensitive spectroscopic detection of heme-protein submonolayer films by channel integrated optical waveguide

2007 ◽  
Vol 15 (9) ◽  
pp. 5595 ◽  
Author(s):  
Ismail E. Araci ◽  
Sergio B. Mendes ◽  
Nasuhi Yurt ◽  
Seppo Honkanen ◽  
N. Peyghambarian
Keyword(s):  
Optical Waveguide ◽  
Heme Protein ◽  
Highly Sensitive ◽  
Integrated Optical ◽  
Integrated Optical Waveguide

scholarly journals Aptamer-Conjugated Quantum Dot Optical Biosensors: Strategies and Applications

Chemosensors ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 318
Author(s):  
Dongmin Kim ◽  
Seungmin Yoo
Keyword(s):  
Quantum Dots ◽  
Size Composition ◽  
Optical Signal ◽  
Optical Biosensors ◽  
Specific Detection ◽  
Practical Applications ◽  
Highly Sensitive ◽  
Good Biocompatibility ◽  
Photochemical Stability ◽  
New Generation

Quantum dots (QDs) represent the promising new generation of luminophores owing to their size-, composition-, and surface-dependent tunable photoluminescence (PL) and photochemical stability. The development of various QD composites with high PL and good biocompatibility has facilitated the use of aptamer-functionalized QD biosensors for highly sensitive and specific detection of molecules in clinical and environmental settings. In addition to describing the recent advances in aptamer-based QD biosensor technology for the detection of diverse chemicals and biomolecules, this review provides recent examples of sensing strategies based on optical signal enhancement and quenching of QDs. It also discusses potential strategies for the development of biosensors to widen their practical applications across various scientific and technological fields.

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