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Micromachines
Special Issues
Photonic MEMS and Optofluidic Devices
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Photonic MEMS and Optofluidic Devices

A special issue of Micromachines (ISSN 2072-666X).

Deadline for manuscript submissions: closed (31 January 2018) | Viewed by 13195

Special Issue Editors

Prof. Dr. Tarik Bourouina

E-Mail Website
Guest Editor
ESIEE/Esycom-Lab, Cité Descartes 2 Bd Blaise Pascal, 93162 Noisy-le-Grand, France
Interests: water research; MEMS; micro-optics, nanotechnology, optical sensors
Special Issues, Collections and Topics in MDPI journals
Dr. Yasser M. Sabry

E-Mail Website
Guest Editor
Electronics and Electrical Communication Engineering, Faculty of Engineering, Ain-Shams University, 1 Elsarayat St., Abbassia, Cairo 11517, Egypt
Interests: microsystems; photonics; fiber sensors; optofluidics; gas sensing; optical IoT
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are very pleased to introduce this Special Issue on “Photonic MEMS and Optofluidic Devices”.

The integration of micro actuators and other forms of movable structures within a silicon photonic chip enables manipulation and motion control of micro-optical components, leading to a wide variety of photonic MEMS. While the original drivers of the growth of this field are related to optical fiber telecommunications and display applications, the most recent applications include handheld spectrometers, swept laser sources, micro LiDARs, optical heads for non-invasive biomedical imaging, as well as confocal microscopy. On the other hand, an important key for further development of microfluidic devices—in the lab-on-chip format—is the co-integration of optical technologies, including light sources and micro-optical components, within the microfluidic environments leveraging the broad range of light-matter interaction mechanisms, high sensitivity of the optical resonators and the localization of light and optical forces. This integration enables implementation of numerous functionalities including cell-sorting, refractometry, biosensing, optical spectrometry, fluorescence imaging, on-chip microscopy, liquid-die lasing and photocatalysis; all relate to the emerging field of "Optofluidics", exploiting the unique physics of coupling micro/nanophotonics with micro/nanofluidics and the corresponding technologies.

Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on novel methodological, technological and engineering developments in the area of Photonic MEMS and Optofluidic Devices.

Prof. Dr. Tarik Bourouina
Dr. Yasser M. Sabry
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Tunable lasers and optical filters
  • Optical scanners
  • Micro-spectrometers
  • Micro-LiDARs
  • Coherent, confocal and on-chip microscopy
  • Photonic IoT
  • Tunable optofludics
  • Liquid-core waveguides and liquid lens
  • Fluidic refractometry
  • Optical biosensing
  • Optical manipulation, sorting and recognition

Published Papers (3 papers)

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Research

9 pages, 3405 KiB  
Article
High-Q Fabry–Pérot Micro-Cavities for High-Sensitivity Volume Refractometry
by Noha Gaber, Yasser M. Sabry, Mazen Erfan, Frédéric Marty and Tarik Bourouina
Micromachines 2018, 9(2), 54; https://doi.org/10.3390/mi9020054 - 31 Jan 2018
Cited by 12 | Viewed by 3509
Abstract
This work reports a novel structure for a Fabry–Pérot micro cavity that combines the highest reported quality factor for an on-chip Fabry–Pérot resonator that exceeds 9800, and a very high sensitivity for an on-chip volume refractometer based on a Fabry–Pérot cavity that is [...] Read more.
This work reports a novel structure for a Fabry–Pérot micro cavity that combines the highest reported quality factor for an on-chip Fabry–Pérot resonator that exceeds 9800, and a very high sensitivity for an on-chip volume refractometer based on a Fabry–Pérot cavity that is about 1000 nm/refractive index unit (RIU). The structure consists of two cylindrical Bragg micromirrors that achieve confinement of the Gaussian beam in the plan parallel to the chip substrate, while for the perpendicular plan, external fiber rod lenses (FRLs) are placed in the optical path of the input and the output of the cavity. This novel structure overcomes number of the drawbacks presented in previous designs. The analyte is passed between the mirrors, enabling its detection from the resonance peak wavelengths of the transmission spectra. Mixtures of ethanol and deionized (DI)-water with different ratios are used as analytes with different refractive indices to exploit the device as a micro-opto-fluidic refractometer. The design criteria are detailed and the modeling is based on Gaussian-optics equations, which depicts a scenario closer to reality than the usually used ray-optics modeling. Full article
(This article belongs to the Special Issue Photonic MEMS and Optofluidic Devices)
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2607 KiB  
Article
Optofluidic Lab-on-a-Chip Fluorescence Sensor Using Integrated Buried ARROW (bARROW) Waveguides
by Thomas Wall, Johnny McMurray, Gopikrishnan Meena, Vahid Ganjalizadeh, Holger Schmidt and Aaron R. Hawkins
Micromachines 2017, 8(8), 252; https://doi.org/10.3390/mi8080252 - 17 Aug 2017
Cited by 14 | Viewed by 4813
Abstract
Optofluidic, lab-on-a-chip fluorescence sensors were fabricated using buried anti-resonant reflecting optical waveguides (bARROWs). The bARROWs are impervious to the negative water absorption effects that typically occur in waveguides made using hygroscopic, plasma-enhanced chemical vapor deposition (PECVD) oxides. These sensors were used to detect [...] Read more.
Optofluidic, lab-on-a-chip fluorescence sensors were fabricated using buried anti-resonant reflecting optical waveguides (bARROWs). The bARROWs are impervious to the negative water absorption effects that typically occur in waveguides made using hygroscopic, plasma-enhanced chemical vapor deposition (PECVD) oxides. These sensors were used to detect fluorescent microbeads and had an average signal-to-noise ratio (SNR) that was 81.3% higher than that of single-oxide ARROW fluorescence sensors. While the single-oxide ARROW sensors were annealed at 300 °C to drive moisture out of the waveguides, the bARROW sensors required no annealing process to obtain a high SNR. Full article
(This article belongs to the Special Issue Photonic MEMS and Optofluidic Devices)
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2001 KiB  
Article
Rapid Screening of Graphitic Carbon Nitrides for Photocatalytic Cofactor Regeneration Using a Drop Reactor
by Xiaowen Huang, Huimin Hao, Yang Liu, Yujiao Zhu and Xuming Zhang
Micromachines 2017, 8(6), 175; https://doi.org/10.3390/mi8060175 - 02 Jun 2017
Cited by 13 | Viewed by 4363
Abstract
Artificial photosynthesis is the imitation of natural photosynthesis, which promises an efficient way to use solar energy to synthesize organic matters, in which the key step is the coenzyme regeneration (NADH/NADPH). To achieve an efficient regeneration rate, various photocatalysts have been developed, such [...] Read more.
Artificial photosynthesis is the imitation of natural photosynthesis, which promises an efficient way to use solar energy to synthesize organic matters, in which the key step is the coenzyme regeneration (NADH/NADPH). To achieve an efficient regeneration rate, various photocatalysts have been developed, such as g-C3N4 and mesoporous carbon nitride (mpg-C3N4). Generally, efficiency determination of different photocatalysts requires laborious experiments, high consumption of reagents, and a considerable amount of time. Here, based on the one-step artificial photosystem I method, we processed the analytical experiment in a very simple PDMS well (20 μL, a drop) to achieve a rapid screening of photocatalysts. For comparison, we used two types of graphitic carbon nitrides, few-layer g-C3N4 and mpg-C3N4. Compared with the slurry systems, firstly, the regeneration rate of mpg-C3N4 drop-reactor system is 4.3 times and 7.1 times those of the few-layer g-C3N4-slurry system and mpg-C3N4-slurry system, respectively. Secondly, this one-drop method reduces the typical verification time from 90 min to 5 min and lowers the liquid volume from 20 mL to 20 μL. Thirdly, this operation is a pump-free and soft lithography technique-free process. The miniaturization of the photocatalytic reaction in the PDMS well improves the regeneration rates, saves samples, and achieves high-throughput screening of multiple photocatalysts. Full article
(This article belongs to the Special Issue Photonic MEMS and Optofluidic Devices)
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