[Illinois] ECE 416 Optical Sensors III

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Abstract

           In this lecture, we finished our discussion over optical sensors. We started with discussing a photon moving between 2 mirrors with 100% efficiency, the photon gets to "sample" the media between the mirrors with no loss. This was able to be compared to an acoustic resonator and the wavelength that moves within it. However, the waves in the optical sensor represent an Electric Field that oscillates like a wave, but between positive and negative. In reality, though there is no 100% efficiency and the Electric Field would decay. Looking at an optical resonator biosensor, we are looking for a strong interaction with the media and a high Quality Factor with a good resolution for small wavelengths can be measured. Then, we took a look at 1D and 2D Surface Photonic Crystals and how they work and operate with the properties using the photon theory above. The structure is able to resonate one wavelength of light and have Quality Factor better than a Surface Plasmon Resonance 100x better. Important factors that determine the structure results include the surface and the refractive index. Also dielectric resonators are used rather than metal ones in order to minimize the loss. This maximizes the sensitivity. The last thing discussed was the fabrication of these sensors.

Bio

My research group is focused on the application of sub-wavelength optical phenomena and fabrication methods to the development of novel devices and instrumentation for the life sciences. The group is highly interdisciplinary, with expertise in the areas of microfabrication, nanotechnology, computer simulation, instrumentation, molecular biology, and cell biology. In particular, we are working on biosensors based upon photonic crystal concepts that can either be built from low-cost flexible plastic materials, or integrated with semiconductor-based active devices, such as light sources and photodetectors, for high performance integrated detection systems.

Using a combination of micrometer-scale and nanometer-scale fabrication tools, we are devising novel methods and materials for producing electro-optic devices with nanometer-scale features that can be scaled for low-cost manufacturing. Many of our techniques are geared for compatibility with flexible plastic materials, leading to applications such as low cost disposable sensors, wearable sensors, flexible electronics, and flexible displays. Because our structures manipulate light at a scale that is smaller than an optical wavelength, we rely on computer simulation tools such as Rigorous Coupled Wave Analysis (RCWA) and Finite Difference Time Doman (FDTD) to model, design, and understand optical phenomena within photonic crystals and related devices.

In addition to fabricating devices, our group is also focused on the design, prototyping, and testing of biosensor instrumentation for high sensitivity, portability, and resolution. Advanced instruments enable high resolution imaging of biochemical and cellular interactions with the ability to monitor images of biochemical interactions as a function of time. Using the sensors and instrumentation, we are exploring new applications for optical biosensor technology including protein microarrays, biosensor/mass spectrometry systems, and microfluidics-based assays using nanoliter quantities of reagents. The methods and systems developed in the laboratory are applied in the fields of life science research, drug discovery, diagnostic testing, and environmental monitoring. -From Professor Cunningham's Faculty Profile

Cite this work

Researchers should cite this work as follows:

  • Brian Cunningham (2013), "[Illinois] ECE 416 Optical Sensors III," https://nanohub.org/resources/17354.

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Time

Location

University of Illinois, Urbana-Champaign, IL

Submitter

NanoBio Node, Obaid Sarvana, George Daley

Tags

[Illinois] ECE 416 Lecture 20: Optical Sensors III
  • What is an optical resonator? 1. What is an optical resonator? 0
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  • Acoustic Resonator 2. Acoustic Resonator 264.79728239290597
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  • The Simplest Optical Resonator: Two Mirrors 3. The Simplest Optical Resonator… 396.080204702872
    00:00/00:00
  • The Simplest Optical Resonator: Two Mirrors 4. The Simplest Optical Resonator… 460.66793135395068
    00:00/00:00
  • The Simplest Optical Resonator: Two Mirrors 5. The Simplest Optical Resonator… 695.83667887236959
    00:00/00:00
  • Optical Resonator Biosensor Biomolecules 6. Optical Resonator Biosensor Bi… 746.78784135527417
    00:00/00:00
  • Desired Optical Properties 7. Desired Optical Properties 936.08814576256225
    00:00/00:00
  • Example Optical Resonators 8. Example Optical Resonators 1020.1389685445802
    00:00/00:00
  • Enhanced E Fields: Optical Resonators 9. Enhanced E Fields: Optical Res… 1306.8787223717297
    00:00/00:00
  • Movie - Simulation of Photonic Crystal Standing Wave 10. Movie - Simulation of Photonic… 1309.8539727356952
    00:00/00:00
  • 1D Surface Photonic Crystals 11. 1D Surface Photonic Crystals 1536.3449066925489
    00:00/00:00
  • 1D Surface Photonic Crystals 12. 1D Surface Photonic Crystals 1569.1966294613317
    00:00/00:00
  • 2D Surface Photonic Crystals 13. 2D Surface Photonic Crystals 1612.3377597388273
    00:00/00:00
  • Far Field Behavior 14. Far Field Behavior 1645.685357568271
    00:00/00:00
  • Near Field Behavior 15. Near Field Behavior 1871.9283539947942
    00:00/00:00
  • Label-Free Biodetection with a Photonic Crystal 16. Label-Free Biodetection with a… 2064.947721357039
    00:00/00:00
  • Fabrication by Nanoreplica Molding 17. Fabrication by Nanoreplica Mol… 2140.4446993426568
    00:00/00:00
  • Fabrication on Continuous Rolls of Film 18. Fabrication on Continuous Roll… 2239.1238364141705
    00:00/00:00
  • Biosensor Microplates 19. Biosensor Microplates 2268.7523712886577
    00:00/00:00
  • Photonic Crystal Label-Free Biosensor 20. Photonic Crystal Label-Free Bi… 2333.0921604094056
    00:00/00:00
  • Optical Fiber Probe Readout Instrument 21. Optical Fiber Probe Readout In… 2377.5969471037188
    00:00/00:00
  • Fiber Probe Biosensor Readout Instrument 22. Fiber Probe Biosensor Readout … 2407.3494507433716
    00:00/00:00
  • Porcine Rotavirus Detection 23. Porcine Rotavirus Detection 2447.7632681872324
    00:00/00:00
  • Intact Virus Particle Detection Assay 24. Intact Virus Particle Detectio… 2697.9322362906428
    00:00/00:00
  • Dose/Response and ELISA Comparison 25. Dose/Response and ELISA Compar… 2732.40582267314
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