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Design and Implementation of Transmission-Modulated Photoconductive Decay System for Recombination Lifetime Measurements

Erdman, Emily Clare
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1480535397035212

Abstract Details

2016, Master of Science (M.S.), University of Dayton, Electro-Optics.
Today's problems in silicon photonics will likely require an integration of CMOS compatible, high quality thin films grown on top of Si. GeSn is one of these thin film contenders and is currently being grown on Si platforms. CMOS devices require planar processing and low defect levels in the crystalline structure. A metric that will allow us to quantify defect densities in GeSn is recombination lifetime. Due to their thin film nature and band structure, measuring recombination lifetime in thin films Ge and GeSn can be difficult using industry standard techniques. Thus, we have developed a novel, contactless method in order to measure carrier lifetime called transmission-modulated photoconductive decay (TMPCD). The TMPCD system was first designed and fabricated and then fully characterized with respect to its optical and RF components. The system was validated by measuring lifetimes in bulk Si and bulk Ge. The recombination lifetimes were measured to be 2.6±0.5 µs and 7.5±0.7 µs for Si and Ge, respectively. These values were found to agree with the values from the literature that were obtained using alternative measurement techniques. Preliminary results so far do not indicate any usable recombination lifetime measurements for GeSn. However, we believe that fine tuning the TMPCD system will allow us to obtain recombination lifetime measurements in GeSn.
Jay Mathews, Dr. (Committee Chair)
Imad Agha, Dr. (Committee Member)
Partha Banerjee, Dr. (Committee Member)
78 p.
Optics
Recombination lifetime, transmission modulated photoconductive decay, silicon photonics, thin films, germanium and germanium tin

Recommended Citations

Citations

  • Erdman, E. C. (2016). Design and Implementation of Transmission-Modulated Photoconductive Decay System for Recombination Lifetime Measurements [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1480535397035212

    APA Style (7th edition)

  • Erdman, Emily. Design and Implementation of Transmission-Modulated Photoconductive Decay System for Recombination Lifetime Measurements. 2016. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1480535397035212.

    MLA Style (8th edition)

  • Erdman, Emily. "Design and Implementation of Transmission-Modulated Photoconductive Decay System for Recombination Lifetime Measurements." Master's thesis, University of Dayton, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1480535397035212

    Chicago Manual of Style (17th edition)

dayton1480535397035212
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© 2016, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.