Multiband charge-coupled device
Abstract/Contents
- Abstract
- Optical astronomical observation is one of our primary tools for answering fundamental physical questions, such as the Universe's formation, evolution and fate. Large-scale data from deep, optical, multi-color surveys are required to distinguish emerging, competing theories. However, today's color imaging methods typically require the use of band-pass filters or other wavelength selecting optics, because common image sensors are monochromatic. This paradigm is fundamentally inefficient, because astronomical sources are often broadband and most photons are wasted during wavelength selection. The multiband charge-coupled device (CCD) is introduced to circumvent the aforementioned limitation. It is a polychromatic image sensor fabricated on semiconductor-on-insulator (SOI) substrates with multiple device layers. It can be multifold more sensitive than a conventional CCD, because photons are collected and spectrally resolved in the substrate without external optics. It differs from other image sensors that feature vertically stacked photosites, because the SOI stack can be designed to minimize color crosstalk between the device layers. The improved sensitivity and color accuracy can benefit all filter-based color imaging systems, especially those that are limited by low-light imaging efficiency, such as optical astronomical telescopes. This dissertation presents the first experimental demonstration of multiband light absorption and charge extraction for a three-layer, front-illuminated, single-pixel device. Its design, simulation, fabrication and testing will be described. The ratio of the active layers' measured responsivities changes with wavelength, indicating that incident color information is captured in the substrate. This establishes the feasibility of combining multiband photon collection and charge readout in a monolithic SOI CCD pixel. It is an important step toward the realization of a full-scale multiband CCD.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2015 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Chang, Chu-En |
|---|---|
| Associated with | Stanford University, Department of Electrical Engineering. |
| Primary advisor | Howe, Roger Thomas |
| Thesis advisor | Howe, Roger Thomas |
| Thesis advisor | Kenney, Christopher J, (Physicist) |
| Thesis advisor | Roodman, Aaron J. (Aaron Jay), 1964- |
| Thesis advisor | Wong, Hon-Sum Philip, 1959- |
| Advisor | Kenney, Christopher J, (Physicist) |
| Advisor | Roodman, Aaron J. (Aaron Jay), 1964- |
| Advisor | Wong, Hon-Sum Philip, 1959- |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Chu-En Chang. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2015. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2015 by Chu-En Chang
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