Efficient and invisible : hybrid metal-semiconductor nanoscale photodetectors
Abstract/Contents
- Abstract
- Development of ultra-compact, silicon-compatible, and functional optoelectronic devices is essential for advancing technologies in emerging areas of optical interconnects solid state lighting, renewable energy. Photodetectors play a key role of interfacing between photonics and electronics but are plagued by a fundamental discrepancy between the dimension of state-of-the-art electronic devices and the optical diffraction limit. As we start to scale optoelectronic devices to the nanoscale dimensions, it is no longer possible to consider the optical properties of the absorbing semiconductor material alone without its surrounding components such as metallic contacts. On the other hand, nanotechnology is enabling the realization of hybrid devices and circuits in which nanoscale metal and semiconductor building blocks are woven together in a highly integrated fashion. Hereby, we will describe several optoelectronic devices for which the geometrical properties of the constituent semiconductor and metallic nanostructures are tuned in conjunction with the materials properties to realize multiple functions in the same physical space. In particular, we will demonstrate a series of photodetectors in which nanoscale semiconductor wires were used to boost light absorption due to excitation of optical resonances and the nanoscale metallic electrical contacts have been designed to either render the device 'invisible' over a broad frequency range, or act as optical antenna which funnels incident light into the device to further enhance efficiency. These structures belongs to a new class of devices that capitalize on the notion that nanostructures have a limited number of resonant, geometrically tunable optical modes whose hybridization and inter-modal interference can be tailored in a myriad of useful ways for enhanced optoelectronic devices with novel functionalities.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2013 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Fan, Pengyu |
|---|---|
| Associated with | Stanford University, Department of Materials Science and Engineering. |
| Primary advisor | Brongersma, Mark L |
| Thesis advisor | Brongersma, Mark L |
| Thesis advisor | Cui, Yi, 1976- |
| Thesis advisor | Salleo, Alberto |
| Advisor | Cui, Yi, 1976- |
| Advisor | Salleo, Alberto |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Pengyu Fan. |
|---|---|
| Note | Submitted to the Department of Materials Science and Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2013. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2013 by Pengyu Fan
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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