External modulators for TeraHertz Quantum Cascade Lasers based on electrically-driven active metamaterials
| Autor: | John F. O'Hara, Jerry Waldman, John L. Reno, Xomalin G. Peralta, A. J. Taylor, Jeremy B. Wright, Michael C. Wanke, William D. Goodhue, Jin Li, Richard D. Averitt, Michael J. Cich, Hou-Tong Chen, Erik W. Young, Willie J. Padilla, Igal Brener, Anthony J. Hoffman |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
business.industry Terahertz radiation Far-infrared laser Physics::Optics Metamaterial Surfaces and Interfaces Condensed Matter Physics Electronic Optical and Magnetic Materials Biomaterials Amplitude modulation Photomixing Optics Quantum dot laser Cascade Modulation Modeling and Simulation Optoelectronics Electrical and Electronic Engineering business |
| Zdroj: | Metamaterials. 4:83-88 |
| ISSN: | 1873-1988 |
| DOI: | 10.1016/j.metmat.2010.04.005 |
| Popis: | We have designed, fabricated and measured electrically-driven active metamaterials which operate as external modulators for TeraHertz Quantum Cascade Lasers. The modulation is achieved by applying a voltage to the metamaterial layer which actively displaces carriers from the n-doped layer causing changes in damping and frequency location of the lowest metamaterial response. We demonstrate their operation at 2.4 and 2.8 TeraHertz and obtain a maximum modulation depth of ∼60% with a large degree of modulation linearity. |
| Databáze: | OpenAIRE |
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