A Distributed Terahertz Metasurface with Cold-Electron Bolometers for Cosmology Missions
| Autor: | Alexander S. Sobolev, Michael Yu. Larionov, Leonid Kuzmin, Behrokh Beiranvand |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Terahertz radiation QH301-705.5 QC1-999 02 engineering and technology 01 natural sciences Noise (electronics) law.invention Responsivity Optics law 0103 physical sciences terahertz detector General Materials Science cold-electron bolometer frequency selective metasurface Wideband Biology (General) 010306 general physics Instrumentation QD1-999 Fluid Flow and Transfer Processes Physics business.industry Process Chemistry and Technology Bolometer General Engineering cryogenic device 021001 nanoscience & nanotechnology Chip Engineering (General). Civil engineering (General) Computer Science Applications Lens (optics) Chemistry TA1-2040 0210 nano-technology business Voltage |
| Zdroj: | Applied Sciences, Vol 11, Iss 4459, p 4459 (2021) Applied Sciences Volume 11 Issue 10 |
| ISSN: | 2076-3417 |
| Popis: | We developed and tested a 2D periodic array of cold-electron bolometers arranged into a wideband frequency selective metasurface that absorbs more than 70% of the incident power in the frequency range 100–800 GHz. The array had 10 × 10 unit cells, each containing four bolometers incorporated into a ring. The chip with bolometers was mounted on the back side of the silicon lens without a back-reflector. Preliminary experiments demonstrated voltage responsivity as high as 109 V/W for the current-biased series array. Simulation of the noise performance shows realization of background noise-limited performance with NEPtot < NEPphot for the optical power load P0 > 15 pW. Results of numerical simulation made for the unit cell of the array are presented together with the equivalent diagram based on lumped network elements. The unit cell also was developed numerically to operate in two radiation modes. |
| Databáze: | OpenAIRE |
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