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Characterizing large-area electro-optic crystals toward two-dimensional real-time terahertz imaging
- Source :
- Applied Optics. 48:5197
- Publication Year :
- 2009
- Publisher :
- The Optical Society, 2009.
-
Abstract
- We have characterized the homogeneity of large-area (10 mm x 10 mm) CdTe(110) and ZnTe(110) crystals using a raster electro-optic scanning method to assess their usability in two-dimensional electro-optic terahertz (THz) imaging with parallel read out. The spatial variation in the detected THz signal (at 0.2 and 0.645 THz, respectively) is due to nonuniform residual birefringence and scattering. For CdTe, this depends critically on the growth method, and has an important contribution from slip planes in the crystals, as is evident in the scanned images. For the highest-quality CdTe(110) crystals investigated, the rms signal variations are less than 15%, comparable to those for ZnTe(110). For electro-optic scanning, we introduce a hybrid measurement system based on a fs Nd:glass laser and a continuous-wave electronic THz source.
- Subjects :
- Birefringence
Materials science
business.industry
Scattering
Terahertz radiation
Materials Science (miscellaneous)
System of measurement
computer.file_format
Industrial and Manufacturing Engineering
Cadmium telluride photovoltaics
Terahertz spectroscopy and technology
Optics
Homogeneity (physics)
Optoelectronics
Business and International Management
Raster graphics
business
computer
Subjects
Details
- ISSN :
- 15394522 and 00036935
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Applied Optics
- Accession number :
- edsair.doi.dedup.....24245161c7ba3be51bdc5554ab230851