ZnTe (zinc telluride) is an electro-optic crystal used in terahertz detection research. Choosing a crystal requires more than selecting the material name: the probe wavelength, target frequency range, crystal thickness and optical arrangement should be considered together.
Why probe wavelength and crystal thickness matter
In electro-optic sampling, a terahertz field changes the polarization of an optical probe in the crystal. The measured response depends on phase matching and absorption as well as the detection arrangement.
A numerical study presented at IPAC2014 compared ZnTe, GaAs and GaP for a proposed FEL terahertz detector. It evaluated ZnTe with an 800 nm probe and showed a trade-off between response amplitude and bandwidth as crystal thickness changed. These are model results for the stated conditions, not universal specifications or acceptance data for supplied crystals.
Prepare a specification for your experiment
| Item | Information to provide |
|---|---|
| Measurement objective | Electro-optic sampling, spectroscopy or imaging research |
| Optical probe | Wavelength, pulse duration, repetition rate and beam size |
| Terahertz signal | Target frequency range and expected field conditions |
| Crystal geometry | Orientation, clear aperture, thickness and tolerances |
| Optical interfaces | Surface finish, coating requirements and mounting arrangement |
| Acceptance criteria | Required inspection, measurement method and reporting format |
Separate research results from purchase specifications
Use published studies to define the experiment and questions for the supplier. Ask which material grade, dimensions, inspection records and optical tests are available for the proposed order. A publication about ZnTe does not establish the performance, growth method or defect level of another supplier’s material.
For an optical-material inquiry, send your drawing and measurement requirements through our technical sales contact page. Material availability and the scope of supply must be confirmed before quotation. You can also browse the current ATR Crystal product range.
Technical reference
Bang Wu et al., Comparison of the Detection Performance of Three Nonlinear Crystals for the Electro-optic Sampling of a FEL-THz Source, IPAC2014, paper THPRO017. DOI: 10.18429/JACoW-IPAC2014-THPRO017. This reference reports numerical analysis, not ATR product testing.