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ZnTe Crystal

POC-OC-122511-ZnTe Crystal

  • High applicability for THz wave generation, detection, and optical limiters.
  • Exceptional purity levels ranging from 99.995% to 99.999%.
  • Maximum aperture size of 30 mm × 30 mm and minimum thickness of 0.01 mm.
  • High-quality ZnTe crystals with [100] and [111] crystal orientations available.
  • Outstanding electro-optic coefficient (y41 = 4.0 pm/V) for advanced applications.

Customizable Components Available for This Material to Meet Your Specific Needs!

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ZnTe Crystal Material General Description

Zinc Telluride (ZnTe) is a direct-bandgap II-VI compound semiconductor material with a cubic zinc blende crystal structure. It is an ideal electro-optic crystal widely utilized in terahertz (THz) wave generation and detection due to its exceptional optical and electronic properties. With a wide range of applications, ZnTe crystals boast high transmission efficiency in the mid-infrared (7-12 μm) and visible spectrum.

The crystal’s intrinsic qualities include a high electro-optic coefficient, moderate birefringence, and excellent purity levels that contribute to its performance in high-power and ultrafast laser systems. Its compact lattice structure ensures low defect density, making it a reliable choice for industrial-grade THz imaging and spectroscopy applications. Furthermore, ZnTe’s ability to support ultra-thin and large-area production makes it a versatile option for demanding optical setups.

General Applications and Examples

ZnTe crystals are extensively utilized in a variety of high-performance optical and electronic fields:

  • Terahertz Wave Generation and Detection: ZnTe serves as a critical nonlinear optical material for efficient THz wave production via optical rectification and its detection using electro-optic sampling.
  • Electro-Optic Devices: With its high electro-optic coefficient, ZnTe is integrated into modulators and other advanced photonics applications.
  • Optical Limiters and Detectors: ZnTe demonstrates exceptional transmission properties, making it valuable for optical limiters and mid-infrared detectors.
  • Spectroscopy and Imaging: Widely employed in THz spectroscopy and imaging systems, ZnTe enables the precise identification of materials and structures due to its excellent bandwidth capabilities.

Chemical and Structural Properties

Property

ZnTe Crystal

Crystal Structure

Cubic Zinc Blende

Lattice Constant

a = 6.1034 nm

Density

5.633 g/cm³

Bandgap

2.26 eV

Transparency Range

7-12 μm

Transmission Efficiency

60% (7-12 μm)

Refractive Index

n (λ=10.6 μm) = 2.7

Electro-Optic Coefficient

y41 = 4.0 pm/V

Electrical Resistivity

Low: <10³ Ω·cm, High: >10⁹ Ω·cm

Optical, Laser and Nonlinear Optical Properties

Wavelength (λ)

Refractive Index (n)

Transparency (%)

Electro-Optic Efficiency

7 μm

2.8

60%

High

10.6 μm

2.7

55%

High

12 μm

2.6

50%

Moderate

Standard Fabrication Specifications

Specification

Parameter

Aperture Size

Up to 30 × 30 mm

Minimum Thickness

0.01 mm

Crystal Orientation

[100] or [111]

Surface Flatness

<λ/10

Surface Roughness

Ra < 0.01 nm

Coating Specification:

 

  • ZnTe Crystals are typically delivered uncoated to preserve their surface integrity. Anti-reflective coatings are available upon request depending on application-specific requirements.
  • Adhesion Test Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.

POC Strength and Capabilities

 

Photonics On Crystals (POC) excels in delivering high-quality ZnTe crystals tailored for THz applications. With advanced manufacturing processes and precision control, POC provides large-aperture crystals with minimal defect density, ensuring high performance across optical and electronic applications. POC also specializes in custom fabrication and electro-optic crystal bonding for enhanced utility.

Standard Products

Clear Aperture

Thickness

Orientation

Coating

Price (USD)

Customization Available

30 × 30 mm

0.5 mm

[100]

Uncoated

$2,500

Yes

20 × 20 mm

1.0 mm

[111]

Uncoated

$2,000

Yes

15 × 15 mm

2.0 mm

[100]

Uncoated

$1,500

Yes

POC-OC-122511-ZnTe Crystal

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