Bismuth Germanate (BGO, Bi12GeO20) Single Crystal Wafers

BGO Single Crystal (Bismuth Germanate, Bi12GeO20) Wafers

Product Overview
BGO (Bi12GeO20) is a sillenite-type electro-optic and photorefractive single crystal widely used in photonics, holography, optical information processing, and high-energy radiation detection. This cubic crystal exhibits strong photorefractive and nonlinear optical properties, high refractive index, and excellent chemical and mechanical stability. With high density and good radiation response characteristics, BGO crystals are suitable for advanced optical research, electro-optic devices, and high-energy physics applications.

Crystal Properties

Chemical Formula: Bi12GeO20
Crystal Structure: Cubic (Sillenite)
Growth Method: Czochralski (CZ)
Standard Orientation: [100]
Lattice Constant: 10.1455 Angstrom
Density: 9.2 g/cm^3
Melting Point: 925 °C
Thermal Expansion Coefficient: 7.15 × 10^-6 /°C
Hardness (Mohs): 5

Optical & Scintillation Properties

Refractive Index: n = 2.098
Peak Emission Wavelength: 480 nm
Energy Resolution (@662 keV): ~12%
Decay Time: ~300 ns
Radiation Length: 1.118 cm
Radiation Resistance: up to 10^7 rad
Neutron Capture Cross Section (thermal): 1.47
Relative Light Output: 15–20% of NaI(Tl)

Key Features

High refractive index and optical uniformity
Strong photorefractive and electro-optic response
High density and radiation detection capability
Stable physical and chemical properties
Non-hygroscopic and easy to handle
Good machinability and polishing performance
Suitable for precision optical and radiation detection applications

Typical Applications

Holographic storage and interferometry
Electro-optic modulation and optical switching
Optical information processing
Spatial light modulators
High-energy physics experiments
Gamma-ray and radiation detection
Medical imaging and nuclear instrumentation
Non-destructive testing
Laser and photonics research

Available Forms

BGO crystal substrates
Optical-grade polished wafers
Detector-grade crystal blocks
Custom-cut BGO components

Customization

Custom sizes and orientations available
Precision polishing and double-side polish available
Detector-grade and optical-grade options
OEM and research customization supported

Packaging

Cleanroom packaging
Vacuum-sealed protective packing
Individual crystal box packaging for safe transport