Bismuth Silicon Oxide ( Bi12SiO20 )
Bismuth Germanium Oxide ( Bi12GeO20 )
Bismuth Titanyl Oxide ( Bi12TiO20 )


Single crystals with the Sillenite structure, Bi12MO20 (M=Si, Ge, Ti) have a fortunate combination of electrooptic, acoustooptic and piezoelectric properties and are thus promising materials for optoelectronics.

The fabrication of sillenite oxide thin-film structures by different techniques permits the development of a long list of devices, including integrated-optics devices.

The strong spectral dependence of the photoconductive properties of these crystals and their electrooptic properties makes it possible to develop a wide variety of devices including spatial light modulators, hologram recording devices, phase conjugation, photorefractive incoherent-to-coherent optical converters.

The relatively large electrooptic effect of sillenite oxide makes them useful also for optical fiber electric field sensors with high thermostability.


Material Properties:

Material

BSO

BGO

BTO

Chemical Formula

Bi12SiO20

Bi12GeO20

Bi12TiO20

Crystal Structure

Crystal System: cubic
Point Group: 23

Lattice Parameters,

10.104

10.145

10.175

Density, g/cm3

9.14

9.2

9.2

Mohs Hardness

6

5

5

Melting Point, C

884

925

840

Transparency Range, mm

0.4 - 6

0.4 - 7

0.5 - 6

Refractive Index at l = 0.63 mm

2.54

2.55

2.56

Electrooptical Coefficient r41, pm/V at l = 0.63 mm

5.0

3.5

5.7

Optical activity, deg/mm

at l = 0.5 mm
at l = 0.6 mm
at l = 0.63 mm
at l = 1.0 mm

 

42
25
-
7.5

 

41.5
24
-
-

 

-
-
6.3
2.0

Photoelastic coefficients at l = 0.63 mm

P11
P44

 

0.12
0.04

 

0.13
0.04

 

-
-

Elastic waves velocity, m/sec.

N

100
110

U

100
100

 

3830
1690

 

3650
1680

 

-
-

Dielectric Constant

56

40

46
Dark resistance, Ohm cm

~ 1014

~ 1014

~ 1014

 

Available sizes for polished elements are (3 - 20) x (3 - 20) x (3 - 20) mm3.
Other single crystals with Sillenite structure such as Bi12TiO20 (BTO) and doped Bi12SiO20 (BSO), Bi12GeO20 (BGO) are also available.

Please send us your exact requirements including dimensions, orientation, required dopant concentrations, polishing and coating requirements and quantity.

Most crystals are manufactured according to the customer specifications. However, based on regular requests we have now substantial amount of various crystals in stock. The following files contain information about different crystals available in stock.
Crystals in Stock 01 - Crystals in Stock02

OpticsLand, a presicion optics division of Del Mar Ventures, produces precision ultraviolet, visible and infrared optics from fused silica, crystal quartz, calcium fluoride, barium fluoride, magnesium fluoride, sapphire, germanium, calcite, glass and other materials. The product line includes lenses, windows, prisms, mirrors, polarizers, retarders, beamsplitters, filters, etalons etc. OpticsLand provides engineering and contract manufacturing of precision optical components and systems.

 

List of products

Worldwide Distributors

 

Del Mar Ventures
4119 Twilight Ridge
San Diego, CA 92130

tel (858) 755-6727
fax (858) 755-6771
v/efax (858) 630-2376

v/efax: (509) 752-0123
delmar@sciner.com
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