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Optics & Crystals PROVIDED BY SKP

Crystalline Mirror

We offer ultrahigh performance single-crystal optical coatings and novel manufacturing processes including adhesive-free direct bonding services that are tailored to meet (and ideally exceed) your unique requirements. Our expertise in optical system design and advanced microfabrication techniques enables you to achieve unprecedented levels of performance to meet your demanding specifications. With our substrate transfer and direct bonding processes we manufacture discrete optics and optical subassemblies with unprecedented levels of performance. The result: Semiconductor Supermirrors: The absolute highest quality coating on an optimized substrate.

● xtal stable

Item xtal stable
Center wavelength 900nm
Optical absorption <1ppm
Optical scatter >5ppm
Radious of curvature 10Cm
Reflectivity Typically >99.99%, >99.999% achievable
Loss angle <4 × 10⁻⁵ at 300 K, <5 × 10⁻⁶ at 10 K
Coating material Single-crystal GaAs/AlGaAs
Coating surface quality 1 Å RMS micro-roughness
Substrate material Typically fused silica, other materials available
Substrate diameter 0.5 - 1 inch (12.7 - 25.4 mm), other sizes available
Surface flatness <0.10 wave P-V measured @ 633 nm
Durability Similar to fused silica, cleaning instructions provided on request

● xtal mir

Item xtal mir
Center wavelength 2um
Optical losses < 40 ppm (scatter + absorption)
Bandwidth 200 nm FWHM
Optical transmission Tunable, per customer request
Coating material Single-crystal GaAs/AlGaAs
Substrate material Typically single-crystal silicon, other materials possible
Substrate diameter 0.5 - 1 inch (12.7 - 25.4 mm), other sizes available
Radius of curvature (ROC) >0.1 m
Surface quality <5 Å RMS micro-roughness
Surface flatness <0.10 wave P-V measured @ 633 nm
Durability Similar to fused silica, cleaning instructions provided on request

● xtal therm

Item xtal therm
Center wavelength 90nm~5000nm
Optical losses < 5 ppm (scatter + absorption)
Coating thermal conductivity > 30 W / (m·K)
Optical transmission Tunable, per customer request
Coating material Single-crystal GaAs/AlGaAs
Substrate material Diamond, SiC, or other materials possible
Coating area 200 mm diameter maximum, custom geometries possible
Surface flatness <0.10 wave P-V measured @ 633 nm
Radius of curvature (ROC) >0.1 m
Surface quality <5 Å RMS micro-roughness, surface overcoat optional
S2 surface AR coated for transmissive optics, super-polished, rough-cut, or metal coatings also available
Durability Similar to fused silica, cleaning instructions provided on request

● xtal custom - Fully customized solutions for direct-bonded components

>> Example applications made possible or improved by direct bonding:
● Semiconductor active regions on SiC and diamond for thermally-optimized saturable absorbers and high-power emitters
● Electrically-conductive interface layers between single-crystal semiconductors
● Laser disks directly bonded to polished heat sink materials
● Buried dielectric layers between single-crystal materials and thin films
● Integration of non-lattice-matched semiconductor heterostructures
● Semiconductor films on “soft” materials
● Joining dielectric and semiconductor layers for silicon and integrated photonics
● Simplify manufacturing by eliminating film stress

Item xtal custom
Example material Fused silica, Sapphire, Ti:Sapphire, GaAs, SiC, Diamond, YAG, YVO4, ete.
Size <5mm ~ 200mm
Thickness >1um ~ 30mm
Radious of curvature 10Cm
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