Mercury Gallium Sulfide Crystal

Data sheet

Density	4.95 g/cm3
Materials	HGS Crystal
Melting Piont	880 ℃
Molecular Formula	HgGa2S

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Mercury Gallium Sulfide (HGS) Crystal offers a high laser damage threshold and conversion efficiency, making it ideal for frequency doubling and OPO/OPA applications in the 1.0 to 10 µm range. For instance, a 4 mm HGS element achieves approximately 10% frequency doubling efficiency with CO2 laser radiation. Despite the challenges in growing large crystals, HGS competes with other nonlinear crystals like AgGaS2, AgGaSe2, ZnGeP2, and GaSe due to its high conversion efficiency and wide tuning range. Heeger Materials (HM) provides high-quality HGS crystals for advanced nonlinear frequency conversion.

Mercury Gallium Sulfide Crystal | HGS Crystal | HgGa2S

HGS Crystal Physical Structural Properties

Lattice Symmetry and Point Group	Tetragonal, S4
Space Group	S24
Melting Point (°C)	880
Density (g/cm³)	4.95

HGS Crystal Optical and Nonlinear Optical Properties

Optical Transmission Range (μm)	0.5 to 12.5
Energy Gap (eV)	2.84
Refractive Index (Measured Values)	λ (μm)	no	ne
	0.5495	2.6592	2.5979
	0.6500	2.5796	2.5264
	1.0760	2.4774	2.4324
	3.5400	2.4386	2.3979
	11.000	2.3690	2.3290
Damage Threshold	τ=10 ns, λ=1.06 μm (single pulse), 60 MW/cm²
	τ=18 ns, λ=1.064 μm, ν=10 Hz, 30 MW/cm²
Nonlinear Optical Coefficients	d₃₆(1.064μm)=1.8d₃₆(AgGaS₂)±15% = (35.2±5.3) pm/V
	d₃₁(1.064μm)=0.6d₃₆(AgGaS₂)±15% = (11.7±1.8) pm/V
	d₃₆ / d₃₁ = 3
	d₀₀ₑ = d₃₆sinθsin2φ + d₃₁sinθsin2φ, φopt=36°
	dₑ₀ₑ = d₀ₑₑ = d₃₆sin2θcos2φ - d₃₁sin2θcos2φ, φopt=81°
Dispersion Equations (Sellmeier Equations, λ in μm)	no² = 6.2081522 - 63.706298 / (225.0 - λ²) - 0.23698804 / (0.09568646 - λ²)
	ne² = 6.0090267 - 63.280659 / (225.0 - λ²) - 0.21489656 / (0.09214633 - λ²)
Experimental Results with HgGa₂S₄	Quantum conversion efficiency (%) for CO₂ lasers (τ=30 ns, power density 60 MW/cm², L=4 mm)

HGS Crystal Specifications

Clear Aperture Tolerance	+0.1/-0 mm
Thickness Tolerance	+0.1/-0 mm
Angle Tolerance (φ and θ)	+/-30 arcmin
Perpendicular Tolerance	15 arcmin
Aperture Chamfer	0.1~0.3 mm
Parallelism	<120 arcsec
Flatness	<λ/6 @ 633 nm
Axial	±0.5° @ all axes

HGS Crystal Stock Dimensions

Crystal Type	Size	θ	φ
HGS	5×5×1 mm	43.5°	45°
HGS	6×6×2 mm	55.8°	0°
HGS	8×8×1 mm	43.5°	45°

HGS Crystal Applications

Second-Harmonic Generation for CO and CO2 Lasers: Used as a frequency doubler for CO and CO2 lasers, enabling efficient second-harmonic generation.
Frequency Generation for Mid-Infrared Range: Applied in various frequency generation processes to reach the mid-infrared region.
Optical Parametric Oscillators (OPO): Utilized in optical parametric oscillators for generating tunable wavelengths in the mid-infrared range.
Frequency Mixing in the Mid-Infrared Range: Used for frequency mixing to generate new wavelengths in the mid-infrared region.

HGS Crystal Packing And Shipping

Mercury Gallium Sulfide (HGS) Crystal will be securely packaged in sturdy containers with cushioning materials to prevent movement or damage during shipping. This careful packaging ensures that the product arrives in perfect condition, maintaining its high-quality standards throughout the delivery process.

Where to Buy Mercury Gallium Sulfide (HGS) Crystal in Bulk?

Heeger Materials Inc., a professional supplier and manufacturer of high-quality Nonlinear Crystals products including Mercury Gallium Sulfide (HGS) Crystal, leverages extensive expertise in supply and export to offer competitive prices. We provide customized solutions to meet specific requirements, ensuring exceptional quality and customer satisfaction.

Heeger Materials Inc. was established in 2016 in Colorado, USA. We specialize in premium-grade metals, alloys, ceramics, powders, and other materials catering to research, development, and large-scale industrial production in scientific and industrial sectors.

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