C-cut
Thora Buckner
Isolated monolayer thickness MoS2 are grown onto c-cut (0001) sapphire substrates. This particular product contains monolayer thickness MoS2 triangular flakes randomly distributed across sapphire substrate. While some regions reach continuity with coalesced MoS2 triangles, this sample contains mostly separated triangles for advanced spectroscopy, microscopy, and electronic measurements. The triangle sizes show sample to sample variation. Synthesized monolayer MoS2 triangles are highly luminescent and Raman spectroscopy studies also confirm the monolayer thickness.
Growth method: Our company synthesizes these monolayers using chemical vapor deposition (CVD) using highest purity (6N) gases and precursors in semiconductor grade facilities to produce crystalline and large domain size samples (1-50um). This is unlike commonly used MOCVD process wherein defects are very very large and domain sizes are small (10nm-500nm). Our samples are always highly luminescent and highly crystallized
The demand for precise and high-quality machining of wide-bandgap materials, such as glasses and crystals, is of considerable significance in science and industry. Among these materials, sapphire stands out as an appealing choice due to its exceptional mechanical and optical attributes, high thermal conductivity and stability, low electrical conductivity, and resilience against harsh chemicals. Despite its hardness, sapphire is brittle, making it prone to cracking during conventional machining attempts. Recently alternative non-contact approaches, like laser ablation, have emerged as potential solutions to improve the machining quality. However research of laser processing of wide-bandgap materials, especially utilizing the high harmonics of femtosecond solid-state laser systems, remains incomplete. Our study focuses on investigating the nonthermal laser ablation of c-cut sapphire crystals using femtosecond (300 fs) deep UV (206 nm) laser pulses and comparing the results with traditional IR femtosecond ablation. The publication encompasses a comprehensive depiction of the ablation process and a review of the various achieved morphologies with accompanying scanning electron microscope images. Our findings indicate that efficient ablation with surface roughness below 100 nm can be achieved through a single-step process within specific laser processing parameter ranges. The ablation process of sapphire encompasses a strong incubation effect, hence the pulses need to be tightly overlapped. Additionally, we provide a detailed description of methodology used to extract surface roughness which was utilized in all the presented research and offers a practical framework for characterizing ablation results obtained from diverse laser systems.
C-CUTS:
When to use it: To control angle and depth in the crease and combined with other skating movements (t-push, shuffle and slide). Example: Coming out of the crease or backwards movement for a breakaway.
Drill 1 - Goaltenders positioned mid crease. 3 pucks positioned (1 on the left and right face-off dots and 1 mid-slot.). Goaltender will use rapid c-cuts moving forward to the edge of the circle and back to the middle of the net.
Drill 3 - Goaltender will start at the bottom of the circle in section 3 and c-cut from the bottom of the circle to the top ensuring that the Goaltender uses a single foot stop and compact stance both at the bottom and top of the circles. This drill will be executed 1 line forward and 1 line backward.