Perhaps the most distinguishing characteristic of Arrowhead Springs is the inverted arrowhead pattern on the hillside behind the hotel, pointing in the direction of the natural hot springs below.

Imec researchers managed to produce nanoridge lasers across an entire 300-mm wafer. The inverted-arrowhead shape at the bottom of the nanoridges traps crystal defect that would otherwise prevent ...

Figure 1: Device structure and energy levels of the inverted-type PSCs. Figure 2: Device performances of the inverted structure (ITO/PFN interlayer/active layer/MoO 3 (10 nm)/Al) PTB7:PC 71 BM ...