We proposed a switchable beam steering device with cycloidal diffractive waveplate (CDW) for eye tracking in a virtual reality (VR) or augmented reality (AR) display system. Such a CDW diffracts the incident circularly polarized light to the first order with over 95% efficiency. To convert the input linearly polarized light to right-handed or left-handed… (More)
We report a transient absorption study of photocarrier dynamics in transition metal dichalcogenide alloy, Mo 0.5 W 0.5 S 2. Photocarriers were injected by a 400-nm pump pulse and detected by a 660-nm probe pulse. We observed a fast energy relaxation process of about 0.7 ps. The photocarrier lifetime is in the range of 50-100 ps, which weakly depends on the… (More)
This case study discusses the advantage of using both lateral and protrusive mandibular excursive movements to improve the accuracy of the joint vibration analysis rather than relying only on opening and closing movements of the mandible for analysis.