Superluminal signaling by photonic tunneling

Photonic tunneling has found much theoretical and applied interest recently. Superluminal photonic pulse transmission and reflection have been presented at microwave and infrared frequencies. Presumably superluminal photonic and electronic devices can become reality soon. The author introduces new experimental and theoretical data on superluminal tunneling. Data of reflection by tunneling barriers have evidenced the nonlocal property of tunneling. An empirical relation was found for the photonic tunneling time independent of the system in question. The relation seems to be universal for all tunneling processes. The outstanding property of superluminal velocity can be applied to speed up photonic modulation and transmission as well as to improve micro electronic devices.