Superluminal Tunneling Devices

Photonic tunneling permits superluminal group velocity. The principle of causality is not violated but the time duration between cause and effect can be shortened compared with an interaction exchange with velocity of light. This outstanding property can be applied to speed-up photonic modulation and transmission as well as to improve micro-electronic devices. Superluminal photonic pulse transmission has been presented at microwave and infrared frequencies already. Presumably superluminal photonic and electronic devices can become reality having in mind the experimental evidence of the universal tunneling time of photons and of electrons.