Miniaturized X-ray Generation by Pyroelectric Effect using Short Pulse Laser

摘要

Ferroelectric crystals such as LiNbO3 (LN) and LiTaO3 (LT) are currently used as infrared sensors, electro-optical devices, nonlinear optical devices, X-ray generators, neutron generators, and tabletop nuclear fusion systems. We demonstrated fundamental measurements of pyroelectric current and surface charges accumulated by temperature change using ordinary heater, Pertier device and CO2 gas laser. Based on results, we shifted our target to surface potential caused by photogalvanic effect. We demonstrated photo-induced currents under a visible wavelength laser. The photogalvanic current was superior to the pyroelectric one under such conditions.