Between electronics and photonics there exists a frequency gap of approximately two octaves, i.e., the frequency range between 100 GHz and 10 THz, across which there are limited capabilities for signal generation, control, guidance, and processing. Researchers have demonstrated e that phonon-polaritons in ionic crystals like LiNbO3 or LiTaO3 may …

An outbreak of violence in the ongoing Israeli–Palestinian conflict commenced on 10 May 2021, though disturbances took place earlier, and continued until a ceasefire came into effect on 21 May. It was marked by protests and rioting, police riot control, rocket attacks on Israel by Hamas and Palestinian Islamic Jihad, …