Experimental principle of electro-optic cavities (EOCs) measuring the multiple echoes of the THz light field (red) with a visible probe pulse (green) during a nonlinear interaction inside a ...

Physicists have found a clever way to detect the elusive Unruh effect without extreme accelerations. By using atoms that emit light cooperatively between mirrors, acceleration subtly shifts when a ...

Description: The image shows two nanoparticles (green) trapped by optical tweezers / laser beams (red) and placed in between two mirrors (white) which forms an optical cavity (periodic blue blobs).

Cavity-enhanced spectroscopy exploits multiple reflections of light between highly reflective mirrors to increase the effective path length through an atmospheric sample, thereby amplifying weak ...