Transverse spin and momentum in structured light: Quantum spin Hall effect and transverse optical force

I will give an overview of recent theoretical and experimental studies, which revisited fundamental dynamical properties of light: momentum and angular momentum. Recently, we described qualitatively new types of the spin and momentum in structured optical fields. These are: (i) The transverse spin angular momentum, which is orthogonal to the wave vector and is independent of the helicity and (ii) The anomalous transverse momentum, which depends on the helicity of light and exerts a weak optical force orthogonal to the wave vector. Both these quantities have attracted considerable attention and have been described and measured experimentally in various optical systems.