Among currently available optical spectroscopic methods, Raman spectroscopy has
versatile application to investigation of dynamical processes of molecules leading to …

Ultrafast extreme ultraviolet (XUV) transient absorption is the process by which atoms and
molecules absorb light on a timescale faster than the lifetime of the states involved …

Air lasing from single ionized N 2+ molecules induced by laser filamentation in air has been
intensively investigated and the mechanisms responsible for lasing are currently highly …

Harnessing structured light is fascinating for its multidisciplinary applications, eg, in remote
driving microrobots, sensing, communications, and ultrahigh resolution imaging. Here, we …

Cavity-free lasing in atmospheric air has stimulated intense research toward a fundamental
understanding of underlying physical mechanisms. In this Letter, we identify a new …

Air lasing is a simple and promising technique to efficiently produce coherent light in the
atmosphere. Yet, its capability to obtain structured light like optical vortices or vector beams …

Nitrogen molecules pumped by intense femtosecond laser pulses give rise to coherent
emission in the forward direction at a series of wavelengths, coined “air lasing.” We …

In this paper a method is proposed for achieving spatially dependent amplification without
inversion (AWI) by exposing a quantum emitter to two weak probe beams carrying orbital …

We investigate the role of nuclear motion and strong-field-induced electronic couplings
during the double ionization of deuterated water using momentum-resolved coincidence …

Tunneling ionization, a fascinating quantum phenomenon, has played the key role in the
development of attosecond physics. Upon absorption of a few tens of photons, tunneling …