Omni-resonant space–time wave packets

Abstract

We describe theoretically and verify experimentally a novel class of diffraction-free pulsed optical beams that are 'omni-resonant': they have the remarkable property of transmission through planar Fabry-Pérot resonators without spectral filtering even if their bandwidth far exceeds the cavity resonant linewidth. Ultrashort wave packets endowed with a specific spatio-temporal structure couple to a single resonant mode independently of its linewidth. We confirm that such 'space-time' omni-resonant wave packets retain their bandwidth (1.6 nm), spatio-temporal profile (1.3-ps pulse width, 4-µm beam width), and diffraction-free behavior upon transmission through cavities with resonant linewidths of 0.3-nm and 0.15-nm. arXiv:1912.00092v1 [physics.optics]

Canceling and inverting normal and anomalous group-velocity dispersion using space-time wave packets

“…These propagation-invariant wave packets feature a unique set of characteristics including tunable group velocities in absence of chromatic dispersion [35][36][37][38], selfhealing [39], anomalous refraction [40][41][42][43][44], and novel ST Talbot effects [45]. The central characteristics of ST wave packets in free space are now well-understood [34,46], and potential applications are being evaluated in optical communications [47,48] and device physics [49][50][51][52][53][54][55].…”

Broadband Omni-resonant Coherent Perfect Absorption in Graphene

“…In addition to omni-resonance, a similar conception of classical entanglement has been instrumental in developing a new class of propagation-invariant pulsed beams of wave packets that we have coined the name 'space-time' (ST) wave packets [67][68][69][70]. Moreover, we have recently established the connection between omni-resonance and ST wave packets and have demonstrated that a family of such pulsed beams are omniresonant and can thus traverse planar FP cavities without change even when the pulse bandwidth exceeds the cavity resonant linewidth [52,53].…”

“…The key to harnessing the resonantly enhanced optical absorption associated with CPA over a broad, continuous bandwidth -rather than only at discrete resonant wavelengths -is the notion of omniresonance [49][50][51][52][53], which is illustrated in Fig. 1.…”

A universal angular-dispersion synthesizer

“…Access to this broad span of structured pulsed fields with precisely tailored dispersion profiles can help improve nonlinear interactions with materials or structures in the vicinity of their resonances where the refractive index changes rapidly. Furthermore, such sculpted fields will benefit investigations of novel guided pulsed modes [66,67], and omni-resonant interactions with planar cavities [68,69].…”