Random Lasers for Broadband Directional Emission

Abstract

Broadband coherent light sources are becoming increasingly important for sensing and spectroscopic applications, especially in the mid-infrared and terahertz (THz) spectral regions, where the unique absorption characteristics of a whole host of molecules are located. The desire to miniaturize such light emitters has recently lead to spectacular advances with compact on-chip lasers that cover both of these spectral regions. The long wavelength and the small size of the sources result in a strongly diverging laser beam that is difficult to focus on the target that one aims to perform spectroscopy with. Here, we introduce an unconventional solution to this vexing problem relying on a random laser to produce coherent broadband THz radiation as well as an almost diffraction limited far-field emission profile. Our random lasers do not require any fine-tuning and thus constitute a promising example of practical device applications for random lasing.

arXiv comment12 pages, 8 figures

References in corpus (7)

• Optical frequency comb generation from a monolithic microresonator
• Mid-infrared frequency combs
• Speckle-free laser imaging
• Octave-spanning semiconductor laser
• Pump-Controlled Directional Light Emission from Random Lasers
• Mode Repulsion and Mode Coupling in Random Lasers
• Scalable numerical approach for the steady-state ab initio laser theory

Cited by in corpus (16)

• Light fields in complex media: mesoscopic scattering meets wave control
• Complex Lasers with Controllable Coherence
• Non-Hermitian disorder in two-dimensional optical lattices
• Anderson transition in three-dimensional systems with non-Hermitian disorder
• Wave propagation through disordered media without backscattering and intensity variations
• Electrically driven random lasing from a modified Fabry-Perot laser diode
• Spectral rigidity of non-Hermitian symmetric random matrices near Anderson transition
• All-Optical Adaptive Control of Quantum Cascade Random Lasers
• An antipodal Vivaldi antenna for improved far-field properties and polarization manipulation of broadband terahertz quantum cascade lasers
• Broadband monolithic extractor for metal-metal waveguide based terahertz quantum cascade laser frequency combs
• Directing random lasing emission using cavity exciton-polaritons
• Localization of Lindbladian Fermions
• Diffusive to quasi-ballistic random laser: incoherent and coherent models
• Spectrally resolved far-fields of terahertz quantum cascade lasers
• Non-resonant lasing in a deep-hole scattering cavity
• Correspondence between non-Hermitian topology and directional amplification in the presence of disorder