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Temperature dependent linewidth rebroadening in quantum dot semiconductor lasers
摘要： We experimentally and analytically investigate the influence of temperature on the linewidth of an InP quantum dot (QD) laser. The full width half maximum (FWHM) of the peak in the optical spectrum strongly depends on the pump current and rebroadens at high injection levels. We show that with increasing temperature these effects are amplified. Applying a QD laser model including the excited (ES) and ground state (GS) with detailed balance scattering rates, we are capable of reproducing the experimentally observed data qualitatively and thus show that a relatively simple QD-laser model is capable of capturing this complex behavior. Additionally, we include a temperature dependent energy band gap reduction needed to fit the data and show that this effect enhances the rebroadening effect for higher temperatures.
关键词： Solid State Physics,Linewidth,Quantum Dot Lasers
更新于2025-09-19 17:13:59
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High-Energy-Density Physics and Laser Technologies
摘要： This paper is devoted to the jubilee of I.M. Khalatnikov, the founder and the first director of the Landau Institute for Theoretical Physics of the Russian Academy of Sciences. I.M. Khalatnikov organized a first-class institute the studies at which cover a broad spectrum of research directions. The plasma and lasers department of the Institute conducts research on plasma physics problems, laser–matter interaction, questions pertaining to laser applications, and hydrodynamics problems. Much attention is given to solid-state physics with an emphasis on the behavior of matter in extreme conditions under intense laser irradiation. A number of new results are presented: the behavior of metals in two-temperature states (when the temperature of the electron subsystem of a metal is much greater than the temperature of the ion subsystem due to ultrafast laser heating); determining the boundaries of existence of a single-wave propagation mode of elastoplastic shock waves in ductile metal crystals; the formation of a laser torch from target materials and liquids under metal laser ablation of a metal into the surrounding liquid; the physical–mechanical consequences (melting, capillarity, recrystallization) of nonuniform (along the irradiated surface) energy dissipation caused by the interference of plasmon–polariton and laser electromagnetic fields.
关键词： laser–matter interaction,plasma physics,laser ablation,hydrodynamics,two-temperature states,plasmon–polariton,solid-state physics,high-energy-density physics,laser technologies,elastoplastic shock waves
更新于2025-09-12 10:27:22
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[Springer Series in Materials Science] Introduction to Isotopic Materials Science Volume 248 || Energy Band Structure
摘要： Optical probing and manipulation of electron quantum states in isotope-mixed compounds at the nanoscale are key to developing future nanophotonic devices, which are capable of ultrafast and low-power operation. Before beginning a general discussion on the application of isotopic materials science, it is helpful to have the knowledge of the electronic band structure used in materials. The modern view of solid-state physics is based on the presentation of elementary excitations having mass, quasi-impulse, and electrical charge. The base of such view of solid is ideal gas, which described the behavior of the system, e.g., noninteracting electrons. Such an approach to model of elementary excitations as a suitable model for the application of the quantum mechanics for the solution of solid-state physics task. In this chapter, some peculiarities of isotopic materials science will be considered by taking into account the dependence of the properties of elementary excitations on the isotope effect. It is illustrated when the dimensions of a solid are reduced to the size of the characteristic length of electrons in the isotope-mixed materials (de Broglie wavelength, localization length), new physical properties due to quantum effects become apparent. Our intention has been to physics of low-dimensional isotope-based compounds and quantum devices would built up to the treatment of those new electronic, transport and optical properties.
关键词： nanophotonic devices,isotope effect,electronic band structure,solid-state physics,quantum effects,isotope-mixed compounds,quantum mechanics
更新于2025-09-09 09:28:46