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The fundamentals of synthesis of the nanomaterials, properties, and emphasis on laser ablation in liquids: a brief review. [PDF]
Discov NanoKrishna Podagatlapalli G.
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Single-exciton optical gain in semiconductor nanocrystals
Nature, 2007Nanocrystal quantum dots have favourable light-emitting properties. They show photoluminescence with high quantum yields, and their emission colours depend on the nanocrystal size--owing to the quantum-confinement effect--and are therefore tunable. However, nanocrystals are difficult to use in optical amplification and lasing.
John A. McGuire +6 more
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Three-section semiconductor optical amplifier for monitoring of optical gain
IEEE Photonics Technology Letters, 1992A 1.5- mu m multiquantum well amplifier divided into three sections with short contacts at the input and output facets is described. A simple derivation shows that the amplifier optical gain is proportional to the ratio of voltage changes at the facet contacts induced by the optical signal. Measurements of optical gain and contact voltage as a function
K.F. Brown-Goebeler +9 more
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Transient hot-carrier optical gain in a gain-switched semiconductor laser
Applied Physics Letters, 2013The transient optical gain was quantitatively determined from the rise time of output pulses of a gain-switched semiconductor laser via impulsive optical pumping. The optical gain for a high carrier density during gain switching was greatly reduced from that during steady-state operation because of hot carriers.
Changsu Kim +7 more
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Electrical Switching of Optical Gain in Perovskite Semiconductor Nanocrystals [PDF]
Nano Letters, 2021 Perovskite semiconductor nanocrystals are promising for optical amplification and laser applications benefiting from efficient optical gain generation. Nevertheless, the pump threshold is limited by more than one exciton per nanocrystal required to generate population inversion in neutral nanocrystals due to the level degeneracy.
Zhengyuan Qin +6 more
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Optical gain in semiconductors
Journal of Luminescence, 1973Abstract Direct measurements of optical gain in semiconductors give information on the stimulated recombination process that cannot be easily obtained from an oscillating semiconductor laser. The effects of various material parameters on the gain and saturation factors can be easily studied.
R.F. Leheny, K. L. Shaklee, R.E. Nahory
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Gain-enhanced optical coherence in a high optical gain semiconductor
Physics Letters A, 2012Abstract The propagation of ultrashort pulses in a traveling wave semiconductor amplifier is considered. It is demonstrated that the effective polarization relaxation time, which determines the coherence of the interaction of pulses within the medium, strongly depends on its optical gain.
Peter P. Vasilʼev +2 more
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Method for measuring the optical gain in semiconductors
Soviet Journal of Quantum Electronics, 1980It is shown that a widely used method for measuring the gain in semiconductors, based on the dependence of the radiation intensity on the length of the active region, is incorrect since it neglects the escape of radiation through the surface of the excited region into the passive part of the crystal.
Yurii M Popov +4 more
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