Strong optical nonlinearities in quantum wires and dots of porous silicon

Днепровский, В. С.; Eev, A.; Gushina, N.; Okorokov, D. K.; Panov, V. I.; Karavanskiĭ, V. A.; Maslov, A.P.; Соколов, В. В.; Dovidenko, E.

doi:10.1002/pssb.2221880127

Cited by 16 publications

(4 citation statements)

References 15 publications

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“…Of these, the two most commonly observed nonlinear effects are absorption saturation and transient bleach shift at high intensities 143–147. For instance, nonlinear absorption events have been observed for nanowires of GaAs148 and porous Si 149. These nonlinear optical properties have been considered potentially useful for optical limiting and switching applications 150.…”

Section: Optical Propertiesmentioning

confidence: 99%

Exciton Dynamics in Semiconductor Nanocrystals

2013

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This review article provides an overview of recent advances in the study and understanding of dynamics of excitons in semiconductor nanocrystals (NCs) or quantum dots (QDs). Emphasis is placed on the relationship between exciton dynamics and optical properties, both linear and nonlinear. We also focus on the unique aspects of exciton dynamics in semiconductor NCs as compared to those in bulk crystals. Various experimental techniques for probing exciton dynamics, particularly time-resolved laser methods, are reviewed. Relevant models and computational studies are also briefly presented. By comparing different materials systems, a unifying picture is proposed to account for the major dynamic features of excitons in semiconductor QDs. While the specific dynamic processes involved are material-dependent, key processes can be identified for all the materials that include electronic dephasing, intraband relaxation, trapping, and interband recombination of free and trapped charge carriers (electron and hole). Exciton dynamics play a critical role in the fundamental properties and functionalities of nanomaterials of interest for a variety of applications including optical detectors, solar energy conversion, lasers, and sensors. A better understanding of exciton dynamics in nanomaterials is thus important both fundamentally and technologically.

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Section: Optical Propertiesmentioning

confidence: 99%

Exciton Dynamics in Semiconductor Nanocrystals

2013

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“…The most commonly observed nonlinear effect in semiconductor nanoparticles is absorption saturation and transient bleach shift at high intensities [82,86,[99][100][101][102][103][104]. Similar nonlinear absorption have been observed for quantum wires of GaAs [105,106] and porous Si [107,108]. These non-linear optical properties have been considered potentially useful for optical limiting and switching applications [109].…”

Section: Non-linear Optical Absorption and Emissionmentioning

confidence: 76%

Optical and Dynamic Properties of Undoped and Doped Semiconductor Nanostructures

Grant¹,

Zhang²

2008

Annual Review of Nano Research

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This chapter provides an overview of some recent research activities on the study of optical and dynamic properties of semiconductor nanomaterials. The emphasis is on unique aspects of these properties in nanostructures as compared to bulk materials.Linear, including absorption and luminescence, and nonlinear optical as well as dynamic properties of semiconductor nanoparticles are discussed with focus on their dependence on particle size, shape, and surface characteristics. Both doped and undoped semiconductor nanomaterials are highlighted and contrasted to illustrate the use of doping to effectively alter and probe nanomaterial properties.Some emerging applications of optical nanomaterials are discussed towards the end of the chapter, including solar energy conversion, optical sensing of chemicals and biochemicals, solid state lighting, photocatalysis, and photoelectrochemistry.2

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“…The most commonly observed nonlinear effect in semiconductor nanoparticles is absorption saturation and transient bleach shift at high intensities [21,32,119,[240][241][242][243][244][245][246][247]. Similar nonlinear absorption have been observed for quantum wires of GaAs [248,249] and porous Si [250,251]. These nonlinear optical properties have been considered potentially useful for optical limiting and switching applications [252].…”

Section: Absorption Saturation and Harmonic Generationmentioning

confidence: 81%

Optical Properties of Semiconductor Nanomaterials

Zhang¹

2009

Optical Properties and Spectroscopy of Nanomaterials

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Strong optical nonlinearities in quantum wires and dots of porous silicon

Cited by 16 publications

References 15 publications

Exciton Dynamics in Semiconductor Nanocrystals

Exciton Dynamics in Semiconductor Nanocrystals

Optical and Dynamic Properties of Undoped and Doped Semiconductor Nanostructures

Optical Properties of Semiconductor Nanomaterials

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