Nonlinear absorption, scattering and optical limiting studies of CdS nanoparticles

Abstract

The nonlinear optical absorption, scattering and optical limiting properties of CdS nanoparticles dispersed in dimethylformamide (DMF) are investigated. The nanoparticles are synthesized using the standard chemical synthesis method with thioglycerol as the capping agent. The investigations are carried out at 532 nm in the ns regime. Strong two-photon absorption and nonlinear scattering are found to be responsible for good optical limiting characteristics in these nanoparticles.

Microbe-mediated synthesis of antimicrobial semiconductor nanoparticles by marine bacteria

“…The microbial synthesis of nanoparticles had been recently recognized as a promising source of nanomaterials [9]. CdS has promising applications in technical fields such as photochemical catalysis, gas sensor, detectors for laser and infrared, solar cells, nonlinear optical materials and various luminescence devices [10][11][12][13]. CdS nanoparticle synthesis has been a modern growing field of research due to its important optical, physical and chemical properties.…”

Spectroscopic studies on Fe3+ doped CdS nanopowders prepared by simple coprecipitation method

“…Semiconductor nanoparticles or quantum dots (QDs) with typical dimensions of 1-100 nm have generated enormous attention in the past decades because their optical and electronic properties are dramatically different from those of the corresponding bulk crystals and also because of their wide applications in the fields of optoelectronic and biological technology [1][2][3][4][5][6][7]. Chalcogenide semiconductors such as cadmium sulfide is a well characterized II-VI group inorganic semiconductor with a wide direct band gap of 2.42 eV (bulk CdS) and a small exciton Bohr radius of 2.5 nm.…”

“…The nanoparticle radius is comparable to the Bohr exciton radius in the corresponding bulk material, leading to splitting of continuum of electronic energy levels into discrete states with the effective band gap energy blue shifted from that of the bulk. II-VI semiconductor nanostructures have been investigated widely and demonstrated potential application in solar cells [1], light emitting diodes [2], IR photodetectors [3], electrically driven lasers [4], optical limiters [5] biological fluorescent labels [6] and upconversion luminescent materials [7]. Semiconductor nanocrystals have been prepared either as powder or stable self standing nanocrystals by using different organic stabilizers to prevent them from aggregation by capping their surfaces.…”

Optical Limiter Based on a New Nonlinear Scattering Mechanism by Using Graphene in a Multilayer Optical Resonator

“…For this purpose, various materials such as organic molecules [1][2] and nanoparticles and nanomaterials [3][4][5][6] and various mechanism such as nonlinear absorption, nonlinear refraction and nonlinear scattering [7] have been used. Also recently, Graphene (Gr) as a new nonlinear material [8][9][10][11][12] with strong refractive and absorption nonlinearity has been attracted a great deal of attentions for designing new nonlinear devices.…”