Nonlinear optical switching and optical limiting in colloidal CdSe quantum dots investigated by nanosecond Z-scan measurement

Valligatla, Sreeramulu; Haldar, Krishna Kanta; Patra, Amitava; Desai, Nisarg

doi:10.1016/j.optlastec.2016.05.009

Cited by 84 publications

(35 citation statements)

References 35 publications

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“…When the incident intensity increases, the peak-vally difference also increases but from the data presented in Table 1, it is evident that the NLR index decrease. The same sort of behavior was also reported by Valigatela [38] and Zhang [39]. It is also interesting to note that the thermal nonlinear reflective index (n ଶ ) decrease about 137% and 299% at λ = 405 nm and λ = 532 nm, respectively.…”

Section: Resultssupporting

confidence: 84%

Wavelength-dependent nonlinear optical properties of 8-(4-methoxyphenyl)-6-oxo-3-p-tolyl-6H-pyrido[1,2-b][1,2,4]triazine-7,9-dicarbonitrile

et al. 2018

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In this study, 8-(4-methoxyphenyl)-6-oxo-3-p-tolyl-6H-pyrido[1,2-b][1,2,4]triazine-7,9-dicarbonitrile (A) was prepared and then the nonlinear optical properties of this compound, including nonlinear refractive index (n2) and nonlinear absorption coefficient (β) were measured using Z-scan technique by continuous wave laser diode at wavelengths of 405 and 532 nm. At wavelength of 532 nm, by increasing the incident intensity a switch over from saturable absorption (SA) to reverse saturable absorption (RSA) was observed. The results showed that the nonlinear optical properties of this compound depend on the wavelength. It was also observed that with decreasing incident intensity, the thermal nonlinear refractive coefficient increased accordingly, while its thermo-optic coefficient decreased. In addition, the third-order susceptibility of this compound in wavelength of 532 nm was obtained higher than 405 nm.

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Section: Resultssupporting

confidence: 84%

Wavelength-dependent nonlinear optical properties of 8-(4-methoxyphenyl)-6-oxo-3-p-tolyl-6H-pyrido[1,2-b][1,2,4]triazine-7,9-dicarbonitrile

et al. 2018

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“…34 Considering the 532 nm is in the resonant region of IDFBR, The SA behaviour is attributed to the ground state bleaching (GSB). 35 All nonlinear absorption curves of EH-IDTBR exhibit RSA in toluene solution ( Figure S3) while SA in the film, revealing molecular packing can significantly modulate the signal of NLO response. Moreover, the side chain great impact on intermolecular packing.…”

Section: Z-scan Experimentsmentioning

confidence: 98%

Highly broadband NLO response of acceptor–donor–acceptor materials with a planar conformation

Huang

Zhou

et al. 2021

Mater. Adv.

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“…It is well-known that the transitions between different electronic states in QD nanostructures can be optically excited by laser fields. In this context, studying nonlinear optical process, including RSA and saturable absorption (SA) have been pursued by several researchers 29 – 32 ; for example, the intensity-dependent nonlinear absorption and nonlinear refraction of QDs were experimentally investigated in Ref. 29 .…”

Section: Introductionmentioning

confidence: 99%

“…In this context, studying nonlinear optical process, including RSA and saturable absorption (SA) have been pursued by several researchers 29 – 32 ; for example, the intensity-dependent nonlinear absorption and nonlinear refraction of QDs were experimentally investigated in Ref. 29 . When two or more closely-spaced individual QDs- with significant interdot coupling- are combined, a quantum dot molecule (QDM) is formed by the tunneling interaction among QDs, in which an electron can pass through the potential barrier between quantum dots via the interdot tunneling 33 .…”

Section: Introductionmentioning

confidence: 99%

Tunneling-induced optical limiting in quantum dot molecules

Veisi

Kazemi

Mahmoudi

2020

Sci Rep

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We present a convenient way to obtain an optical power limiting behavior in a quantum dot molecule system, induced by an interdot tunneling. Also, the effect of system parameters on the limiting performance is investigated; interestingly, the tunneling rate can affect the limiting performance of the system so that the threshold of the limiting behavior can be a function of the input voltage, allowing the optimization of the limiting action. Furthermore, by investigating the absorption of the probe field, it is demonstrated that the optical limiting is due to a reverse saturable absorption mechanism; indeed, analytical results show that this mechanism is based on a cross-Kerr optical nonlinearity induced by the tunneling. Additionally, the limiting properties of the system are studied by using a Z-scan technique.

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Nonlinear optical switching and optical limiting in colloidal CdSe quantum dots investigated by nanosecond Z-scan measurement

Cited by 84 publications

References 35 publications

Wavelength-dependent nonlinear optical properties of 8-(4-methoxyphenyl)-6-oxo-3-p-tolyl-6H-pyrido[1,2-b][1,2,4]triazine-7,9-dicarbonitrile

Wavelength-dependent nonlinear optical properties of 8-(4-methoxyphenyl)-6-oxo-3-p-tolyl-6H-pyrido[1,2-b][1,2,4]triazine-7,9-dicarbonitrile

Highly broadband NLO response of acceptor–donor–acceptor materials with a planar conformation

Tunneling-induced optical limiting in quantum dot molecules

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