Nonlinear Optical Switching and Enhanced Nonlinear Optical ...
Nonlinear Optical Switching and Enhanced Nonlinear Optical Response of Au-CdSe Hetero-Nanostructures V. Sreeramulu1, Krishna Kanta Haldar2, Amitava Patra2*, D. Narayana Rao1* 1 2
School of Physics, University of Hyderabad, Gachibowli, Hyderabad-500046, India
Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India. Corresponding author: [email protected] and [email protected]
Degenerate fourwave mixing (DFWM) technique: The third order nonlinear optical susceptibility measurements of CdSe quantum dot and AuCdSe hetero-nanostructures were carried out using degenerate four wave mixing (DFWM) technique in a boxcar geometry using 532 nm, picosecond laser pulses. Figure S1 represents the geometry of the DFWM technique. More details about the DFWM technique is given in our article1, 2. Choice of low input powers allowed us to neglect the contribution of higher order nonlinearities.
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Figure S1: Geometry of the DFWM experiment. Beams 1-3 are coincident on the sample. The resultant fourth beam (dashed line) is the DFWM signal that occurs because of the in k 4 = k 3 − k 2 + k1 .
Figure S2: The open aperture nonlinear absorption curves for Chloroform (solvent) at different input intensities with 532 nm ps laser.
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Figure S3: The Z-scan open aperture traces for CdSe quantum dot and Au-CdSe flower shaped hetero-nanostructures at different intensities with 532 nm ps laser.
Figure S4: The closed aperture Z-scan traces for Chloroform (solvent) at different input intensities with 532 nm ps laser.
Figure S5: DFWM signal recorded for Au-CdSe tetrapod hetero-nanostructure as a function of input intensity with 532 nm ps laser pulses.
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Figure S6: The Z-scan open aperture traces for the solvent at different intensities with 800 nm fs laser pulses. References: (1) Srivastava, P. C.; Singh, V.; Dwivedi, S.; Pujan, T.; Bhuj, A. K.; Butcher, R. J.; Bala Murali Krishna, M.; Narayana Rao, D. Synthesis, crystal structure, supramolecular associations and thirdorder non-linear optical (NLO) properties of some organotellurium (IV) derivatives. Polyhedron 2012, 42, 36-42. (2) Srivastava, P. C.; Dwivedi, S.; Singh, V.; Pujan, T.; Bhuj, A. K.; Butcher, R. J.; Krishna, M. B. M.; Rao, D. N. Supramolecular assemblies of organotellurium(IV) dithiocarbamates and third order nonlinear optical susceptibility (χ(3)) of C4H7(CH3)Te[S2CN(C2H5)2]2. Inorganica Chimica Acta 2012, 388, 175-183.
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School of Physics, University of Hyderabad, Gachibowli, Hyderabad-500046, India
Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India. Corresponding author: [email protected] and [email protected]
Degenerate fourwave mixing (DFWM) technique: The third order nonlinear optical susceptibility measurements of CdSe quantum dot and AuCdSe hetero-nanostructures were carried out using degenerate four wave mixing (DFWM) technique in a boxcar geometry using 532 nm, picosecond laser pulses. Figure S1 represents the geometry of the DFWM technique. More details about the DFWM technique is given in our article1, 2. Choice of low input powers allowed us to neglect the contribution of higher order nonlinearities.
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Figure S1: Geometry of the DFWM experiment. Beams 1-3 are coincident on the sample. The resultant fourth beam (dashed line) is the DFWM signal that occurs because of the in k 4 = k 3 − k 2 + k1 .
Figure S2: The open aperture nonlinear absorption curves for Chloroform (solvent) at different input intensities with 532 nm ps laser.
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Figure S3: The Z-scan open aperture traces for CdSe quantum dot and Au-CdSe flower shaped hetero-nanostructures at different intensities with 532 nm ps laser.
Figure S4: The closed aperture Z-scan traces for Chloroform (solvent) at different input intensities with 532 nm ps laser.
Figure S5: DFWM signal recorded for Au-CdSe tetrapod hetero-nanostructure as a function of input intensity with 532 nm ps laser pulses.
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Figure S6: The Z-scan open aperture traces for the solvent at different intensities with 800 nm fs laser pulses. References: (1) Srivastava, P. C.; Singh, V.; Dwivedi, S.; Pujan, T.; Bhuj, A. K.; Butcher, R. J.; Bala Murali Krishna, M.; Narayana Rao, D. Synthesis, crystal structure, supramolecular associations and thirdorder non-linear optical (NLO) properties of some organotellurium (IV) derivatives. Polyhedron 2012, 42, 36-42. (2) Srivastava, P. C.; Dwivedi, S.; Singh, V.; Pujan, T.; Bhuj, A. K.; Butcher, R. J.; Krishna, M. B. M.; Rao, D. N. Supramolecular assemblies of organotellurium(IV) dithiocarbamates and third order nonlinear optical susceptibility (χ(3)) of C4H7(CH3)Te[S2CN(C2H5)2]2. Inorganica Chimica Acta 2012, 388, 175-183.
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