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In this work, we theoretically designed a new class of fullerene derivatives, metallofullerene heterodimers, through cross dimerization of metallofullerene monomers Li@C60, Y@C82 and Y2@C80. The molecular structures, electronic structures, linear and nonlinear optical properties of the heterodimers were studied by using density functional theory calculations. We found that two fullerene cages are connected through a relatively weak carbon-carbon single bond. Inter-cage electron transfer takes place in the heterodimers because of the different electron accepting ability of the metallofullerene moieties. The first hyperpolarizability of the metallofullerenes increases remarkably as a result of dimerization. Time-dependent density functional theory calculations reveal that the enhanced first hyperpolarizability of the dimer is associated with charge transfer transitions. This study demonstrates that covalent dimerization is an efficient way to improve the nonlinear optical response of metallofullerenes.
This article was published in the following journal.
Name: Chemphyschem : a European journal of chemical physics and physical chemistry
Few-layer molybdenum disulfide (MoS) has an electronic band structure that is dependent on the number of layers and, therefore, is a very promising material for an array of optoelectronic, photonic, a...
The nonlinear holography technique is a powerful tool for all-optical switching and manipulation of an arbitrary harmonic wave. The common method of realizing such nonlinear holography is by configuri...
Efficient nonlinear optical frequency mixing in small volumes is key for future on-chip photonic devices. However, the generally low conversion efficiency severely limits miniaturization to nanoscale ...
The results on optical studies of LiKBO-AgO and LiKBO-AgO-GdO glasses containing Ag nanoparticles formed during annealing in vacuum and air are presented. Strong bands that appear in optical transmiss...
We show that a nonlinear optical response associated with a resonant, atomically thin material can be dramatically enhanced by placing it in front of a partially reflecting mirror, rendering otherwise...
For this study the investigators are looking to do the following: 1. To characterize human lung lesions by nonlinear microscopy using ex vivo tissues. 2. To establish the first spect...
This research is studying a new investigative imaging instrument called a nonlinear microscope (NLM). A nonlinear microscope can produce images similar to an ordinary pathologist's microsc...
Evaluate the ability to image oral mucosa in healthy volunteer by nonlinear microscopy
The Skill Acquisition Methods underpinning Pedagogy for LEarning in Physical Education (SAMPLE-PE) project aims to investigate the influence of different pedagogical approaches to teaching...
Patients with lung nodules/mass found by CT (computed tomography) or PET (positron emission tomography) who agree to receive lung resection are arranged to test the dielectric property bef...
Microscopic imaging techniques that utilize nonlinear responses of light-matter interactions which occur with high-intensity illumination, such as from LASERS, and specialized light signal detection instrumentation to produce images without the need for dyes or fluorescent labels.
The use of light interaction (scattering, absorption, and fluorescence) with biological tissue to obtain morphologically based information. It includes measuring inherent tissue optical properties such as scattering, absorption, and autofluorescence; or optical properties of exogenous targeted fluorescent molecular probes such as those used in optical MOLECULAR IMAGING, or nontargeted optical CONTRAST AGENTS.
The study of systems which respond disproportionately (nonlinearly) to initial conditions or perturbing stimuli. Nonlinear systems may exhibit "chaos" which is classically characterized as sensitive dependence on initial conditions. Chaotic systems, while distinguished from more ordered periodic systems, are not random. When their behavior over time is appropriately displayed (in "phase space"), constraints are evident which are described by "strange attractors". Phase space representations of chaotic systems, or strange attractors, usually reveal fractal (FRACTALS) self-similarity across time scales. Natural, including biological, systems often display nonlinear dynamics and chaos.
Products or parts of products used to detect, manipulate, or analyze light, such as LENSES, refractors, mirrors, filters, prisms, and OPTICAL FIBERS.
The mechanical property of material that determines its resistance to force. HARDNESS TESTS measure this property.