Mechanisms of the optical limiting effect in the fullerene-doped π-conjugated organic systems based on polyimide have been studied reverse saturable absorption, förster mechanism, complex formation, and photoinduced change in the refractive index have been established to be responsible for the limitation of the laser radiation. The existing technology with traditional bulk crystals has hit a technical limit to realize the envisioned optoelectronic applications, due to their relatively small nonlinear optical . Abstract a detailed study of several novel infrared optical limiting and switching devices using nematic liquid crystal films is presented the limiting and switching characteristics of the devices result from two different nonlinear optical processes, including thermally mediated transverse self -phase modulation and nonlinear interface switching near the total internal reflection state. Read quinoline-based azo derivative assembly: optical limiting property and enhancement mechanism, dyes and pigments on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Ty - gen t1 - femtosecond to nanosecond characterization of optical limiting mechanisms in power limiting liquids and solids au - malko,a au - xu,s. Superior optical limiting (ol) characteristics and mechanisms are explored in a novel nanocomposite made from graphene oxide (go) and nayf 4:yb 3+ /er 3+ nanoparticles via covalent chemical bonding. Optical limiting (ol) mechanisms of hexagonal prism-shaped metal cluster compounds w 2 ag 4 s 8 (dppy) 4 , mo 2.
Investigation of an optical limiting mechanism in multiwalled carbon nanotubes xuan sun, yuenan xiong, ping chen, jianyi lin, wei ji, jin hong lim, sidney s yang, david j hagan, and eric w van stryland we report our investigation of the mechanism that is responsible for the optical limiting . Abstract we report on optical limiting mechanisms in c60/toluene solutions over a wide range of laser fluences nonlinear absorption in c60 can be modeled by reverse saturable absorption. The pennsylvania state university the graduate school department of electrical engineering nonlinear liquids and mechanisms for all-time-scale optical limiting effects.
Employing conventional ois mechanisms, which shift the lens barrel on the two axes that are perpendicular to the optical axis, compromise the height of the camera and limit its performance our ois actuator overcomes the above limitations by splitting the ois functionality between the prism and the lens assembly. Mechanism studies on the superior optical limiting observed in graphene oxide covalently functionalized with upconversion nayf4:yb3+/er3+ nanoparticles. For optimum optical limiting performance, certain parameters need to be maximized the ratio of the excited state absorption to the ground state, ï ³ 2 /ï ³ 1 , ï ³ 4 /ï ³ 1 should be large to minimize the transmission of the limiter at high incident intensity. Principles of microscopy brightfield microscopy the microscope that is available to you for general use in this laboratory is a sophisticated optical instrument that can provide you with high-resolution images of a variety of specimens. Polyfluorenylacetylene for near-infrared laser protection: polymer synthesis, optical limiting mechanism and relationship between molecular structure and properties.
Dtic ada307464: nanosecond and subnanosecond investigations of intrinsic optical limiting mechanisms in photorefractive and semiconducting materials. We have investigated the nonlinear optical mechanisms responsible for optical limiting of both picosecond and nanosecond 532-nm optical pulses in the organometallic compound cyclopentadienyliron carbonyl tetramer (king's complex). We review nonlinear optical processes in various materials which can be utilized in passive optical limiting devices specifically, the mechanisms of reverse saturable absorption, two-photon and . By using photoacoustic z-scan, a unique tool developed to determine the nonlinear optical limiting mechanism in materials, it is found that the optical limiting exhibited by tis 2 2d sheets and graphene are mainly due to nonlinear absorption rather than scattering effects these results have opened the door for 2d-dichalcogenide-materials-based .
The effect of photoinduced electron transfer with formation of a radical-ion pair on the characteristics of optical limiting of laser radiation in specially prepared multi-component fullerene solutions is studied. 229 processing and application of ceramics 5  (2011) 229–231 mechanisms of optical limiting in a coanp solution contaning fullerenes c 70: applicability for the optoelectronics devices. The optical limiting effect induced by gold clusters was measured as a function of excitation wavelength the limiting effect is most efficient below 530 nm, and decreases towards the red.