Second harmonic generation in nonlinear optical crystals formed from propellane-type molecules

Abstract

A member of the propellane family – a novel chiral compound DDDDP – that shows second harmonic generation in its crystalline form.

Avoiding the Center‐Symmetry Trap: Programmed Assembly of Dipolar Precursors into Porous, Crystalline Molecular Thin Films

“…From these molecular properties we then estimated the macroscopic second‐order susceptibilities ( χ IJK and d IJK ) of the crystalline SURMOF thin films. The highest susceptibility (for a fully aligned sample) amounts to d 25 = −0.057 pm V −1 , which is a factor of 25 lower than urea (1.4 pm V −1 ) [ 50 ] and an order of magnitude lower than that of second‐order NLO organic crystal of KDP. [ 50 ]…”

“…The highest susceptibility (for a fully aligned sample) amounts to d 25 = −0.057 pm V −1 , which is a factor of 25 lower than urea (1.4 pm V −1 ) [ 50 ] and an order of magnitude lower than that of second‐order NLO organic crystal of KDP. [ 50 ]…”

First-order hyperpolarizabilities of propellanes: elucidating structure–property relationships

“…4 Since then, several research groups have synthesized and studied the properties of different propellanes including heteropropellanes -where the ring structures are not necessarily hydrocarbons. [5][6][7][8][9][10][11] Apart from their strained geometry, propellanes are popular due to their diverse applications in synthetic chemistry ranging from materials to natural products. 5 It is important to note that although the research on propellanes started about 80 years ago, these systems are very common in natural products.…”

Effect of Polymerization on the Charge-Transfer Mechanism in the One (Two)-Photon Absorption Process of D–A-Type Triphenylamine Derivatives

“…New nonlinear optical (NLO) effects have been discovered successively, and research effects have also originated from the second order , to the third order and even higher . Nonlinear optics is of great significance to the development of modern laser technology, spectroscopy, and material structure analysis. , The current research hotspots of nonlinear optics include searching for new NLO materials and discussing their nonlinear processes (frequency doubling, sum frequency, differential frequency, and multiphoton absorption , ) to obtain lasers with different frequencies compared to the incident light, thus achieving the purpose of optical frequency transformation. Among various NLO materials (organic compounds, oxide crystals, semiconductor crystals, etc.…”