Year: 2025
Type: article
Abstract: Cd2+‐doped potassium dihydrogen phosphate single crystals are prepared by “point seed” method. A significant disparity is identified in Cd concentrations between pyramidal and prismatic samples, with prismatic samples exhibiting higher levels. The ultraviolet–visible (UV–vis) spectra indicate that KDP crystals doped with trace Cd2+ exhibit increased transmittance, while those with excessive Cd2+ show reduced transmittance in the UV region. Additionally, excessive Cd2+ causes light absorption in the band ≈220 nm. Structural analysis is conducted utilizing infrared spectroscopy (IR). The results indicate that Cd2+ doping distorts the chemical bonding in KDP crystals and reduces their structural stability. A detailed analysis of the photoluminescence (PL) spectro copy results shows that Cd2+ in KDP crystals is related to increased defect concentration. The laser‐induced damage threshold (LIDT) results demonstrate that the LIDT of crystals decreases with increasing Cd2+ doping concentration. The Cd0‐Py sample demonstrates the highest LIDT value of 16.75 J cm−2 under the R‐on‐1 condition. The value of Cd1000‐Py sample decreases to 7.46 J cm−2 in the same mode, primarily attributable to the comparatively elevated concentration of micro defects. Differential incorporation of Cd2+ into pyramidal versus prismatic sectors is proposed, as substitutional and interstitial defects, accounts for the decrease of laser‐induced damage performance of KDP crystal based on the findings and prior reports.
Source: Crystal Research and Technology
DOI: 10.1002/crat.70021
Authors: Xiaoyang Dai, Shenglai Wang, Taixin Zhang, Guangqing Hu, Kaiyu Wang, Tianci Wu, Jiaao Lu, Xinyu Wei
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4414598352