(INVITED)Magneto-optical performance of (LuTb)3Al5O12 single crystal by SSCG method

• Published in: Optical materials. X 2022-01, Vol.13, p.100139, Article 100139
• Main Authors: Ikesue, Akio, Aung, Yan Lin
• Format: Article
• Language: English
• ISSN: 2590-1478; 2590-1478
• DOI: 10.1016/j.omx.2022.100139

High quality LuTAG [(Lu0.1Tb0.9)3Al5O12] single crystal was successfully synthesized by SSCG (Solid State Crystal Growth) method using YAG (Y3Al5O12) seed crystals for the first time. The growth rate of the LuTAG single crystal is > 2 mm/h, and residual pores and birefringence cannot be detected inside the material. At a wavelength of 633 nm, a sample with a thickness of 7 mm has an inline transmittance of 81.5%, an optical loss of 0.06%/cm, and an extinction ratio of >35 dB, hence the optical quality is particularly excellent. The Verdet constant of this material at 1064 nm was 51 rad T−1m−1, which was 1.4 times that of the commercially available TGG (Tb3Ga5O12) single crystal. •SSCG method enabled to produce an optical grade (LuTb)3Al5O12 single crystal with very low dislocation density (3–4/cm2).•Verdet constant of the LuTAG single crystal (51 rad T−1m−1) at 1064 nm is 1.44 times that of the commercial TGG crystal.•Low insertion loss (0.06%/cm) and high extinction ratio (>35 dB) were also obtained suggesting for practical applications.