摘要
采用光学浮区法制备了不同Cr^(3+)掺杂浓度的Cr∶Al_(2)O_(3)晶体,并根据需要制备了不同直径(2 mm至13 mm)的长度大于100 mm的圆柱状Cr∶Al_(2)O_(3)晶体。测量了在制备Cr∶Al_(2)O_(3)晶体不同阶段所获得的粉末料棒、陶瓷料棒和晶体的密度,分别为0.928、2.230和4.051 g/cm 3。XRD图谱显示,Cr∶Al_(2)O_(3)晶体为α-Al_(2)O_(3)相。透射光谱表明,Cr∶Al_(2)O_(3)晶体可见光非特征吸收波段透过率大于80%。吸收光谱和光致激发光谱(监测669 nm光)均显示,Cr∶Al_(2)O_(3)晶体在418及559 nm处有较强吸收带,分别对应Cr^(3+)从^(4)A_(2)至4 T 1和从^(4)A_(2)至^(4)T_(2)的跃迁。以波长为559 nm的光激发Cr∶Al_(2)O_(3)晶体,其光致发射谱在669 nm处出现较强的发射峰;当Cr^(3+)浓度较低时,发射峰强度随Cr^(3+)浓度的增加而增强,Cr_(0.0060)Al_(1.9940)O_(3)的发射强度达到最大,然后随Cr^(3+)浓度增加而降低。
Cr∶Al_(2)O_(3)crystals with different Cr^(3+)concentrations were prepared by optical floating zone method,and cylindrical Cr∶Al_(2)O_(3)crystals with different diameters(2 mm to 13 mm)and lengths greater than 100 mm were prepared.The densities of powder rods,ceramic rods and crystals obtained at different stages of Cr∶Al_(2)O_(3)crystal preparation are measured to be 0.928,2.230 and 4.051 g/cm 3,respectively.XRD patterns show that Cr∶Al_(2)O_(3)crystal isα-Al_(2)O_(3)phase.The transmission spectra show that the transmittance of Cr∶Al_(2)O_(3)crystal in visible light non-characteristic absorption band is more than 80%.The absorption spectra and photoluminescence excitation(PLE)spectra(monitoring 669 nm light)show that there are strong absorption bands at 418 and 559 nm,corresponding to the transitions of Cr^(3+)from^(4)A_(2)to 4 T 1 and from^(4)A_(2)to^(4)T_(2),respectively.Under the excitation of light with a wavelength of 559 nm,the photoluminescence(PL)spectra of Cr∶Al_(2)O_(3)crystals show a strong emission peak at 669 nm.At low Cr^(3+)concentration,the intensities of the peaks increase with Cr^(3+)concentration increasing,and reach the maximum value in Cr_(0.0060)Al_(1.9940)O_(3)crystal,and then decrease with the increase of Cr^(3+)concentration.
作者
陶争
伍志业
娄佳明
王威廉
张宇欣
邓勇
邓文
TAO Zheng;WU Zhiye;LOU Jiaming;WANG Weilian;ZHANG Yuxin;DENG Yong;DENG Wen(School of Physical Science and Technology,Guangxi University,Nanning 530004,China)
出处
《人工晶体学报》
CAS
北大核心
2023年第7期1364-1370,共7页
Journal of Synthetic Crystals
基金
大学生创新项目(202110593080)
国家自然科学基金(12175047)。
关键词
Cr∶Al_(2)O_(3)
光学浮区法
光学性能
透射光谱
吸收光谱
光致激发光谱
光致发射光谱
Cr∶Al_(2)O_(3)
optical floating zone method
optical property
transmission spectrum
absorption spectrum
photoluminescence excitation spectrum
photoluminescence spectrum
