CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Xinxi Zeng,Lingling Wu,Xiaoqing Xi,Bo Li,Ji Zhou
Terahertz (THz) radiation produces complex and intriguing interactions with many of the magnetically ordered materials. We introduced a THz time-domain spectroscopy with a temperature control attachment to investigate thermally tunable terahertz magnetic responses of TbFeO 3 . Ferromagnetic (FM) resonances and antiferromagnetic (AFM) resonances were excited simultaneously at T = 3–290 K. The performance of temperature effect on resonances was assessed by their transmittance, resonant frequency shifts and a defined quality factor ( Q -factor, Q = ν 0 /Δ ν ). Transmittance, defined Q -factor and frequency shifts were introduced to assess the thermally tunable performances of terahertz magnetic responses. Overall increased transmittance, increased Q -factor and blue shifts were observed as temperature cools. This will be beneficial to the THz spectroscopic application in controlling responses of various materials.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Xin Wang,Jibo Yu,Haiyan Zhao,Xiaosong Lu,Wenhao Li,Ke Tian,Gilberto Brambilla,Pengfei Wang
In this letter, high Q factor microsphere resonators with excellent stability and high damage threshold are fabricated from Tm 3+ doped fluorosilicate glasses using the traditional melt-quenching and fiber heating techniques. Intense 1.88 μm photoluminescence and single mode laser emission are obtained under the excitation of an 808 nm laser. The Q factor of the microsphere resonator is measured to be as high as 1.4 × 10 6 . Models for photoluminescence and lasing are proposed using spectroscopic data from the absorption and emission spectra . The excellent resistance to humidity and temperature are characterized from the transmittance spectra under different environmental conditions. Differential thermal analysis (DTA), measured in four different glass samples proves the high damage threshold. The proposed glass microsphere resonator laser can find application in optical sensors and micro lasers, especially in complex environments.
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Huimin Yu,Xueqiong Su,Yong Pan,Dongwen Gao,Jin Wang,Ruixiang Chen,Junhe Zhang,Fei Dou,Xinping Zhang,Kun Ge,Xiaoyu Shi,Tianrui Zhai,Li Wang
The whispering gallery mode (WGM) microcavity has a high-quality factor and small mode volume, for the property of confining photons in a small volume for a long time, which enhances the light-matter interaction. Combining with quantum dots that act as gain medium, it can realize low-threshold and narrow-linewidth microlasers with excellent performance. However, achieving conventional whispering gallery mode lasers still requires complex preparation conditions. Here, we report a narrow linewidth whispering gallery mode lasing from all-inorganic perovskite quantum dots (CsPbBr 3 QDs), illustrating facile and cost-effective properties. CsPbBr 3 QDs with excellent properties were synthesized by hot injection method and used as gain media for lasers, and microspheres as optical resonators . The whispering gallery mode laser with a quality factor Q of 4791 and a narrow linewidth of 0.11 nm was obtained at room temperature. The WGM microlaser achieved by this paper could be a great application prospects in biotechnology.
研究领域:
光学
·
光子学
·
材料科学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2025
·Vol. 33
·期 8
·18358-18368
·
IF 3.3
Yan Miao,Yan Miao,Youxin Chen,Youxin Chen,Wenqian Zhang,Wenqian Zhang,Qingkang Wang,Qingkang Wang,Kaiyu Wu,Kaiyu Wu
Quasi-bound states in the continuum (QBIC) offering high Q factors possess great value in fields such as sensing, nonlinear optics, and imaging. However, limited by loss in materials and the demanding requirements for accuracy in fabrication, realizing high-quality QBIC devices is challenging in THz, especially at high THz frequencies where conventional materials become more lossy and the dimension of the device shrinks. Here, we report a polymeric dual-band QBIC device in THz. It exhibits an ultrahigh experimental Q factor of 427.1 above 4 THz. The device is composed of an asymmetric resonant waveguide grating structure made of low-loss styrene-butadiene-styrene polymer, obtained by a simple and precise version printing method suitable for mass production. Spectral shapes and Q factors of the two QBIC bands can be independently adjusted, demonstrating flexibility towards different potential applications. The presented strategy with the achieved device shall promote the application of THz technology in high-frequency THz bands.
研究领域:
太赫兹技术
·
光子学
·
光学器件
·
材料科学
·
传感技术
·
纳米制造
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）