We report a new facile route to synthesizing KNbO, a rare microporous niobate. When hydrothermally treated under alkali conditions, a layered niobate, KNbO·3HO, was converted to KNbO. This product had a much smaller particle size than KNbO, prepared by a conventional solid-state reaction, and showed enhanced adsorption properties.
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http://dx.doi.org/10.1021/acs.inorgchem.7b01796 | DOI Listing |
Nanophotonics
August 2024
ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia.
The ever-increasing demand for high-speed data communication has fueled the development of ultra-fast electro-optic modulators. Our proposed equalizer configuration in lithium niobate on insulator electro-optic (LNOI-EO) modulators offers a novel approach to the bandwidth-voltage trade-off. Using 3D simulations, we achieved an ultra-high bandwidth of 300 GHz, delivering more than three times enhancement compared to the conventional modulators with the same base modulator length and half-wave voltage of 4.
View Article and Find Full Text PDFBeilstein J Nanotechnol
November 2024
Centre for Quantum Engineering, Research and Education (CQuERE), TCG-Centres for Research and Education in Science and Technology (TCG-CREST), Sector V, Salt Lake, Kolkata-700091, India.
Lithium niobate (LN) stands out as a versatile nonlinear optoelectronic material which can be directly applied in tunable modulators, filters, parametric amplifiers, and photonic integrated circuits. Recently, LN photonic crystals have garnered attention as a compelling candidate for incorporation into photonic integrated circuits, showcasing their potential in advancing the field. Photonic crystals possess a widely acknowledged capability to manipulate the transmission of light modes, similar to how nanostructures have been utilized to regulate electron-related phenomena.
View Article and Find Full Text PDFThin film lithium niobate (TFLN) modulators with low driving voltage and high bandwidth are desirable for fiber-optic communication. Enhancing the modulation efficiency of TFLN modulators can reduce the device length while maintaining a low driving voltage, leading to more dies per wafer and subsequently lower fabrication cost. However, waveguide loss induced by metal absorption limits the electrodes spacing, thereby constraining the modulation efficiency.
View Article and Find Full Text PDFUltrasonics
February 2025
State Key Laboratory of Materials for Integrated Circuits,Shanghai Institute of Microsystem and Information Technology, Shanghai 200050, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, Beijing 100190, China. Electronic address:
With the exploding demand of rapid information transmission, high-frequency acoustic filtering devices are becoming an immediate need. Longitudinal leaky surface acoustic wave (LL-SAW) devices with unique advantages can be a promising platform. In this paper, we introduce a 100 nm intermediate oxide layer into the X-cut lithium niobate on silicon carbide (LiNbO/SiC) to improve the in-band performance of LL-SAW resonators.
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