Operation of a polarization interferometer for measurement of the wavelength changes of a tunable semiconductor laser was investigated. A λ/8 waveplate made from liquid crystalline polymer is placed in one of interferometers' arms in order to generate two output signals in quadrature. Wavelength was measured with resolution of 2 pm in the wavelength range 628-635 nm. Drift of the interferometer, measured in the period of 500 s, was 8 nm, which corresponded to the change in the wavelength of 1.3 pm. If needed, wavelength-dependent Heydemann correction can be used to expand the range of operation of such interferometer.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4883324 | PMC |
| http://dx.doi.org/10.3390/s16050633 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Polymorphic Crystalline Layer at the Crystallization Front.
Phys Rev Lett
December 2024
Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
The morphology and kinetics of the crystal growth front have been poorly explored at the particle level. Here, we experimentally observe the crystal growth front in liquid with single-particle kinetics using colloid systems and reveal a surface layer of polymorphic crystal near the solid-solid transition when the two crystals form a low-energy coherent interface. The thickness of the surface crystal can exceed 50 particles and grows logarithmically with the temperature as approaching the solid-solid transition which follows premelting theory.
View Article and Find Full Text PDFControlled Synthesis of Perovskite Nanocrystals at Room Temperature by Liquid Crystalline Templates.
ACS Nano
January 2025
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea.
Perovskite nanocrystals (PNCs) are promising active materials because of their outstanding optoelectronic properties, which are finely tunable via size and shape. However, previous synthetic methods such as hot-injection and ligand-assisted reprecipitation require a high synthesis temperature or provide limited access to homogeneous PNCs, leading to the present lack of commercial value and real-world applications of PNCs. Here, we report a room-temperature approach to synthesize PNCs within a liquid crystalline antisolvent, enabling access to PNCs with a precisely defined size and shape and with reduced surface defects.
View Article and Find Full Text PDFExact projected entangled pair ground states with topological Euler invariant.
Nat Commun
January 2025
TCM Group, Cavendish Laboratory, Department of Physics, Cambridge, UK.
We report on a class of gapped projected entangled pair states (PEPS) with non-trivial Euler topology motivated by recent progress in band geometry. In the non-interacting limit, these systems have optimal conditions relating to saturation of quantum geometrical bounds, allowing for parent Hamiltonians whose lowest bands are completely flat and which have the PEPS as unique ground states. Protected by crystalline symmetries, these states evade restrictions on capturing tenfold-way topological features with gapped PEPS.
View Article and Find Full Text PDFSurface structure characterization of rubrene(001) single crystal with sum frequency generation spectroscopy and reflection high-energy electron diffraction.
J Chem Phys
January 2025
Department of Chemistry, University of Houston, Houston, Texas 77204, USA.
Rubrene is one of the leading organic semiconductors in scientific and industrial research, showing good conductivities and utilities in devices such as organic field-effect transistors. In these applications, the rubrene crystals often contact ionic liquids and other materials. Consequently, their surface properties and interfacial interactions influence the device's performance.
View Article and Find Full Text PDFEmerging 0D Hybrid Metal Halide Luminescent Glasses.
Adv Mater
January 2025
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China.
Article Synopsis
- 0D hybrid metal halide (HMH) luminescent glasses are gaining popularity due to their unique chemical properties and connection to crystalline forms, but their glass-forming abilities and luminescent characteristics are not fully understood.
- The review discusses the formation of these glasses through melt-quenching, examines the current compounds that can create stable glassy phases, and explores their structural features, such as transparency and luminescence.
- Additionally, potential applications in areas like X-ray detection, anti-counterfeiting, and information encryption are highlighted, along with insights into future developments for 0D HMH glasses.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!