{"title":"Rb2SO4 晶体的压光特性和红外光谱","authors":"","doi":"10.1016/j.optmat.2024.116320","DOIUrl":null,"url":null,"abstract":"<div><div>The paper deals with the dispersion dependences of birefringence Δ<em>n</em><sub>i</sub>(λ) of the mechanically free and uniaxially clamped Rb<sub>2</sub>SO<sub>4</sub> crystal along different crystal-physical axes at room temperature. It was found that the crystal has an insignificant normal dispersion d(Δ<em>n</em><sub>x</sub>)/dλ χ ≤ 0, and uniaxial compressions σ<sub>m</sub> do not change the character, but only the slope of the dependences Δ<em>n</em><sub>i</sub>(λ). Uniaxial loads shift the position of the optical isotropic point both in the short-wavelength (σ<sub>z</sub>) and in the long-wavelength part of the spectrum (σ<sub>y</sub>). The spectral dependences of the combined piezo-optical coefficients <span><math><mrow><msubsup><mi>π</mi><mrow><mi>k</mi><mi>m</mi></mrow><mi>o</mi></msubsup><mrow><mo>(</mo><mi>λ</mi><mo>)</mo></mrow></mrow></math></span> were calculated and it was found that they have an insignificant dispersion dependence, and the absolute values of the piezo-optical coefficients <span><math><mrow><msubsup><mi>π</mi><mn>31</mn><mi>o</mi></msubsup></mrow></math></span> and <span><math><mrow><msubsup><mi>π</mi><mn>21</mn><mi>o</mi></msubsup></mrow></math></span> are equal to each other in the vicinity of the optical isotropic point at the light wavelength λ = 490 nm. The reflection spectra of Rb<sub>2</sub>SO<sub>4</sub> crystals were measured in the infrared range at room temperature using FT-IR spectrometer and synchrotron radiation and the corresponding <em>ab initio</em> calculations of the phonon partial density of states and the dielectric function were performed.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Piezo-optical properties and infrared spectra of Rb2SO4 crystals\",\"authors\":\"\",\"doi\":\"10.1016/j.optmat.2024.116320\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The paper deals with the dispersion dependences of birefringence Δ<em>n</em><sub>i</sub>(λ) of the mechanically free and uniaxially clamped Rb<sub>2</sub>SO<sub>4</sub> crystal along different crystal-physical axes at room temperature. It was found that the crystal has an insignificant normal dispersion d(Δ<em>n</em><sub>x</sub>)/dλ χ ≤ 0, and uniaxial compressions σ<sub>m</sub> do not change the character, but only the slope of the dependences Δ<em>n</em><sub>i</sub>(λ). Uniaxial loads shift the position of the optical isotropic point both in the short-wavelength (σ<sub>z</sub>) and in the long-wavelength part of the spectrum (σ<sub>y</sub>). The spectral dependences of the combined piezo-optical coefficients <span><math><mrow><msubsup><mi>π</mi><mrow><mi>k</mi><mi>m</mi></mrow><mi>o</mi></msubsup><mrow><mo>(</mo><mi>λ</mi><mo>)</mo></mrow></mrow></math></span> were calculated and it was found that they have an insignificant dispersion dependence, and the absolute values of the piezo-optical coefficients <span><math><mrow><msubsup><mi>π</mi><mn>31</mn><mi>o</mi></msubsup></mrow></math></span> and <span><math><mrow><msubsup><mi>π</mi><mn>21</mn><mi>o</mi></msubsup></mrow></math></span> are equal to each other in the vicinity of the optical isotropic point at the light wavelength λ = 490 nm. The reflection spectra of Rb<sub>2</sub>SO<sub>4</sub> crystals were measured in the infrared range at room temperature using FT-IR spectrometer and synchrotron radiation and the corresponding <em>ab initio</em> calculations of the phonon partial density of states and the dielectric function were performed.</div></div>\",\"PeriodicalId\":19564,\"journal\":{\"name\":\"Optical Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-10-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optical Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0925346724015039\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925346724015039","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Piezo-optical properties and infrared spectra of Rb2SO4 crystals
The paper deals with the dispersion dependences of birefringence Δni(λ) of the mechanically free and uniaxially clamped Rb2SO4 crystal along different crystal-physical axes at room temperature. It was found that the crystal has an insignificant normal dispersion d(Δnx)/dλ χ ≤ 0, and uniaxial compressions σm do not change the character, but only the slope of the dependences Δni(λ). Uniaxial loads shift the position of the optical isotropic point both in the short-wavelength (σz) and in the long-wavelength part of the spectrum (σy). The spectral dependences of the combined piezo-optical coefficients were calculated and it was found that they have an insignificant dispersion dependence, and the absolute values of the piezo-optical coefficients and are equal to each other in the vicinity of the optical isotropic point at the light wavelength λ = 490 nm. The reflection spectra of Rb2SO4 crystals were measured in the infrared range at room temperature using FT-IR spectrometer and synchrotron radiation and the corresponding ab initio calculations of the phonon partial density of states and the dielectric function were performed.
期刊介绍:
Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials.
OPTICAL MATERIALS focuses on:
• Optical Properties of Material Systems;
• The Materials Aspects of Optical Phenomena;
• The Materials Aspects of Devices and Applications.
Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.