Indian Journal of Physics最新文献_第9页

Wave attractor in basin with underwater step: from discrete to continuous energy spectrum 水下阶跃盆地中的波吸引子：从离散能谱到连续能谱

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-23 DOI: 10.1007/s12648-025-03560-w

Stepan A. Elistratov, Ivan I. But

引用次数: 0

Sustenance of isotropic pressure constraint in spherically symmetric object 球对称物体各向同性压力约束的维持

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-23 DOI: 10.1007/s12648-025-03564-6

Z. Yousaf

引用次数: 0

Heavy quarkonium dissociation in the presence of magnetic field and anisotropy using dissociation energy criterion 利用离解能准则研究重夸克在磁场和各向异性存在下的离解

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-22 DOI: 10.1007/s12648-024-03503-x

Rishabh Sharma, Siddhartha Solanki, Manohar Lal, Vineet Kumar Agotiya

引用次数: 0

Dynamics of Brownian particles in asymmetric confinement: Insights into Entropic Stochastic Resonance 非对称约束下布朗粒子动力学：对熵随机共振的洞察

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-21 DOI: 10.1007/s12648-025-03562-8

Syed Yunus Ali

引用次数: 0

Measures of quantum information for a graphene Dirac electron under the influence of magnetic fields 磁场影响下石墨烯狄拉克电子的量子信息测量

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-21 DOI: 10.1007/s12648-025-03563-7

Allan R. P. Moreira, Abdelmalek Bouzenada, Faizuddin Ahmed

引用次数: 0

Transition frequency and dynamic of polaron in transition metal dichalcogenide under radiowave and microwave 无线电波和微波作用下过渡金属二硫化物中极化子的跃迁频率和动力学

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-21 DOI: 10.1007/s12648-025-03548-6

J. V. Nguepnang, C. Kenfack-Sadem, Mboumba Maik Delon, M. R. Kamsap, A. Kenfack-Jiotsa, Bokoyo Barandja Vinci De Dieu, I. Zerbo

{"title":"Transition frequency and dynamic of polaron in transition metal dichalcogenide under radiowave and microwave","authors":"J. V. Nguepnang, C. Kenfack-Sadem, Mboumba Maik Delon, M. R. Kamsap, A. Kenfack-Jiotsa, Bokoyo Barandja Vinci De Dieu, I. Zerbo","doi":"10.1007/s12648-025-03548-6","DOIUrl":"10.1007/s12648-025-03548-6","url":null,"abstract":"<div>We investigated the transition frequency and dynamic of polaron in transition metal dichalcogenide (TMD) under the radiowave and the microwave using Pekar variational method. We calculated the ground and first excited states energies of polaron, the magnitude of the bandgap modulation, the mobility and the lifetime of polaron are derived. Due to the polaron’s superposition states in TMD, the qubit is formed, and the transition frequency is derived in order to value the information transfer. Our results demonstrated that: on one hand, the frequency of the microwave and the radiowave create fluctuation in the states energy of the polaron and the magnitude of the bandgap modulation. On the other hand, we found that their amplitudes increase the states energies, the lifetime and the mobility of the polaron but reduces the magnitude of the bandgap modulation. We also found that the radiowave and the microwave allow the information transfer and are helpful for controlling the state of a system.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 9","pages":"3255 - 3274"},"PeriodicalIF":1.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The enhanced nonlinear optical and optical limiting features of crystal violet dye in different liquids using low power Z-scan method 用低功率z扫描方法研究了结晶紫染料在不同液体中增强的非线性光学和光学限制特性

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-20 DOI: 10.1007/s12648-025-03569-1

N. Srinivasan Arunsankar, Natarajan Arumugam, Abdulrahman I. Almansour, Madhappan Santhamoorthy, S. Jeyaram

{"title":"The enhanced nonlinear optical and optical limiting features of crystal violet dye in different liquids using low power Z-scan method","authors":"N. Srinivasan Arunsankar, Natarajan Arumugam, Abdulrahman I. Almansour, Madhappan Santhamoorthy, S. Jeyaram","doi":"10.1007/s12648-025-03569-1","DOIUrl":"10.1007/s12648-025-03569-1","url":null,"abstract":"<div>The present work outlines the third-order nonlinear optical (TNLO) features of triphenylmethane dye, namely crystal violet (CV) dye dissolved in ethanol, methanol, DMF and DMSO using low power diode laser employed at 650 nm wavelength. The nonlinear refractive index (n2) and nonlinear absorption coefficient (β) of CV dye were determined from closed aperture (CA) and open aperture (OA) Z–scan approaches, respectively. The order of n2 and β of the CV dye in polar liquids were computed to be 10–7 cm2/W and 10–3 cm/W, respectively. The β of CV dye exhibited both positive and negative nonlinearity as a result of reverse saturable absorption (RSA) and saturable absorption (SA). The existence of RSA in CV dye dissolved in DMF and DMSO was confirmed by measured ground and excited state absorption cross-section. The CV dye displayed a self-defocusing NLO refraction in all the liquids due to thermal nonlinearity. The order of TNLO susceptibility and second order hyperpolarizability of the CV dye in polar liquids were determined to be 10–6 esu and 10–31 esu. The optical limiting (OL) study was employed and the dye exhibited low OL threshold of 1.97 × 102 W/cm2 in DMSO under low power laser.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 9","pages":"3523 - 3530"},"PeriodicalIF":1.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of the mechanism of microwave radiation generated by the weak interaction between electron beam and axial magnetized plasma 电子束与轴向磁化等离子体弱相互作用产生微波辐射的机理分析

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-17 DOI: 10.1007/s12648-025-03567-3

Shen Gao, Jing-Xin Liu, Yu wang, Hong-Chun Yuan, Jin-Ke Zhang

引用次数: 0

Structural and optical characteristics modifications of surface polyimide films by ultrasonic chemical treatment 超声化学处理对表面聚酰亚胺薄膜结构和光学特性的影响

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-15 DOI: 10.1007/s12648-025-03568-2

Lamia Guedri-Knani, Zeineb Touati, Marwa Sahraoui, Nourdin Yaakoubi, Chérif Dridi

{"title":"Structural and optical characteristics modifications of surface polyimide films by ultrasonic chemical treatment","authors":"Lamia Guedri-Knani, Zeineb Touati, Marwa Sahraoui, Nourdin Yaakoubi, Chérif Dridi","doi":"10.1007/s12648-025-03568-2","DOIUrl":"10.1007/s12648-025-03568-2","url":null,"abstract":"<div>We report on a simple and low-cost method for the surface modification of polymers by ultrasonic chemical treatment at atmospheric pressure and room temperature. Polyimide films (Kapton) were immersed in different solvents for various durations. After being subjected to ultrasonic cleaning, the surface energies of the Kapton films were determined by the wettability method to improve the adhesion of the films to a suitable coating. The results show that the surface energy of the polyimide films has an optimum value of approximately 55.1 mJ/m2 obtained for ethanol cleaning for 25 min. These values are comparable to those achieved with higher-cost and more complex techniques such as plasma treatment. The optical band gap (Eg) and the number of carbon atoms were measured by using UV-visible spectroscopy on Kapton samples to analyze their absorption. Notably, the optical band gap decreased from 2.30 to 2.24 eV after 25 min of ethanol treatment, indicating improved electronic properties. This reduction in Eg enhances light absorption and is crucial for optimizing the material’s performance in optoelectronic applications. The vibration peaks of the chemical bonds present in these films were identified using FTIR spectroscopy, which was used to characterize the films and track their progression over time. Following the use of the optimized ultrasonic cleaning method, the FTIR analysis showed an increase in the C=O symmetrical and asymmetrical stretching peaks at 1713 and 1774 cm−1, respectively, as well as C–O–C bond stretching at 1240 cm−1. Mechanical tensile tests (MTSs) were used to measure elastic parameters such as Young’s modulus, tensile strength, and strain to failure for untreated and treated samples.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 9","pages":"3509 - 3521"},"PeriodicalIF":1.7,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband dielectric spectroscopic studies of acemetacin, colchicine and bezafibrate during quench cooling, and in supercooled liquid phase by dielectric modulus formalism 用介电模量公式研究阿西美他星、秋水仙碱和贝扎菲特在淬火和过冷液相中的宽带介电光谱

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-13 DOI: 10.1007/s12648-025-03557-5

Aboothahir Afzal, Mohamed Shahin Thayyil, M. N. Shuhaib Mohamed, M. P. Nighil Nath, M. Saifunnisa, K. Shabhaz, P. A. Sivaramakrishnan

{"title":"Broadband dielectric spectroscopic studies of acemetacin, colchicine and bezafibrate during quench cooling, and in supercooled liquid phase by dielectric modulus formalism","authors":"Aboothahir Afzal, Mohamed Shahin Thayyil, M. N. Shuhaib Mohamed, M. P. Nighil Nath, M. Saifunnisa, K. Shabhaz, P. A. Sivaramakrishnan","doi":"10.1007/s12648-025-03557-5","DOIUrl":"10.1007/s12648-025-03557-5","url":null,"abstract":"<div>This study investigates the dielectric properties of three pharmaceutical melt samples during quench cooling, focusing on the molecular relaxations above and below the glass transition temperature (Tg). Broadband dielectric spectroscopy was employed to analyze the temperature dependence of dielectric permittivity and dielectric loss as the melts were cooled to a deep glassy state at different test frequencies at cooling rate of 10 K/min. Comparative study of complex dielectric permittivity and dielectric modulus in supercooled liquid and glassy states while quench cooling helps to understand the nature of glass transition phenomenon in the pharmaceuticals which are useful for preparing amorphous pharmaceuticals. The primary structural relaxation process above the glass transition temperature and the secondary relaxation process below Tg were examined to provide a comprehensive understanding of the evolving glass transition theory. Additionally, the frequency dependence (10–2–107 Hz) of the real and imaginary parts of complex dielectric modulus were analyzed on heating the glassy samples formed by quench cooling up to just below melting temperature, and the data were fitted using the Havriliak–Negami and Vogel–Fulcher–Tammann equations to extract relevant parameters. The findings offer valuable insights into the glass transition behavior and stability of complex amorphous pharmaceuticals.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 9","pages":"3319 - 3329"},"PeriodicalIF":1.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0