Investigation of optical and thermochromic properties of reactively sputtered multiphase vanadium oxide thin films Chinmaya Kar, R De, C Prathap, S R Polaki, A Rath, et al. Physica Scripta, 2025 Amorphous vanadium oxide thin films can exhibit different optical, electrical, and chemical properties as compared to the pure phase crystalline films. In this study, multiphase vanadium oxide thin films are grown by reactive sputtering and the effect of variation in oxygen flow rate on the optical and thermochromic properties of the films in visible region is investigated. The significant variation of optical properties like transmission and refractive index of the films with respect to oxygen partial pressure during deposition is observed in the spectroscopic ellipsometry and transmission measurements. The temperature dependent transmittance of the samples shows enhancement of visible region thermochromicity with oxygen partial pressure. The optical behavior is supported by analysis of multiphase nature of the films using Raman and x-ray photoelectron spectroscopy. x-ray diffraction examines the partial crystalline character of the films with increasing oxygen flow rate and demonstrates the phase evolution of the films toward the thermodynamically stable α -V 2 O 5 phase.
In-situ optimization of lateral film uniformity in PVD system by using Fiber Bragg grating temperature sensors S Maidul Haque, S D V S Jagannadha Raju, Avijit Kumar, B Karthik Goud, Sanjay Rai, et al. Physica Scripta, 2024 Fiber Bragg grating (FBG) based temperature sensing method has been employed in this work for measuring the lateral temperature distribution on substrate plane during pulse DC magnetron sputtering deposition for optimization of lateral film uniformity. The evolution of temperature distribution with the variation of important process parameters like pulse width (496–1616 ns), deposition pressure (3.1 × 10−3–1.9 × 10–2 mbar) and sputtering power (25–250 W) have been measured over 40 mm radial distance on glass substrate horizon. To investigate the effect of substrate height on the temperature distribution, the later has been measured at two different substrate heights (60 mm and 90 mm) for varying sputtering power. Finally, the effect of variation in temperature distribution on uniformity of thickness and optical, morphological and structural properties have been investigated by separately depositing two HfO2 thin films at two representative extreme deposition powers (75 W and 200 W). The correlation of film non-uniformity of the above properties with the temperature distribution suggests that FBG based multipoint temperature sensing can be possibly used as an indicative tool for in situ optimization of the lateral film uniformity. In addition, the fast response and workability in plasma environment of FBG sensors enables precise in situ mapping of temperature distribution in sputtering process.
Effect of Postdeposition Heat Treatment on the Nanoplasmonic Behavior of Glancing Angle-Deposited Silver Nanostructures Rajnarayan De, Bujagouni Karthik Goud, Chinmaya Kar, Sk Maidul Haque, Anil Krishna Debnath, et al. Physica Status Solidi A Applications and Materials Science, 2023 Postdeposition heat treatment‐induced modifications of nanoplasmonic response in glancing angle‐deposited (GLAD) Ag nanostructures are systematically investigated. The as‐deposited GLAD Ag thin films are annealed at various temperatures namely 200, 250, 300, and 350 °C in air atmosphere. The reduction in localized surface plasmon resonance (LSPR) absorption peak width is detected with annealing. Morphological characterization of the as‐deposited and annealed films reveals reduction in grain size and shape distributions responsible for narrowing of the LSPR peak width. The refractive index sensitivities of the as‐deposited and annealed films are measured using an in‐house‐developed optical setup and figure of merit (FOM) of the sensors is also estimated. An increase in FOM of the sensors is observed upon annealing while sensitivity is found to be reduced. E‐field profile surrounding the Ag nanoparticles is also simulated to explain the experimental observations on refractive index sensitivity of the films.
Fiber Bragg grating sensor for in situ substrate temperature measurement in a magnetron sputtering system S D V S Jagannadha Raju, S Maidul Haque, B Karthik Goud, Rajnarayan De, J S Misal, et al. Physica Scripta, 2022 Fiber Bragg grating sensors are used to monitor physical parameters like temperature even in inaccessible, unconventional environments. One such application is monitoring the temperature of a substrate from the back surface like any conventional thermocouple sensor and simultaneously monitoring the temperature on the front surface, which is in contact with ion plasma in a magnetron sputtering system. Since thin film parameters depend on substrate temperature, precise measurement plays an important role and thermocouple-like sensors are erroneous when placed on the front side of a substrate exposed to ion plasma. The lateral variation of temperature on the front side for larger substrates also has been established at four different locations, exploiting the multiplexing capability of FBGs. In this report, we demonstrate and utilise the versatility and capability of fiber Bragg grating sensors for online monitoring of substrate temperatures during thin film deposition, for the first time to the best of our knowledge, on different types of substrates. FBG based approach is expected to significantly aid in better control of thin film devices.
Designing multilayer mirror structures to achieve high pupil transmittance uniformity in EUV lithography SM Haque, S Uji, M Toyoda Optical Engineering 65 (4), 045103 , 2026 2026
Investigation of optical and thermochromic properties of reactively sputtered multiphase vanadium oxide thin films C Kar, R De, C Prathap, SR Polaki, A Rath, PK Sahoo, UK Goutam, ... Physica Scripta 100 (11), 115956 , 2025 2025
An Integrative Streetscape with Modular Design Guideline of the Spinal Streets of Sylhet City Corporation Area, Bangladesh MS Arefin, S Chowdhury, S Roy, SKN Haque Journal of Innovative Science and Research Technology 10 (8), 1838-1856 , 2025 2025
Fabrication of birefringent plasmonic structures using novel collimated glancing angle E-beam evaporation method SM Haque, BK Goud, G Ghorai, R De, C Prathap, PK Sahoo, S Pradhan Optical Materials 159, 116666 , 2025 2025 Citations: 1
In-situ optimization of lateral film uniformity in PVD system by using Fiber Bragg grating temperature sensors SM Haque, S Jagannadha Raju, A Kumar, B Karthik Goud, S Rai, R De, ... Physica Scripta 99 (8), 085509 , 2024 2024
Influence of in-situ substrate temperature on anisotropic behaviour of glancing angle grown nickel nanocolumns R De, S Augustine, B Das, MK Sikdar, M Ranjan, PK Sahoo, SM Haque, ... Applied Physics A 130 (2), 126 , 2024 2024 Citations: 2
Effect of Postdeposition Heat Treatment on the Nanoplasmonic Behavior of Glancing Angle‐Deposited Silver Nanostructures R De, BK Goud, C Kar, SM Haque, AK Debnath, MK Sikdar, PK Sahoo, ... physica status solidi (a) 220 (19), 2300427 , 2023 2023 Citations: 1
Design and development of Fabry–Perot etalon based color filter using ebeam GLAD technique: Simulation and experiment SM Haque, R De, JS Misal, C Prathap, KD Rao Optics Communications 541, 129551 , 2023 2023 Citations: 2
To compare the efficacy and safety of Rosuvastatin, Atorvastatin and Pravastatin among dyslipidemic diabetic patients at a tertiary centre in Bihar. M Kumar, SP Chandra, M Manohar, S Kumar, SM Haque Journal of Pharmaceutical Negative Results 14 (3) , 2023 2023
Multi-objective non-linear solid transportation problem with fixed charge, budget constraints under uncertain environments S Haque, AK Bhurjee, P Kumar Systems Science & Control Engineering 10 (1), 899-909 , 2022 2022 Citations: 17
In-situ evolution of temperature dependent attenuation coefficients of plasmonic silver nanostructures SM Haque, SJ Raju, R De, C Prathap, MK Sikdar, PK Sahoo, KD Rao Optical Materials 133, 112942 , 2022 2022
Fiber Bragg grating sensor for in situ substrate temperature measurement in a magnetron sputtering system S Jagannadha Raju, SM Haque, BK Goud, R De, JS Misal, KD Rao Physica Scripta 97 (9), 095505 , 2022 2022 Citations: 8
Beam based diagnostic and four dimensional transverse emittance measurement using solenoid scan for 100 keV thermionic electron gun at VECC, Kolkata S Dechoudhury, S Haque, MZ Abdul Naser, S Mukherjee, AK Jain, V Naik Journal of Instrumentation 17 (06), T06003 , 2022 2022 Citations: 4
Spatially selective nanoplasmonic response in Ag embedded GLAD TiO2 nanocomposite thin films R De, SM Haque, MK Sikdar, PK Sahoo, S Kesari, CK Singh, S Augustine, ... Optical Materials 126, 112122 , 2022 2022 Citations: 7
‘নারী মৎস্যচাষিদের কথা’(Voice of Women fish farmers) S Haque, M Ahmed DBC News , 2022 2022
E‐Beam Evaporation of Silicon: Native Oxidation and Quasicontinuous Tailoring of Optical Properties SM Haque, R De, C Prathap, SK Srivastava, KD Rao physica status solidi (a) 218 (22), 2100299 , 2021 2021 Citations: 4
CW laser damage study in Ag/TiO2 bilayer thin films: Role of interfacially diffused plasmonic silver nanoparticles SM Haque, R De, C Prathap, S Kumar, GLN Reddy, S Mishra, KD Rao Optical Materials 117, 111135 , 2021 2021
Fabrication of TiO 2 -based broadband single-layer anti-reflection coating by collimated glancing angle deposition technique R De, SM Haque, MK Sikdar, PK Sahoo, KD Rao Nanotechnology 32 (24), 245708 , 2021 2021 Citations: 8
Morphology-dependent optical and wetting behavior of GLAD PTFE thin films R De, SM Haque, R Singh, CB Basak, S Jena, JS Misal, DD Shinde, ... Journal of Coatings Technology and Research 18 (1), 173-182 , 2021 2021 Citations: 2
Local structural investigations of Fe-doped TiO2 amorphous thin films AK Yadav, SM Haque, DK Shukla, DM Phase, SN Jha, D Bhattacharyya Thin Solid Films 716, 138435 , 2020 2020 Citations: 6
MOST CITED SCHOLAR PUBLICATIONS
Omnidirectional photonic band gap in magnetron sputtered TiO2/SiO2 one dimensional photonic crystal S Jena, RB Tokas, P Sarkar, JS Misal, SM Haque, KD Rao, S Thakur, ... Thin Solid Films 599, 138-144 , 2016 2016 Citations: 98
Effect of ethrel, chlormequat chloride and paclobutrazol on growth and pyrethrins accumulation in Chrysanthemum cinerariaefolium Vis. S Haque, AHA Farooqi, MM Gupta, RS Sangwan, A Khan Plant Growth Regulation 51 (3), 263-269 , 2007 2007 Citations: 86
Investigation of optical and microstructural properties of RF magnetron sputtered PTFE films for hydrophobic applications S Tripathi, SM Haque, KD Rao, R De, T Shripathi, U Deshpande, ... Applied Surface Science 385, 289-298 , 2016 2016 Citations: 48
Investigation of Fe doped ZnO thin films by X-ray absorption spectroscopy AK Yadav, SM Haque, S Tripathi, D Shukla, MA Ahmed, DM Phase, ... RSC advances 6 (78), 74982-74990 , 2016 2016 Citations: 39
Effect of substrate bias and oxygen partial pressure on properties of RF magnetron sputtered HfO2 thin films M Haque, PR Sagdeo, S Balaji, K Sridhar, S Kumar, D Bhattacharyya, ... Journal of Vacuum Science & Technology B 32 (3) , 2014 2014 Citations: 31
Surface roughness and interface width scaling of magnetron sputter deposited Ni/Ti multilayers S Maidul Haque, A Biswas, D Bhattacharya, RB Tokas, D Bhattacharyya, ... Journal of Applied Physics 114 (10) , 2013 2013 Citations: 27
Study of hafnium oxide thin films deposited by RF magnetron sputtering under glancing angle deposition at varying target to substrate distance SM Haque, KD Rao, JS Misal, RB Tokas, DD Shinde, JV Ramana, S Rai, ... Applied Surface Science 353, 459-468 , 2015 2015 Citations: 26
X-ray absorption spectroscopy of Mn doped ZnO thin films prepared by rf sputtering technique AK Yadav, SM Haque, D Shukla, RJ Choudhary, SN Jha, ... AIP Advances 5 (11) , 2015 2015 Citations: 25
Effect of multiple polycyclic aromatic hydrocarbons (PAHs) on liver of three teleostean fishes Labeobata, Labeorohita and Cirrhinusmrigala in Burdwan Loco Tank, Burdwan, West … S Haque, S Mondal, D Kundu, AR Ghosh Austin Environ. Sci 2 (1), 1017 , 2017 2017 Citations: 23
Glancing angle deposition of SiO2 thin films using a novel collimated magnetron sputtering technique SM Haque, KD Rao, S Tripathi, R De, DD Shinde, JS Misal, C Prathap, ... Surface and Coatings Technology 319, 61-69 , 2017 2017 Citations: 20
Multi-objective non-linear solid transportation problem with fixed charge, budget constraints under uncertain environments S Haque, AK Bhurjee, P Kumar Systems Science & Control Engineering 10 (1), 899-909 , 2022 2022 Citations: 17
Extended x-ray absorption fine structure measurements on asymmetric bipolar pulse direct current magnetron sputtered Ta 2 O 5 thin films S Maidul Haque, PR Sagdeo, DD Shinde, JS Misal, SN Jha, ... Applied Optics 54 (22), 6744-6751 , 2015 2015 Citations: 17
Feline babesiosis M Kumar, P Shekhar, S Haque, D Mahto Veterinary World 1 (4), 120 , 2008 2008 Citations: 16
Effect of oxygen partial pressure in deposition ambient on the properties of RF magnetron sputter deposited Gd 2 O 3 thin films S Maidul Haque, R De, S Tripathi, C Mukherjee, AK Yadav, ... Applied Optics 56 (22), 6114-6125 , 2017 2017 Citations: 13
Effect of oxygen partial pressure on properties of asymmetric bipolar pulse dc magnetron sputtered TiO 2 thin films S Maidul Haque, PR Sagdeo, A Sagdeo, SN Jha, D Bhattacharyya, ... Applied Optics 54 (13), 3817-3825 , 2015 2015 Citations: 13
Contagious caprine pleuropneumonia in kids in Ranchi. M Shaheen, S Haque, DK Thakur 2001 Citations: 12
Plasmonic effect of diffused Ag nanoparticles in EB evaporated Ag/TiO2 bilayer thin films and role of oxygen pressure SM Haque, R De, S Tripathi, RK Sharma, SR Polaki, KD Rao Journal of Alloys and Compounds 849, 156553 , 2020 2020 Citations: 11
Local Structure Investigation of Mn‐ and Co–Doped TiO 2 Thin Films by X‐Ray Absorption Spectroscopy AK Yadav, SM Haque, R De, MA Ahmed, V Srihari, M Gupta, DM Phase, ... ChemistrySelect 2 (34), 11012-11024 , 2017 2017 Citations: 11
Surface characterization of magnesium fluoride thin films prepared by a fluorine trapping based non-reactive sputtering technique R De, SM Haque, S Tripathi, KD Rao, C Prathap, M Kumar, T Som, ... Vacuum 134, 110-119 , 2016 2016 Citations: 11
Epidemiology of blood protozoan diseases of cattle in Jharkhand P Shekhar, S Haque Indian veterinary journal 84 (10), 35-37 , 2007 2007 Citations: 11
