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Recent Publications

2025

  • Cinumon, K. V., Shwetabh, K., Barik, S., & Kumar, K. (2025). Enhanced energy transfer and upconversion luminescence in NaYF4: Er3+, Yb3+ core nanoparticles via shell sensitization for optical thermometry and security ink applications. Ceramics International, 51(12), 16828-16838.

  • Upadhyay, M. M., & Kumar, K. (2025). Negative thermal expansion enhanced upconversion emission in Y2Mo3O12: Er3+/Yb3+ phosphor. Ceramics International, 51(12), 16849-16856.

2024

  • Shwetabh, K. et al. (2024) ‘NaYF4:Ho3+/Yb3+@NaGdF4 core@shell upconversion nanoparticles for contrast enhancement in bimodal in-vitro OCT imaging’, Microchimica Acta, 191(5). doi:10.1007/s00604-024-06330-3.

  • Sarkar, Minarul I., and Kaushal Kumar. "Combustion synthesized La2O3: Er3+/Yb3+ phosphor for simultaneous upconversion emission and photo-thermal signal generation." Surfaces and Interfaces 44 (2024): 103776.

  • Upadhyay, Madan M., Neeraj Kumar Mishra, and Kaushal Kumar. "Upconversion luminescence based temperature sensing properties and anti-counterfeiting applications of GdNbO4: Tm3+/Yb3+ phosphor." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 304 (2024): 123333.

  • Shwetabh, Kumar, et al. "PEG-coated NaYF4: Tm3+/Yb3+ upconversion nanoparticles for OCT image contrast enhancer, optical thermometry, and security applications." Journal of Alloys and Compounds 980 (2024): 173493.

  • Shwetabh K, Banerjee A, Poddar R, Kumar K. Assessment of NIR-triggered PEG-coated NaGdF4:Tm3+/Yb3+ bio-compatible upconversion nanoparticles for contrast enhancement in OCT imaging and optical thermometry. Biomed Mater. 2024 Jul;19(5):055001.

  • Sarkar MI, Upadhyay MM, Kumar K. Fabrication of a photoacoustic cell and thermal diffusivity measurement of graphene oxide using photoacoustic spectroscopy. Proc Inst Mech Eng Part C J Mech Eng Sci. 2024 Apr 1;238(8):3184–9.

  • Shwetabh K, Banerjee A, Poddar R, Kumar K. Harnessing bright upconversion luminescence from PEG-coated NaGdF4:Ho3+/Yb3+ nanoparticles for contrast enhancement in dual mode OCT imaging and optical temperature sensing. Ceram Int. 2024 Oct 1;50(19, Part A):34956–65.

  • V CK, I. Sarkar M, Kumar K. Investigation of upconversion and photoacoustic properties of NIR activated Er 3+ /Yb 3+ doped [RE]VO 4 (RE = Y, Gd) phosphors for photothermal conversion applications. New J Chem. 2024;48(35):15313–23.

2023

  • Mishra, Neeraj Kumar, et al. "Probing multimodal light emission from Tb 3+/Yb 3+-doped garnet nanophosphors for lighting applications." Physical Chemistry Chemical Physics 25.16 (2023): 11756-11770.

  • Sarkar, Minarul I., and Kaushal Kumar. "Power dependent photoacoustic and photoluminescence studies on a Ho 3+/Yb 3+ doped Y 2 O 3 phosphor." RSC advances 13.19 (2023): 12723-12730.

  • Shwetabh, Kumar, Madan M. Upadhyay, and K. Kumar. "Synthesis and upconversion emission studies of CaYF 5: Ho 3+/Yb 3+ phosphor and its applications in optical thermometry, fingerprint detection, and security ink." RSC advances 13.14 (2023): 9377-9386.

  • Upadhyay, Madan M., Kumar Shwetabh, and Kaushal Kumar. "Comparative studies of upconversion luminescence and optical temperature sensing in Tm 3+/Yb 3+ codoped LaVO 4 and GdVO 4 phosphors." RSC advances 13.30 (2023): 20674-20683.

  • Mishra, Neeraj Kumar, Minarul I. Sarkar, and Kaushal Kumar. "Strategy to probe multimodal light emissions from Eu 3+/Yb 3+ activated garnet nanophosphors for LED devices and solar cell applications." Dalton Transactions 52.33 (2023): 11658-11670.

  • Sarkar, Minarul I., K. V. Cinumon, and Kaushal Kumar. "Enhancement of photoacoustic and upconversion emission in Mg 2+/Zn 2+ codoped Gd 2 O 3: Er 3+/Yb 3+ phosphor using 980 nm excitation." RSC advances 13.31 (2023): 21190-21198.

  • Krishna, K. M., et al. "Blue frequency upconversion emission and optical thermometry of Ca3 (PO4) 2: Tm3+/Yb3+." Optik 273 (2023): 170477.

  • Mishra, Neeraj Kumar, Aditya Kumar, and Kaushal Kumar. "Development of ultra-broad band light emitting single phase garnet phosphor based on energy transfer mechanism and its applications in optical temperature sensing and WLED." Journal of Alloys and Compounds 947 (2023): 169440.

  • Upadhyay, Madan M., and Kaushal Kumar. "Gd3+ ion induced UV upconversion emission and temperature sensing in Tm3+/Yb3+: Y2O3 phosphor." Journal of Rare Earths 41.9 (2023): 1295-1301.

  • Sarkar, Minarul I., and Kaushal Kumar. "Thermal diffusivity measurement of undoped Yb2O3 oxide by self-made photoacoustic cell." Materials Letters: X 19 (2023): 100213.

  • Sarkar, Minarul I., and Kaushal Kumar. "Thermal diffusivity and conductivity measurement of undoped La2O3 powder by homemade photoacoustic spectrometer." Journal of Materials Science: Materials in Electronics 34.25 (2023): 1762.

  • Sarkar, Minarul I., and Kaushal Kumar. "Thermal Diffusivity Measurement of Yttrium Oxide Powder by a Fabricated Photoacoustic Spectrometer." Heat Transfer Engineering (2023): 1-8.

  • Shwetabh, Kumar, Minarul I. Sarkar, and K. Kumar. "Optical thermometry, latent fingerprint detection and anti-counterfeiting based on upconversion emission in Ho3+/Yb3+ doped KYF4 nanoparticles." Optical Materials 145 (2023): 114395.

  • Shwetabh, Kumar, Neeraj Kumar Mishra, and K. Kumar. "NIR activated Er3+/Yb3+ doped LiYF4 upconverting nanocrystals for photothermal treatment, optical thermometry, latent fingerprint detection and security ink applications." Materials Science in Semiconductor Processing 167 (2023): 107806.

  • Sarkar, Minarul I., and Kaushal Kumar. "Effect of Mg2+ and Zn2+ addition on photoluminescent and photoacoustic spectroscopy of La2O3: Er3+/Yb3+ phosphors." Inorganic Chemistry Communications 158 (2023): 111457.

  • Sarkar, Minarul I., Lokesh Patra, and K. Kumar. "Measurement of coal quality by a home-made photoacoustic spectrometer." Optik 295 (2023): 171498

Optical Materials and Bio-imaging Research Laboratory - Department of Physics

Indian Institute of Technology (Indian School of Mines) Dhanbad

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