Designation: Associate Professor
Department: Physics
Email: kkumar[at]iitism[dot]ac[dot]in
Contact Number:
Office Number: +91-326-223-5754
Personal Page: Click Here
Research Interest: Rare-earth ions doped inorganic glasses Nano-phosphor materials Liquid Pulsed Laser Ablation (LPLA) for preparation of Nano-particles Laser Induced Breakdown Spectroscopy (LIBS) Bio-imaging using upconversion Photoacoustic spectroscopic studies
Postdoctoral fellow, Italian Institute of Technology, Italy; August 2010 - July 2011
Postdoctoral fellow, Allahabad University, Allahabad, India; July 2009 - July 2010
Senior Research Fellow, CSIR, BHU, Varanasi, India; March 2008 - April 2009
PhD in Physics- 2008, Banaras Hindu University, Varanasi, Utter Pradesh, India
Master in Science in Physics – 2000, Lucknow University, Lucknow, Utter Pradesh, India
Bachelor of Science in Physics – 1997, Lucknow University, Lucknow, Utter Pradesh, India
DUGC convenor of the Department of Physics from 2024
Co-ordinator for the Departmental level DST-FIST project (Department Programme) in 2013.
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.
Upadhyay, M. M., and K. Kumar. "Negative Thermal Expansion Enhanced Upconversion Emission in Y₂Mo₃O₁₂:Er³⁺/Yb³⁺ Phosphor." Ceramics International, 2024, https://doi.org/10.1016/j.ceramint.2024.08.471.
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.
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
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.
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
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., 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.
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.
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.
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
DST (SERB) Core Research Grand Project for Project titled "Photo-thermal optimization of upconversion nanoparticles as a contrast enhancer for Optical Coherence Tomography (OCT)" in 2024.
Project grant of 34.10 Lakh granted by DST-SERB, New Delhi for the project title of “Studies on light induced heating in upconversion nanoparticles and their optimization for the use as photo-acoustic contrast agent”
Project grant of 23.28 Lakh granted by DST-New Delhi (FAST TRACK) for the project title of “Studies on rare earth ions doped upconversion nano-pjosphors as optical sensors” in 2013.
Project grant of 12.25 Lakh granted by CSIR, New Delhi for the project title of “Development of rare-earths doped upconversion phosphor particles for finger print detection and sensors” in 2013.
Life time member of the Laser and Spectroscopy Society of India.
Member of Indian Laser Association (ILA), Indore.
Founder member of Indian Society of Nanomedicine, New Delhi
DUGC convenor of the Department of Physics from 2024
Warden of Jasper Hostel in June 2018
Department faculty coordinator CONCETTO (technical fest) during the year 2016 and
2017
Nominated member of BOCS (board of course structure) of BIT, Sindri, in 2018
Attended PG viva-voce examination of Hazaribag University in year 2016, 2017
PG-Laboratory in-charge in Department
PhD awarded (11)
Dr. Manoj Kumar Mahata
Dr. Surya Prakash Tiwari
Dr. Abhishek Kumar
Dr. Shriya Sinha
Dr. Prasenjit Prasad Sukul
Dr. Sachin Kumar Maurya
Dr. Murali Krishna Kilari
Dr. Minarul Islam Sarkar
Dr. Neeraj Kumar Mishra
Dr. Kumar Shwetabh
Dr. Madan Murari Upadhay
PhD Ongoing (4)
Mr. Cinumon K. V.
Ms. Ritu Rani
Mr. Srinibas Barik
Mr. Jayendra Pandey
