faculty-profile

Dr. K Venkata Krishnaiah

info

Associate Professor

Physics

Sri Venkateswara University

11

• Quantum Materials and and Sensing • Optofluidic chip based on Whispering Gallery Mode microlaser biosensors • Fiber-top optomechanical resonators (sensors and devices), • Laser cooling of solids (theory and experiments), FBG sensors • Photodetectors • 3D microprinted electrodes – EEG sensing • Optical conversion processes for solar cells • Ultrafast laser optical waveguide inscription and Planar waveguides • Rare earth doped glass, glass-ceramics, nannomaterials (Lasers, Amplifiers, LEDs and optoelectronic devices) • Graphene-based materials/devices (Energy production and storage devices)

Quantum Photonics, Optoelectronics, Fiber-top Sensors, Photonics Materials, Energy and StorageMaterials,

Educational
Qualifications
(From Highest)

2013

Sri Venkateswara University, Andhra Pradesh, Tirupati

2008

Sri Venkateswara University, Andhra Pradesh, Tirupati

2004

Sri Krishnadewaraya University, Andhra Pradesh, Ananthapur

Professional
Experience

2025

Associate Professor at SR University, Warangal, India, from 2025-12-01 to .

2025

Assistant Professor at Rajeev Gandhi Memorial College of Engineering and Technology, Andhra Pradesh, India, from 2025-07-01 to 2025-11-30.

2021

Product Development Specialist at Blue Pin Limited, Hong Kong Science Park, New Territories, Hong Kong , from 2021-11-10 to 2025-06-30.

2021

Research Associate at The Hong Kong Polytechnic University, 11 Yuk Choi Rd, Hung Hom, Kowloon, Hong Kong, from 2021-05-01 to 2021-10-30.

2016

Assistant Professor at Rajeev Gandhi Memorial College of Engineering and Technology, Andhra Pradesh, India, from 2016-11-04 to 2021-03-30.

2013

Post-doctoral Fellow at Polytechnique de Montréal, University de Montreal, Montreal, Canada , from 2013-12-01 to 2016-09-30.

Key Publications

25. I. Iparraguirre, J. Azkargorta, R. Balda, K. Venkata Krishnaiah, C.K. Jayasankar, M. Al-Saleh and J. Fernández, Spontaneous and stimulated emission spectroscopy of a Nd3+-doped phosphate glass under wavelength selective pumping, Optics Express 19 (20) (2011) 19440-19453, IF = 3.894, Cites:20, Q2 rank, Percentile =32.8% (https://doi.org/10.1364/OE.19.019440)

24. E.S.L. Filho, K. Venkata Krishnaiah, Y.Ledemi, Y-J. Yu, Y. Messaddeq, G. Nemova, R. Kashyap, Ytterbium-doped glass-ceramics for optical refrigeration, Opt. Express 23 (2015) 4630-4640, IF = 3.894, Cites:39, Q2 rank, Percentile =32.8% (https://doi.org/10.1364/OE.23.004630)

23. K. Venkata Krishnaiah, Elton Soares de Lima Filho, Yannick Ledemi, Galina Nemova, Younes Messaddeq, and Raman Kashyap, Development of ytterbium-doped oxyfluoride glasses for laser cooling applications, npj Scientific Reports, 6 (2016) 21905, IF: 4.996, Cites:46, Q1 rank , Percentile = 18.52% (https://doi.org/10.1038/srep21905)

22. K. Venkata Krishnaiah, E. de L. Filho, Y. Ledemi, G. Nemova, Y. Messaddeq, R.Kashyap, Ytterbium-doped oxyfluoride nano-glass-ceramic fibers for laser cooling, Opt. Mater. Express, 7 (2017) 1980, IF: 3.442, Cites:26, Q2 rank, Percentile =36% (https://doi.org/10.1364/OME.7.001980)

21. G. Neelima, K. Venkata Krishnaiah*, C.S.D. Viswanath, K. Tyagarajan, N. Ravi, T. J. Prasad, Photoluminescence of terbium doped oxyfluoro-titania-phosphate glasses for green light devices, Ceramics International 44 (2018) 15304-15309, IF = 5.532 (*Corresponding author), Cites:6, Q1 rank (https://doi.org/10.1016/j.ceramint.2018.05.176), Percentile =9.09%

20. L.J.Q. Maia, J. Thomas, Y. Ledemi, K. Venkata Krishnaiah, D. Seletskiy, Y.Messaddeq, R. Kashyap, Photonic Properties of Novel Yb3+ Doped Germanium-Lead Oxyfluoride Glass-Ceramics for Laser Cooling Applications, Frontiers of Optoelectronics 11 (2018) 189-198, IF = 5.4, Cites:4, Q1 rank (https://doi.org/10.1007/s12200-018-0815-z), Percentile = 19.67%

19. C.S.D. Viswanath, K. Venkata Krishaniah* and C.K. Jayasankar, Luminescence properties of europium doped oxyfluorosilicate glasses for visible light devices,Optical Materials 83 (2018) 348-355, IF = 3.9 (*Corresponding author), Cites:21, Q1 rank (https://doi.org/10.1016/j.optmat.2018.05.057), Percentile = 23.20%

18. S. Farooq, Y.M. Reddy, R. Padmasuvarna, K. Venkata Krishnaiah*, C.S.D. Viswanath, Sk. Mahamuda, Photoluminescence of dysprosium doped antimony-magnesium-strontium-oxyfluoroborate glasses, Ceramics International 44(17) (2018) 21303, IF = 5.532 (*Corresponding author), Cites:10, Q1 rank (https://doi.org/10.1016/j.ceramint.2018.08.181), Percentile =9.09%

17. G. Neelima, K. Venkata Krishnaiah*, N. Ravi, K. Suresh, Sk. Nayab Rasool, K. Tyagarajan, T.J. Prasad, Investigation of spectroscopic properties of Sm3+-doped oxyfluorophosphate glasses for laser and display applications, Materials Research Bulletin, 110 (2019) 223-229, I.F = 5.6 (*Corresponding author), Cites:16, Q1 rank (https://doi.org/10.1016/j.materresbull.2018.10.026), Percentile = 28.48%

16. V.B. Sreedhar, K. Venkata Krishnaiah, Sk.N. Rasool, V.Venkataramu, C.K. Jayasankar, Raman and photoluminescence studies of europium doped zinc-fluorophosphate glasses for photonic applications, J. Non-Crystalline Solids, 505 (2019) 115-121, IF = 4.458, Cites:16, Q1 rank (https://doi.org/10.1016/j.jnoncrysol.2018.10.035), Percentile = 18.18%

15. G. Neelima, K. Venkata Krishnaiah*, N. Ravi, K. Suresh, K. Tyagarajan, T. J. Prasad, Investigation of optical and spectroscopic properties of neodymium doped oxyfluoro-titania-phosphate glasses for laser applications, Scripta Materialia 162 (2019) 246-250, I.F = 6.302 (*Corresponding author), Cites:12, Q1 rank (https://doi.org/10.1016/j.scriptamat.2018.11.018), Percentile = 12.50%

14. M.R.Prakash, G. Neelima, K. Venkata Krishnaiah*, N. Ravi, CS.D. Viswanath, T.S. Rao, S.M. Jilani, Holmium doped bismuth-germanate glasses for green lighting applications: A spectroscopic study, Optical Materials 94 (2019) 436–443, IF = 4.2 (*Corresponding author), Cites:13, Q1 rank (https://doi.org/10.1016/j.optmat.2019.05.003), Percentile = 23.20%

13. K. Suresh, K. Venkata Krishnaiah, Ch Basavapoornima, D.S.Rani, C.K. Jayasankar, Enhancement of 1.8 µm emission in Er3+/Tm3+ co-doped tellurite glasses: Role of energy transfer and dual wavelength pumping schemes, Journal of Alloys and Compounds 827 (2020) 154038, Cites:7, Q1 rank, IF = 6.371, (https://doi.org/10.1016/j.jallcom.2020.154038), Percentile = 11.46%

12. K. Venkata Krishnaiah, Neelima G., Ravi N., N.N.K. Reddy, H.S.K.Reddy, C.S.D. Viswanath, Lenine D., Surekha G., R.P.Suvarna R., Yuvaraj C., Venkatramu V., Near infrared broadband and visible upconversion emissions of erbium ions in oxyfluoride glasses for optical amplifier applications, Optics and Laser Technology 127 (2020) 106167, IF = 5.0, Cites:4, Q1 rank (https://doi.org/10.1016/j.optlastec.2020.106167), Percentile =20%

11. N. Ravi, Neelima G, N.N.K Reddy, K. Venkata Krishnaiah*, R. Ravanamma, V.J. Reddy, M. Prasanth, K. Suresh, P. Babu, V. Venkatramu, Role of excitation wavelength and dopant concentration on white light tunability of dysprosium doped titania-fluorophosphate glasses, Optical Materials 111 (2021) 110593, IF = 4.2 (*Corresponding author), Cites:2, Q1 rank (https://doi.org/10.1016/j.optmat.2020.110593), Percentile = 23.20%

10. N.N.K.Reddy, G.Srinivas, K. Venkata Krishnaiah, K.M. Kumar, C. Yuvaraj, S.Kumar, N. Ravi, G.G.Krishna, S.A.K. Jilani and S.V.V. Prabhakar, High performance, self-powered and thermally stable 200-750 nm spectral responsive gallium nitride (GaN) based broadband photodetectors, Solar Energy Materials and Solar Cells 225 (2021) 111033, IF = 6.3, Cites:16, Q1 rank (https://doi.org/10.1016/j.solmat.2021.111033), Percentile =19.25%

9. J. Thomas, L.J.Q. Maia, K. Venkata Krishnaiah,Y. Ledemi, J. Boisvert, A. Hlil, D.Seletskiy, Y. Messaddeq, R. Kashyap, Optical properties of ytterbium doped oxyfluoride glass-ceramics - concentration and temperature dependence studies for optical refrigeration applications, Journal of Luminescence 238 (2021) 118278, IF = 4.171, Cites:3, Q2 rank (https://doi.org/10.1016/j.jlumin.2021.118278), Percentile =30.4%

8. N.N.K.Reddy, M.R.V.Reddy, V.R. Singh, K.R. Bakash, S. Kumar, D. Saha, V.Mahendran, K. Venkata Krishnaiah, G.G.Krishna, V.S.V. Prabhakar, Enhanced photoresponse performance in GaN based symmetric type MSM ultraviolet-A and MIS ultraviolet-A to C photodetectors, Sensors and Actuators: A. Physical 339 (2022) 113502, IF = 4.9, Cites:1, Q1 rank (https://doi.org/10.1016/j.sna.2022.113502), Percentile =17.72%

7. K. Venkata Krishnaiah*, P. Venkatalakshmamma, K. Upendra Kumar, P. Haritha, V. Lavin, I.R. Martin, N. Ravi, H. Satish Kumar Reddy, V. Venkatramu, Nanda Kumar Reddy Nallabala, C. Yuvaraj, Structure, morphology, photonconversion and energy transfer characteristics of Er3+/Yb3+:BaYF5 nanocrystals synthesized by hydrothermal method for photovoltaics, Ceramics International 49 (2023) 26879-26889, IF = 5.6, Q1 rank (https://doi.org/10.1016/j.ceramint.2023.05.225) (*Corresponding author), Percentile =9.09%

6. Pengcheng Zhao, K. Venkata Krishnaiah# Linhao Guo, Taige Li, Hoi Lut Ho, A. Ping Zhang and Wei Jin, Ultraminiature optical fiber-tip 3D-microprinted photothermal interferometric gas sensors, Laser & Photonics Reviews 18 (2024) 2301285, IF=10, Q1 rank, Percentile =8% (#Co-First author/Equal contribution) (https://doi.org/10.1002/lpor.202301285)

5. Taige Li, Pengcheng Zhao, Peng Wang, K. Venkata Krishnaiah, Wei Jin and A. Ping Zhang, Miniature optical fiber photoacoustic spectroscopy gas sensor based on a 3D micro-printed planar-spiral spring optomechanical resonator, Photoacoustics 40 (2024) 100657) IF=6.8, Q1 rank. (https://doi.org/10.1016/j.pacs.2024.100657), Percentile = 5.66%

4. N. Nanda Kumar Reddy, K Vamsidhar Reddy, S Kaleemulla, Shivani Sharma, V Manjunath, Suresh Kumar, G Gopi Krishana, P Rosaiah, N Ravi, K. Venkata Krishnaiah, Sunil Singh Kushvaha, Vasudeva Reddy Minnam Reddy, Yusuf Siraj Usman, Influence of high-k La2O3 interfacial oxide layer on the performance of GaN based Schottky barrier ultraviolet-B and A photodetection sensors, Optical Materials 158 (2025) 116499) IF=4.6, Q1 rank, Percentile = 23.20% (https://doi.org/10.1016/j.optmat.2024.116499)

3. Prasanth Musalikunta, Ravi Nirlakalla, Ravanamma Rallapalli, Neelima Gaddam, K. Venkata Krishnaiah*, Aboud Ahmed Awadh Bahajjaj, Nanda Kumar Reddy Nallabala, Upendra Kumar Kagola, Optimizing energy transfer in Er3+/Yb3+ Co-doped heavy metal oxide bismuth borate glasses for C-band optical amplifiers, Optical Materials 163 (2025) 116939) IF=4.2, Q1 rank, Percentile = 23.20% (https://doi.org/10.1016/j.optmat.2025.116939) (*Corresponding author)

2. Zhizheng Wang, Mohsin Raza, Bin Zhou, Nan Wang, K. Venkata Krishnaiah, Yuwen Qin, and A. Ping Zhang, 3D micro-printed polymer limacon-shaped whispering-gallery-mode microlaser sensors for label-free biodetection, Optics Letters 50 (2025) 3481-3484) IF=3.1, Q2 rank., Percentile = 32.80% (https://doi.org/10.1364/OL.557384)

1. Ravi Nirlakalla, Ravanamma Rallapalli, K. Venkata Krishnaiah, Deni Shidqi Khaerudini, Sreenivasa Kumar Godlaveeti, El-marghany Adel, V. Venkatramu, Gd(OH)?NO? rare earth ions functionalized reduced graphene oxide: A promising material for supercapacitor electrode applications, Journal of Alloys and Compounds 1040 (2025) 183512, Cites:7, Q1 rank, IF = 6.3, Percentile = 11.46% (https://doi.org/10.1016/j.jallcom.2025.183512)

Research Projects / Patents

Development of lanthanide doped fluoride nanoparticles for solar energy harvesting

Solar energy harvesting is one of the applications where a broad bandwidth becomes more significant. The Shockley-Queisser theory restricts the efficiency of c-Si solar cells to about 30%. The first transmission loss is the low energy photons more than the Si bandgap energy are not absorbed. Second, the higher energy photons than the bandgap produce a single electron-hole pair and the excess of energy is lost by thermalization losses. A possibility to increase the region of absorption of a solar cell with the help of NC

A HETEROJUNCTION FOR OPTOELECTRONIC SYSTEM AND A METHOD OF FABRICATION THEREOF

The proposed invention provides metal-insulator-semiconductor heterojunction for optoelectronic system. Said heterojunction comprises gold or silver as metal, cerium oxide as insulator and boron doped p-Si <100semiconductor. The fabricated Au/CeO2/p-Si heterojunction was tested for the functioning as a broadband photodetector as well as for CO2 gas sensor. The fi ndingsthis heterojunction has the potential to serve as an advanced photosensitive switch in the evolving fi eld of optoelectronics.

Awards and Honors / Achievements

Project

Ranked among the Top 2% world scientists recognised by Stanford University, USA -2025 (Applied Physics – Optoelectronic devices)

Project

Associate Fellow (life) award received from Andhra Pradesh Academy of Science (2021).

Books

Broadband Emission in Tellurite glasses

K. Venkata Krishnaiah, Jose Marques Hueso and Raman Kashyap

Springer International Publishing AG

Lanthanide doped tellurite glasses for solar energy harvesting

2. K. Venkata Krishnaiah, V. Venkatramu and C.K. Jayasankar,

Springer International Publishing AG

Gallium Nitride (GaN)-Based Ultraviolet/Broadband Photodetectors Using High-k Dielectric Oxides as an Interfacial Oxide Layer

Nallabala Nanda Kumar Reddy and K. Venkata Krishnaiah

Nova Science Publishers, Inc., USA

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