People

About me

My core research interest is development of Neuromorphic Computing hardware for next generation of energy-efficient, intelligent and adaptive computing and sensing. More specifically, my team's research focus is Non-volatile Memories, synaptic weight elements and leaky-integrate and fire neuron components based on Back-end CMOS compatible Ferroelectric thin films and oxide or 2D semiconductor based heterostructures. My research experience and interest also includes Spintronic components like magnetic tunnel junctions and different other emerging solid state electronic devices including optoelectronic and flexible and wearable sensor components.

Responsibilities

Teaching Courses on Semiconductor Device Physics (spring 2024) and Future Computing Devices and Architecture (upcoming, Fall 2024) and Research on Beyond CMOS computing devices and systems.

Field of expertise

Micro and Nanoscale Solid-state Electronic Device design and fabrication; Characterization; Modelling; and Neuromorphic Computing.

Research topics

• Neuromorphic Computing and Adaptive Sensing for Extreme Edge devices
• Low-thermal budget ferroelectric memories
• Atomic Layer Deposited (ALD) thin film devices

Research unit

Electrical Engineering

Research fields

Neuromorphic Computing hardware; Non-volatile memories; Sensing; Optoelectronics, Cryogenic Electronics for Quantum Computing

Research career

• I did my Ph. D. from Indian Association for the Cultivation of Science in 2006 working on fundamental physics of complex oxide materials down to deep cryogenic temperatures. 
• As a post-doctoral fellow in Åbo Akademi University and University of Turku in Finland, I initiated and led research on hybrid spintronic components. 
• I was chosen a Junior Group Leader by Turku Collegium for Science and Medicine working on Spintronic Components between 2010-2013.
• I worked as a visiting scientist in Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, USA in 2010 and 2011, working on magnetic tunnel junctions. 
• I was an Academy Research Fellow in Aalto University, Finland , with my key research focus on ferroelectric tunnel junction based memristors and their application as electronic synapses and neurons in neuromorphic computing. 
• As a senior scientist in VTT, my research portfolio was further diversified to include development of 2D semiconductor based memory and logic components based on ALD grown Hafnia based ferroelectric memory (FeFET, FeTFT) devices for energy-efficient hardware for neuromorphic computing.

Field of expertise

Microelectronics, analog/RF/mixed-signal circuits, digital integrated circuits, data conversion, nanometer-scale CMOS, signal processing

Research topics

My research is broadly on developing architectures, circuit techniques and signal processing concepts towards energy-efficient high-performance analog/digital/RF/mixed-signal integrated circuits and systems in nanometer-scale CMOS nodes. A dominant theme is to explore the possibility of building analog/mixed-signal circuits with digital/switch components by utilizing time-based parameters of pulse waveform for representation of analog information, thus improving the scaling-friendliness and cross-technology portability of analog interfaces. Starting from behavioral modeling of systems and communication links along with underlying nonidealities, we develop new system architectures and circuit techniques to push the performance boundary, and validate them in Silicon by designing and characterizing prototype chips in nanometer-scale CMOS technologies. Application areas of interest include 5G-Advanced/6G wireless transceivers, high-speed serial links and wireline transceivers, biomedical electronics etc. The group works in close collaboration with the SoC Hub, an ecosystem created Tampere University and a consortium of local businesses to boost research and education in the area of system-on-chip design, thus achieving synergy with industrial interests.

Applications are invited from highly motivated and talented individuals towards doctoral studies and postdoctoral research (salaried positions), throughout the year. Paid master thesis work and summer jobs are also available in the area of IC design and signal processing. Please contact for more information.

Research fields

Active research areas/projects include the following, but are not limited to those.

• Time-Based Data Conversion Circuits (VCO-based ADCs, time-based ADCs, TDCs, time-interleaved ADCs)
• High-Speed Serial Links (SerDes, wireline transceivers, waveform design)
• Wireless Transceiver Circuits for 5G/6G (Wideband receivers, beamforming, wideband transmitters)
• Digital-assistance for analog interfaces (Linearization of ADCs, linearization of PAs, compensation of mismatch errors and layout effects in transceiver circuits)
• Efficient implementation of digital circuits like filters and arithmetic circuits towards high-speed and low-power operation

Research career

Funding:

• EU Marie Curie ITN (SMArT, 860921): 818 kEUR
• Academy of Finland Project Funding (2021, 351235): 821 kEUR

Responsibilities

I work as a lecturer of basic, intermediate and advanced courses of Electronics and I supervise Bachelor's theses and coordinate the Bachelor's Seminar in Electrical Engineering. I also work as a teacher tutor for new students in Electrical Engineering and coordinate and develop teacher tutoring as well as guide other teacher tutors in the degree programmes of Computing Sciences and Electrical Engineering. I am also a responsible person for the study modules in Electronics and a member of the Computing Sciences and Electrical Engineering degree programmes' steering group.

Research fields

Printed electronics, Printed supercapacitors, Flexible energy storage systems

About me

I have joined Tampere University as a Post-doctoral research fellow for Transient Electronics for Sustainable ICT in DigitaL Agriculture Project. My current scientific interests focus on synthesizing nanocomposites and utilizing the same to fabricate 3D-printed supercapacitors using additive manufacturing methods and investigating their electrochemical behaviours for next-generation energy storage applications.

Responsibilities

Fabrication, characterization and application of 3D Printed Supercapacitors.

Field of expertise

Synthesis of sustainable nanomaterials (nanoparticles, porous materials, thin films, composites) for next-generation energy storage applications (supercapacitors and batteries).

Research topics

Nanomaterials (nanoparticles, porous materials, thin films, composites) for next-generation energy storage applications (supercapacitors and batteries) and Catalysts and reaction engineering

Research unit

Printable Electronics Research Group, Tampere University

Research fields

Development of Printed Biodegradable Supercapacitors

About me

About me: 

- Interdisciplinary background (Physics, Materials Science, Electrical Engineering, Life Sciences)

- Lab-On-Chip microscale bioelectronics sensors using Electrochemical Transistors

- Flexible electronics and microfluidic-based wearable medical sensors. 

- Micro/nano fabrications of transistors (OTFTs, OECTs, EGOFFT), and memory devices via high-k materials.

- Cleanroom lab facilities access (multilayer deposition, patterning, Photolithography, etching, etc.)

- Highly dispersive and conductive Graphene Inks 

- MATLAB, TCAD (Basic), AUTOCAD, LABVIEW

- Teaching experience for 2 years as a Physics lecturer 

- International research experience that includes India, Australia, South Korea, and Finland.

- Research Interest: Graphene; Transistors; Bioelectronic Sensors; Memory Devices

Research topics

Project Title: 

High-resolution, Printing-Based Patterning and PHOTOnic SINTERing for High-Speed, Low-Voltage Metal-Oxide Thin Film Transistors (HI-PHOTO-SINTER) 

Collaborators: 

Faculty of Information Technology and Communications (Tampere University, Finland)

Department of Electrical and Computer Engineering (Ohio State University, USA) 

VTT Technical Research Centre (Finland)