Guha Lab

Recruiting
We are looking for two graduate students for material science research in imprint crystallization and near field epitaxy this year (2018-19) Incoming IME/Physics students are encouraged to apply. We are also looking for one post-doctoral candidate for sensor research.

  • Post-doc openings The postdoctoral researcher candidate will carry out research on a NSF-funded project focusing on developing integrated silicon photonics based sensors for point-of-interest soil micronutrient detection, and water quality measurement. Our group has developed an integrated silicon photonics platform for sensing applications, and the candidate will be primarily responsible for further developing functionalization materials for analyte specificity and selectivity and their integration with the photonic devices. Applicants with a Ph.D. degree from a range of areas including Engineering, Chemistry, Physics, and Biology are welcomed. Hands-on experience in nanofabrication and surface modification/functionalization are required. Familiarity with peptide synthesis, measurement and computing software (Labview, Matlab, or other equivalent software) and optical characterization is a plus. Interested candidates should email Dr. Guha (guha@uchicago.edu) and Dr. Zhang (xufeng@uchicago.edu)

  • Graduate student openings We are looking for two graduate students for material science research in imprint crystallization and near field epitaxy this year (2018-19). Incoming IME/Physics students at UChicago interested in joining our lab can email Dr. Guha

The Guha Lab’s research focuses on new materials and systems for information processing and sensing. Current projects are in the following areas:

  1. New oxide based materials and devices for neuromorphic architectures and non-volatile memory: This work encompasses low energy, non volatile devices for synapses and neurons that may be used in neuromorphic architectures, and devices for non-volatile memory and selector switch applications. (Collaborators: Prof. Suman Datta, Notre Dame; Dr. S. Sankaranarayanan, Argonne).

  2. Epitaxial rare earth oxide based solid state qubits on silicon platforms for quantum information science: This research examines molecular beam epitaxially grown rare earth oxide heterostructures on silicon that are doped aliovalently for solid state qubit applications. Advantages of such systems are compatibility with silicon microelectronics and silicon photonics technologies, enabling direct on-chip coupling to photons, and the electronic modulation of the qubits. (Collaborators: Prof. Tian Zhong, U Chicago; Prof. D. Awschalom, U Chicago; Dr. Tijana Rajh, Argonne).

  3. Thoreau: Cyberphysical Sensor Networks and Sensor Technologies for Water and Soil (link to website): There is an enormous need for monitoring and mapping soil and water quality at high spatial and temporal resolution — it has consequences for soil and plant science, and impact on globally relevant issues such as environmental management, food security, and human health. The geochemical and microbial cycling of soils for example are not well understood and there is need for better data in order to develop more accurate models of soil. Similarily, river and lake pollution, the prediction of pollution spread, compliance enforcement, and the effect of water quality on human health and socio-economic conditions can be much better understood with better data. Our research constitutes of two parts: (i) the development of fully buried wireless underground cyberphysical sensor networks for soil monitoring and the development of mobile sensing platform based sensor networks for river and lake monitoring; and (ii), the development of better sensors using silicon photonics platforms and functionalization chemistry for difficult to measure parameters such as e. coli, total colliform and heavy metals in water, and dissolved nitrates in soil. (Collaborators: Dr. M. Ghosh, U Chicago; Prof. A. Malani, U. Chicago; Dr. S. Chary, Administrative Staff College of India, Prof. S. Sarkar, Ambedkar U, India; Prof. T. Dutta, IIT-BHU, India; Prof. A. Gupta, IIEST Shibpur, India; Dr. P. Jamiwal, ATREE, India; Dr. X. Zhang and Dr. B. Dirroll from Argonne, Dr. S. Randhawa, IBM Research; SigFox).

  4. Creating single crystal films and three dimensional structures on arbitrary substrates: Commercial silicon technologies, such as those used for fabricating microprocessor chips for computing and mobile telephones, or for solar cells, rely upon the high quality single crystal silicon layers on an expensive silicon wafer. If one could build high quality silicon layers on cheap substrates such as glass, and without the need for an expensive silicon wafer, it would alter the way we do microelectronics and solar cell manufacturing. This project explores ways of using imprint crystallization and near field epitaxy to create such layers. (Collaborators: Dr. S. Sankaranarayanan, Dr. Saw Hla & Dr. N. Guisinger, all from Argonne).