Office: MEYR 366
Dr. N. B. Singh, a Fellow of the American Society of Materials (ASM) International, a Fellow of the Society of Photonics and Instrumentations Engineering (SPIE) and a Fellow of the Optical Society of America is internationally known for his researches on EOIR, Lasers, AO, RF, Microelectronic materials and Chemical, Biological and Radiation detectors. Dr. Singh’s interests center on “Development of Materials, Devices and Subcomponents for Military and commercial Applications” which utilize solidification, physical vapour transport, crystal growth of bulk, thin crystals, nanocubes, nanodots, coatings, device fabrications and characterization. Currently, this research has following foci:
1. Chemical and materials processes: Development of chemical and mechanical processes which involved chemistry, thermodynamics, fluid flow, etching, coatings and metallurgical knowledge.
2. Nanowires based Naño-APDS and Nanoelectronics: Nano-APDs for single photon detections and nanoelectronic for high frequency and low power applications.
3. Dielectric Materials with colossal values for high pulse power:Development of materials with dielectric constant greater than100, 000 and processes to meet the requirements of high energy pulse applications.
4. Radiation Detector Materials: Development of novel class of detectors such as halides and chalcogenides for ƒ×-ray detections and organic and organometallic molecules for neutron detection.
5. AOTF based Hyperspectral Imagers: Development of practical Mid wave infrared (MWIR) and long wave infrared (LWIR) multi/hyperspectral Acousto-Optic (AO) crystal based imagers using unique and very anisotropic crystals grown by Bridgman and PVD method.
6. NLO Materials for MWIR and LWIR Laser Development: Development of Second harmonic (SHG) and Optical Parametric Oscillation (OPO) laser materials and fabricate by using all common mode of solidification encountered in casting, welding processes and crystal growth. Research is focused to produce materials for lasers, and electro-optic modulators.
7. Novel Heat spreader: Development of composites with very high thermal conductivity and novel approach to process materials which produces high conductivity.
8. Nanocubes and Nanodots for SWIR and MWIR detectors: Nanocubes and nanodots of PbSe type materials which have great potential for the high temperature detectors.
9. Novel large area materials for Commercial/Defence Applications; Large area (6”) size SiC and AlN are essential for commercial and defense applications. Physical vapor deposition (PVD) cannot produce at this stage high quality large size boules of that size. We are developing novel technique which will meet this goal.
10. RF Heterostructure Materials for High Power Applications: Development of wide band heterostructures of SiC and AlN by PVD for high power applications: Interactions involve fluid-mechanical forces, convective heat transfer, and solutal diffusion fields near solid-liquid and solid-vapor interfaces.
11. UV Filter Sensors: UV crystals are excellent for plume detections nd for biological microscopes. We are developing these materials by low temperature growth methods.
12. Laser host materials for high power lasers: Several halides and SiC-AlN has very high thermal conductivity compared to commercial YAG host and can be used for high power lasers. We are developing novel method and composition for high IRCM power applications.
13. Naño-Engineered Quantum Dot limiters for Laser threat: We are developing materials for Surface Plasmon Polaritons Quantum Dot Limiters (SPPs-QDTL) for enhancing the sensitivity in low light detection and for laser threat warning systems.
14. Quasi- Phase Matched Materials: Development of Quasiphase materials for Laser frequency conversion, EM and Structural applications. It Involves domain engineering, bandgap engineering for EO applications and lattice hardening for structural applications.
15. Coating Developments (AR, AT and Protective): Development of coatings for anti-reflection (AR), anti-tamper (AT) and protection applications: Involves design and multi-level coatings for wafer, devices and components.
A partial list of the publications, presentations and internal reports is given here. Dr. Singh has published more than 200 research papers in highly reputed Journals of U.S.A., U.K., Belgium, France, Germany and India, presented more than 120 conference papers including more than 60 invited talks. He has written more than 200 trade secrets including 19 patents. He edited three books and has been in the editorial board of several journals. Currently he is an Associate Editor of the journal Progress in Crystal Growth and Characterization.
- Selenides for Nonlinear Optical applications, J. Emerging Materials Research, 1, 12, 185 (2012)
- Performance of Novel Materials for Radiation Detection: Tl3AsSe3, TlGaSe2, Tl4HgI6,J. Nuclear Instrumentation and Methods in Physics Research Section A 652, 183-185 (2011)
- Characteristics of thick ZnSe films on quasi-phase-matched (QPM) GaAs, J.Crystal Growth 312, 1142 (2010).
- Quaternary AgGaGenSe2(n+1) crystals for NLO applications, J. Crystal Growth 312 , 1114 (2010).
- Effect of AlN doping on the growth morphology of SiC, J. Crystal Research and Technology, 44, 9 903-909 (2009)
- Optical probes of orientation patterned ZnSe quasi-phase-matched devices, J. Optical Engineering , 48(11), 114201 (2009).
- (SiC)x(AlN)1-x solid-solution substrates for high temperature and high power devices ,Crystal Growth and Design, 10 (8), (2010) 3508–3514
- Effect of growth conditions on the morphology of PbSe, J. Crystal Growth, 311, 1080-1086 (2009)
- Novel quaternary semiconductor materials; growth and characterization, IEEE Trans. Nuclear Sci. 56, 3 813 (2009).
- Development of Advanced Radiation Materials and Sensors, ES Technical Journal, 1,4, 53-64 (2008).
- Morphology of thick SiC epitaxial film grown by PVT method,, J. Electronic Materials37 (2008) 379.
- Operational characteristics of LWIR AOTF based multispectral imager, J. Optical Engineering Vol.47, 1, 013201 (2008).
- Crystal growth, fabrication, and design of mercurous bromide acousto-optic tunable filters; Optical Engineering, 46, 6, 064001-6 (2007).
- Properties of NLO Crystals in THz Wavelength Region, J. Optical Engineering, 45(9), 094002-1 (2006).
- Periodically Poled Materials for Long Wavelength Infrared (LWIR) NLO Applications, J. Crystal Growth, 274/1-2, 132-137 (2005).
- X-ray studies of langasite film grown by LPE, J. Materials Science Letters, 22, 1621 (2003)
- Noncollinear optical parametric oscillator design for walk-off reduction in GaSe crystals, Optical Engineering 42/11, 3270(2003)
- Physical vapor transport growth of large AlN crystals, J. Crystal Growth 250/1-2, 107(2003)
- PVT growth and characteristics of AlN single crystals, Physics of Semiconductor Devices 1, 117 (2003)
Honors and Awards
ARO Army, sponsored on Hyperspectral Imaging
Effect of anisotropy on dendritic morphology
Journal of Crystal Growth
Journal of Optical Materials
Molecular Crystal and Liquid Crystals
Indian Journal of Chemistry
Indian Journal of Pure and Applied Physics
Journal of Materials Science and Engineering
Journal of Chemical Thermodynamics
Journal of Emerging Materials Science
Journal of Chemical Engineering
Journal of Optical Engineering
Journal of Crystal Design
Journal of Crystal Research and Technology
Journal of American Chemical Society
Journal of Optical Society of America
Sharda University, Noida (UP) India
Banaras Hindu University, Varanasi (UP) India
BBS Purvanchal University, Jaunpur (UP) India
Tilak Dhari Post-Graduate College, Jaunpur (UP) India
The main thrust of the workshop is to explore and analyze and view in deep the cutting edge researches in spectroscopy based technologies and sensors which would be immediately applicable for the detection of explosives,chemicals and biological agents. During the technical sessions of the workshop the discussions will be focused on the following topics with special emphasis to security.
Advances in Laser Spectroscopy
Chemical and Biological Detection
Optical Fiber Sensors
Materials for Clean Energy and Security
Laser Induced Breakdown Spectroscopy
Materials for Generating THz Frequency and their
Applications in Security
MEMS based Sensors
- X-ray Spectroscopy and its Applications
- IIT, Banaras Hindu University August 17, 2013
- Udai Pratap Post Graduate College, Varanasi, August 12, 2013.
- International Conference on Multi-functional Materials, Sharda University, August 21-23, 2013
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Dr. Singh and his group is involved in materials research and technology development, which is strategically focused on selecting, modeling, growing, fabricating and coating electro-optical (EO) materials for detectors, RF materials for high power RF and electronics, and materials for radiation detectors. He has personally performed and managed research for many development programs for bulk and nano engineered, FPA materials such as CZT and most recently Si based substrates for MCT substrates and CZT for radiation detection, acousto-optic (AO) based sensors, dielectric materials, QPM structures for Mid-IR lasers and AlN and SiC substrates for high power RF and high temperature microelectronics, organic materials for substrates and nonlinear optical (NLO) applications and radiation detector materials. He has transferred AO sensor technologies using TAS, high temperature UV filter for PMAWS system, and hyperspectral imaging technology based on TAS crystals for far-IR wavelength. His researches can be summarized as:
- Nanocubes and Nanodots for SWIR and MWIR detectors
- Chemical and materials processes
- Dielectric Materials with colossal values for high pulse power
- Nanowires based Naño-APDS
- Radiation Detectors and Materials
- AOTF based Hyperspectral Imagers
- NLO Materials for MWIR and LWIR Laser Development Novel approach for Diamon-Al and Diamond-Cu Heat spreader
- SiC Bulk single crystals and novel large area materials for Commercial/Defense Applications
- UV Filter Sensors for Missile Warning
- Ga2O3 and SiC –AlN Wurtzite materials for Commercial and Defense Electronics
- Laser host materials for high power lasers
- Nano-Engineered Quantum Dot limiters for Laser threat
- Focal Plane Materials and IR detectors
- MWIR and LWIR Lasers
- Organic Materials for Substrates and high efficiency NLO Applications