Taj Mahal, made of exquisite white calcite, continues to deteriorate due to the emission of sulphur dioxide, methane etc. by industries and vehicular exhaust caused by the dense population in the region. Our collaborative works on samples with Pietra-Dura works, representative of the Taj Mahal architecture, already showed damages and irregularities including surface discoloration due to methane, water inclusions in the volume and sub-surface cracks employing micro-Raman spectroscopy, broadband Terahertz Time Domain Imaging (THz-TDI) and THz Laser Feedback Interferometry (THz-LFI).

RECENT NEWS

May 2024

1. Dr Naini Bajaj continues in our group as a scientist whose research focus will move towards development of ultrafast fiber lasers for THz applications.

2. Arya Das joins our group for her MTech Project - she will be working on High Resolution THz Sensing of Chemicals. Welcome Arya!

April 2024

1. Mayuri Kashyap defends her PhD Dissertation on THz Spectroscopy & Imaging in Quantitative Assessment of Plant Hydration. Congratulations Dr Mayuri Kashyap! She was our first UQIDAR (joint IITD-UQ PhD Program) student.

2. Our work on Multiparameter Sensing using THz and Raman Spectroscopy has been published in Optics and Laser Technology. This was a work that has been going on in our group for some time and has contributions from both post doctoral scientists and students. 

3. Our work on Placement Bias in Terahertz Image Analysis: Implications for Computer Vision-aided Concealed Object Identification has been accepted for Poster Presentation at the Optical THz Science and Technology (OTST) Conference in Germany.

March 2024

1. Aparajita presented our work on "Fiber-coupled handheld THz scanners for field applications" as an Invited Keynote Talk in the Asia Light Conference 2024 at Singapore.

January 2024

1. Aparajita presented our work on "Fiber-coupled Raman and THz systems: future of field deployment for environmental and biomedical sensing applications" as an Invited Talk in the SPIE Photonics West 2024 conference at San Francisco, USA.

2. Urbi Kundu presented her work on "Variability in plant cell water dynamics as a genetic discriminatory method using terahertz quantum cascade laser-based laser feedback interferometry" as a poster presentation in the SPIE Photonics West 2024 conference at San Francisco, USA.

December 2023

1. Our project on the development of "Synchronized Femtosecond Fiber Lasers around 1560 nm with Controllable Repetition Rate for THz Generation and Detection" has been approved by the funding agency. This is a high value project in which CGCRI, Kolkata is working on the development of the first fs fiber laser in India which will be subsequently tested for its applicability in THz emission and detection by our team. Congratulations to all!

October 2023

1. Our work on Contribution of physical and system parameters in the determination of optical constants of thin solid phase samples using THz TDS has been accepted in Spectrochimica Acta A. Congratulations Khushboo! 

September 2023

1. Naini presented her results on Study of Minerals using Infrared and Terahertz Spectroscopy at the 48th IRMMW-THz conference at Montreal, Canada. Congratulations, Naini! 

August 2023

1. Khushboo and Diksha are awarded with the PhD certificate at the 53rd IIT Delhi convocation. One more round of congratulations to both of them!

July 2023

1. Aparajita presided over the Session Agri-Photonics I in the Optica Sensing Congress at Munich, DE. 

2. Khushboo presented her results on Investigation of Ultra-Low Frequency Vibrational Modes of 2:1 Urea-Succinic Acid Cocrystals at Optica Sensing Congress at Munich, DE, Congratulations, Khushboo!

3. Naini presented her results on Thermal Evolution of Rhodochrosite: Insights from Infrared and Terahertz Spectroscopy at Optica Sensing Congress at Munich, DE, Congratulations, Naini! 

4. Our work on Comprehensive spectral and imaging studies of marble to assess the environmental damage using ULF Raman and THz absorption studies has been accepted for Oral presentation at SPIE O3A (Optics for Art, Archaeology and Architecture) conference in Germany.

5. Work done by our MTech student on Investigation of Thermal Fatigue in Metals Using terahertz Imaging Technique was presented at Optica Sensing Congress at Munich, DE, Congratulations, Rohit! 

June 2023

1. Our work on Coherent terahertz laser feedback interferometry for hydration sensing in leaves has been accepted in Optics Express. This work was highlighted as the Editor's Pick of the month by the Journal. It was done as part of a big multi-institute international collaboration with Univ of Leeds, UK,  and University of Queensland, AU. 

2. Our work on Comprehensive spectral and imaging studies of marble to assess the environmental damage using ULF Raman and THz absorption studies has been accepted for Oral presentation at SPIE O3A (Optics for Art, Archaeology and Architecture) conference in Germany.

April 2023

1. Diksha Garg defends her PhD Dissertation on Optical Spectroscopy for Agri-Food applications successfully! Congratulations Dr Diksha Garg! She has moved on to University of Exeter, UK as a Post-Doctoral Research Fellow to work on THz Imaging for Biomedical Applications.

2. Our work on Orientational deformations leading to temperature-induced structural phase transition in Prehnite using Raman, Infrared, and Terahertz spectroscopy, has been accepted in Spectrochimica Acta A. Congratulations Naini!

March 2023

1. Our work on Growth and assessment of optical and non-linear optical properties of lithium sulphamate single crystal for optoelectronic applications,  has been accepted in J Mater Sci: Mater Electron. This work was done as part of a big collaboration with NPL, New Delhi.

2. Our work on Comparison of Physical and System Factors Impacting Hydration Sensing in Leaves Using Terahertz Time-Domain and Quantum Cascade Laser Feedback Interferometry Imaging, has been accepted in Sensors. This work was done as part of a big multi-institute international collaboration where Univ of Leeds, UK, University of Queensland, AU were involved. 

3. Puspita's work on Comprehensive spectral and imaging studies of marble to assess the environmental damage using ULF Raman and THz absorption studies has been accepted for Oral presentation at SPIE O3A (Optics for Art, Archaeology and Architecture) conference in Germany. 

February 2023

1. Uzair's work on Composite lens-based compact and lightweight handheld scanner for terahertz time-domain system  using 3D printers is accepted in SPIE Optical Engineering. Congratulations Uzair!

December 2022

1. Khushboo Singh defends her PhD Dissertation on Chemical Sensing using THz techniques successfully! Congratulations Dr Khushboo Singh! She continues her association with the group as a post doctoral scientist.

November 2022

1. Puspita Chanda is selected as a PMRF Fellow,  Congratulations Puspita!

September 2022

1. Diksha presented her results on Detection of Food Additives in Milk Powder using Raman Imaging at the ICO-OWLS-16 conference, Dresden, Germany. Congratulations, Diksha!

2.  Uzair presented his results on Dehydration of Agricultural Products using Reflection Optics based THz hydration sensor at the ICO-OWLS-16 conference, Dresden, Germany. Congratulations, Uzair!

3. Aparajita presented an invited talk  on Challenges of THz Spectroscopy and Imaging in Biological Applications at the ICO-OWLS-16 conference, Dresden, Germany

4. Amartya presented an invited talk  on Breaking Barriers in Optical Spectroscopy: Challenges of Experiments for Extreme Conditions at the ICO-OWLS-16 conference, Dresden, Germany

August 2022

1. Puspita Chanda joins the group as a PhD student in the UQIDAR program (joint program between University of Queensland and IIT Delhi. She will work on THz Spectroscopy and Imaging for Heritage Conservation Applications. Welcome Puspita!

2. Sqr Ldr Rohit Jain joins the group to work on his MTech project on Fatigue Estimation using THz radiation. Welcome Rohit!

July 2022

1. Amartya presided over two sessions (Mineral Extraction and Agri-Photonics) and led a panel discussion on Agri-photonics in the Optical Sensors and Sensing Congress at Vancouver, Canada

2. Team A & A visited the University of Alberta, Canada in relation to a collaborative 'SAFDAQ Alberta Innovates' project

May 2022

1. Uzair's work on The Effect of In-Fill Pattern of 3D Printed Diffractive Elements on Propagation of Terahertz Radiation has been accepted at the Applied Industrial Sensing Congress (Session on laser sensors), Vancouver, Canada. Congratulations Uzair!

2. Naini's work on THz-TDS measurements on Prehnite and related materials has been accepted in the Optical Sensors and Sensing Congress (Session on Mineral Extraction), Vancouver, Canada. Congratulations Naini!

3. Shreya Gupta, MTech (OE) IIST Trivandrum, joins the group as a Project Scientist - she will work on THz-TDS of different materials and optical pump-probe measurements. Welcome to the group, Shreya!

March 2022

1. Mayuri and Urbi leave us to join UQ (for the last year of their PhD) as part of the UQIDAR program. Bon Voyage M & U.

February 2022

1. Diksha presents her PhD synopsis on THz-TDS for Agri-Food Applications. 

2. ECOPS spectral engine based high speed THz-TDS system in installed in the lab

January 2022

1. Diksha's work on using building a multi-excitation based home-built ULF-Raman system is accepted in Journal of Raman Spectroscopy. Congratulations Diksha!

December 2021

1. Khushboo presents her PhD synopsis on Chemical Sensing using THz techniques. 

2. Khushboo's work on using THz-TDS and ULF-Raman techniques for measurements of chemicals is accepted in Spectrochimica Acta A. Congratulations Khushboo!

3. Naini Bajaj (PhD BARC Mumbai) joins the group as an Institute Post-Doctoral Fellow - she will work on THz-TDS and ULF Raman measurements on minerals. Welcome to the group, Naini!

November 2021

1. Khushboo's work on THz-TDS of polymer composites is accepted in Journal of Physics D. Congratulations Khushboo!

October 2021

1. Diksha's work on criticalities on THz-TDS measurements is accepted in Spectrochimica Acta A. Congratulations Diksha!

August 2021

1. Uzair successfully defends his PhD proposal on THz NEAR FIELD APPLICATIONS. Congratulations Uzair!

January 2021

1. Team A & A has written an Invited Review Article 'A Review of the Concept, Applications and Implementation Issues of THz Spectral Imaging Technique' in IETE Technical Review

September 2020

1. Uzair Aalam joins the group as a PhD student. Welcome to the group Uzair!

July 2020

1. Urbi has crossed the first 'milestone' of the UQIDAR program, and has defended her PhD proposal on IDENTIFICATION OF TRANSGENIC PLANT SPECIES USING THZ SPECTROSCOPY. Congratulations Urbi!

January 2020

1. Mayuri has crossed the first 'milestone' of the UQIDAR program, and has defended her PhD proposal on THz SPECTROSCOPY & IMAGING IN QUANTITATIVE ASSESSMENT IN PLANT HYDRATION. Congratulations Mayuri!

October 2019

1. Khushboo Singh is visiting University of Queensland @ Aleks Rakic lab to run some THz measurements using Quantum Cascade Lasers.

2. Team HiPSpec has written an article 'Advanced Spectroscopy in Precision Agriculture' in Optics and Photonics News, OPN, due to be published in the Nov 2019 issue.

September 2019

1. A CW THz system has been installed in the lab with frequency tuning between 0-2.7 THz.

June 2019

1. Khushboo Singh presented two papers on THz spectroscopy and sensing at the CLEO-Europe Conference in Munich, Germany.

April 2019

1. Urbi Kundu, a specialist and expert in DNA/RNA extraction and biochemicals has joined the group.

2. University of Queensland, Australia & IIT Delhi (UQIDAR) are inviting applications for a joint UQ-IITD PhD degree program . Three PhD student positions are available to work on very interesting societal impact projects in this joint program. For more project details and application procedure, log on to www.uqidar.org. Applications are due on APRIL 14, 2019.

January 2019

1. Mayuri Kashyap has joined as the first student in the Joint UQ-IITD PhD Program.

December 2018

1. 2 PhD positions are available within our group. Area(s) of Research: THz Spectroscopy & Imaging, Raman Spectroscopy in Condensed Matter Physics. Short-listed candidates can send me an email or meet me anytime between 8 am - 12.30 pm (Dec 4th, 2018) in my office.

2. A student from Central University of Karnataka will join the group from Dec 17th to work on her MSc project using Raman Spectroscopy.

November 2018

1. One Principal Project Scientist position is available with immediate effect. For details, log on to IRD website and search for Vacancy # IITD/IRD/229/2018. Applications are due on NOVEMBER 15, 2018.

October 2018

1. UQIDAR Applications Deadline EXTENDED TILL OCTOBER 31, 2018.

2. University of Queensland, Australia & IIT Delhi (UQIDAR) have initiated a joint UQ-IITD joint PhD degree program starting January 2019. Three PhD student positions are available to work on very interesting societal impact projects in this joint program. For more project details and application procedure, log on to www.uqidar.org. Applications are due on OCTOBER 28, 2018. 

3. Nitrogen gas purging system installed in the lab.

4. One Project Associate position is available with immediate effect. For details, log on to IRD website. Applications are due on OCTOBER 31, 2018.

September 2018

1. TeraFLASH - THz-TDS system installed in our HiPSpec Lab. This is the first pulsed time-domain system installed in India having an available bandwidth of > 6 THz.