Optical Spectroscopy & Microscopy Course | NPTEL | Prof. Balaji Jayaprakash, IISc
Course Details
| Exam Registration | 55 |
|---|---|
| Course Status | Ongoing |
| Course Type | Elective |
| Language | English |
| Duration | 12 weeks |
| Categories | Biological Sciences & Bioengineering, Chemistry, Physics, Photonics |
| Credit Points | 3 |
| Level | Postgraduate |
| Start Date | 19 Jan 2026 |
| End Date | 10 Apr 2026 |
| Enrollment Ends | 02 Feb 2026 |
| Exam Registration Ends | 20 Feb 2026 |
| Exam Date | 24 Apr 2026 IST |
| NCrF Level | 4.5 — 8.0 |
Optical Spectroscopy and Microscopy: A 12-Week Journey into the Fundamentals of Measurement
In the modern research landscape, optical spectroscopy and microscopy are indispensable tools, driving discoveries across biology, chemistry, physics, and materials science. However, the widespread use of commercial "black-box" systems often leaves users with a limited understanding of the core principles that make these technologies work. This gap in knowledge can hinder innovation and the ability to push instruments to their technical limits.
To bridge this gap, the National Programme on Technology Enhanced Learning (NPTEL) presents a unique and comprehensive 12-week postgraduate course: "Optical Spectroscopy and Microscopy: Fundamentals of optical measurements and instrumentation." This course, instructed by Prof. Balaji Jayaprakash from the Indian Institute of Science (IISc) Bangalore, is designed to transform users into creators by providing a deep dive into both the theory and practical construction of scientific optical equipment.
About the Course Instructor: Prof. Balaji Jayaprakash
Prof. Balaji Jayaprakash brings a wealth of experience to this course. As an Assistant Professor at the Centre for Neuroscience, IISc, his research focuses on learning and memory. His extensive postdoctoral training includes work with Prof. Alcino Silva at UCLA and Prof. Timothy Ryan at Weill Cornell Medical College, following his Ph.D. in Chemistry from the Tata Institute of Fundamental Research (TIFR). This strong foundation in both fundamental science and cutting-edge neurobiological applications ensures the course content is both rigorous and relevant to real-world research challenges.
Course Philosophy: From Theory to Bench
This course moves beyond standard operation manuals. It is built on the philosophy that true mastery comes from understanding light-matter interaction at a fundamental level and then applying that knowledge to build and align instrumentation. You will learn not just how to use a spectrometer or microscope, but how the photons are generated, how they interact with your sample, and how the resulting signal is detected and processed.
The curriculum is meticulously structured to take you from quantum mechanical principles to hands-on lab sessions where you will build a functional spectrometer.
Detailed 12-Week Course Layout
Weeks 1-5: Quantum Foundations & Light-Matter Interaction
- Essential Quantum Mechanics: Uncertainty principle, measurement postulates, photon picture.
- Time-dependent perturbation theory, Fermi's Golden Rule, and transition probabilities.
- Origins of fluorescence, absorption/emission spectra, anisotropy, and FRET.
- Second quantization, Fock states, and diagrammatic approaches to light-matter interaction.
- Deep dive into the origins of spontaneous and stimulated emission.
Weeks 6-8: Laser Physics and Core Optics
- Laser principles: two, three, and four-level systems.
- Real-world laser characteristics: threshold, gain, CW/pulsed operation, Q-switching, mode-locking.
- Optical components: lenses, mirrors, gratings, prisms, filters. Efficiency calculations and alignment techniques.
Weeks 9-10: Hands-On Instrumentation & Detection
- Building a grating-based laser spectrometer in the lab. Calibration and acquisition of fluorescence spectra.
- Principles of photodetection: quantum efficiency, dynamic range, shot noise.
- Detector types: PMTs, photodiodes. Introduction to detection electronics (preamps, ADCs).
Weeks 11-12: Imaging & Advanced Microscopy
- Area detectors: CCDs, EMCCDs, sCMOS sensors. Key metrics like read noise and speed.
- Theory of image formation: widefield, brightfield, phase contrast, DIC, and fluorescence microscopy.
- Scanning systems: Gaussian beam propagation, optical resolution, confocal microscopy principles and lab characterization.
Who Should Enroll?
Intended Audience: This postgraduate-level course is ideal for students and researchers in Life Sciences, Photonics, Physics, Chemistry, and Instrumentation Engineering who wish to gain a profound, working knowledge of optical tools.
Prerequisites: A solid background in Applied Optics, Introductory Quantum Mechanics, and Mathematical Methods in Physics is recommended. NPTEL provides excellent introductory courses in these areas.
Industry Relevance & Support
The skills taught in this course are highly valued in both academia and industry. The curriculum is supported by leading companies in the optics and imaging sector, including:
- Carl Zeiss
- Leica Microsystems
- Olympus
- Nikon
- DSS Image Tech
- Holmarc
- Optica (formerly OSA)
Key Learning Outcomes
| Area | Skills Gained |
|---|---|
| Theoretical Foundation | Understand light-matter interaction from quantum principles to phenomenological models like Beer-Lambert law. |
| Laser Technology | Comprehend laser operation, characteristics, and the physics behind pulsed laser techniques. |
| Instrument Design | Learn to select, align optical components, and calculate system efficiency for optimal signal-to-noise ratio. |
| Hands-On Building | Gain practical experience in constructing, calibrating, and operating a functional optical spectrometer. |
| Detection & Imaging | Master the working principles of modern detectors and the core theories behind various microscopy modalities. |
Recommended Textbooks
- Optical Spectroscopy by Wolfgang Demtröder
- Quantum Electronics by Amnon Yariv
- Building Scientific Apparatus by John H. Moore, Christopher C. Davis, and Michael A. Coplan
Embark on this 12-week journey to demystify the instruments at the heart of modern science. Enroll in "Optical Spectroscopy and Microscopy" to move from being a user to becoming an innovator, equipped with the knowledge to understand, modify, and create the next generation of optical measurement tools.
Enroll Now →