Code: RIQ010

Keywords: Quantum Technology

Supervisor: Dr. Hashir Kuniyil 

Abstract: 

Team of scientists called  John Clauser, Michel Horne, Abner Shimony and Richards Holt (CHSH) proved entangled systems follow different laws of physics  that are strange for our worldly experience. This weird reality can be applied in modern problems that include quantum cryptography. The CHSH experimentally proved that quantum entanglement really exists in smaller scale objects and systems such as photons, electrons, etc.

The objective in this project is to simulate the CHSH system and find out if quantum entanglement violates the reality we are living in.

Code: RIQ009

Keywords: Quantum Technology

Supervisor: Dr. Hashir Kuniyil 

Abstract: 

Quantum computers will invoke security threats as it can break present day classical cryptography security protocols. Preparedness for such a threat is seen as a national priority by many countries in the world including India. Because a non security proof cryptosystem puts financial, military, data privacy and many other major sectors in danger of collapse. The solution for this upcoming problem can be using the very domain that invoked it; that is quantum mechanics. A polarization entangled source can be engineered to deviate such a threat.

Objective: Designing polarization entangled photon sources using many nonlinear crystals arranged in sequence. Phase correction will be done on Python programming that will finally lead to uncertain entangled polarization states famously called Bell’s state.

Code: RIQ008

Keywords: Quantum Technology

Supervisor: Dr. Hashir Kuniyil 

Abstract: 

Knowledge of the bandwidth of the entangled photons generated for quantum applications is important in filtering noise and increasing brightness of the source. Therefore, the bandwidth of the system needs to be analyzed before deploying a photonic quantum system. The major application area of this aspect is quantum lidar and quantum communication protocols.

In this project, we will generate and analyse the bandwidth of the entangled photon source generated in crytically and noncritically phase-matched nonlinear crystals. Python software and mathematical models will be used in simulating the system.

Code: RIQ007

Keywords: Quantum Technology

Supervisor: Dr. Hashir Kuniyil 

Abstract: 

Spatial properties of the entangled light source dictate performance of the quantum systems. For instance, a well prepared entangled source can improve resolution and contrast of quantum imaging systems. In photonic entangled systems, there are two fundamental spatial profiles called collinear and noncollinear geometry. One spatial profile is preferred over others depending on application. Therefore, designing desirable spatial modes in accordance with application is essential in entangled based systems.

Objective: design a spontaneous parametric downconversion system. Input beam profiles and nonlinear crystals properties are involved in the critical design stage.

We will focus on input parameters on system engineering on Phythod simulation.

Code: RIQ006

Keywords: Quantum Technology

Supervisor: Dr. Hashir Kuniyil 

Abstract: 

Spatiotemporal properties are important in several quantum based imaging schemes including quantum ghost imaging, spatiotemporaral imaging, imaging by undetected photons and understanding fundamentals of quantum mechanics such as delayed choice experiment. Quantum imaging systems are increasingly studied in recent years because of its potential to break the fundamental limits in conventional imaging schemes. A quantum imaging system can see finer details from a test sample with less noise leading to achieve a high quality image of the target with smaller details.

Objective of this project is to model a quantum imaging source in Python that exhibits quantum spatiotemporal coherence.

Code: RIQ005

Keywords: Quantum Technology

Supervisor: Dr. Hashir Kuniyil 

Abstract: 

Entangled photon pairs have several applications including photonic quantum sensing, quantum imaging. Quantum based modern technologies mostly rely on the entangled photon pairs generated by critically designed nonlinear optical media. Therefore, it is crucial in many quantum based photonic system applications to design nonlinear crystals according to targeted systems.

In this project, we aim to engineer nonlinear crystals using mathematical models simulated on Python with special focus on spectral properties of the entanglement photon pairs.

Code: RIP001  

Keywords: Numerical Study; Non-linear

Supervisor: Dr. A. K. Shafeeque Ali

Abstract: 

The concept of solicitor has gained attention in telecommunication technology and its dynamics in optical fibers and other nonlinear media has been extensively studied during the past few decades. The presence of such nonlinear waves has been studied analytically as well as numerically in nonlinear optics, plasma physics, fluid dynamics, nuclear physics, and biochemical systems, to name a few. However, there is still an extensive margin for improvement in the field of telecommunication. Advanced research in this area is highly preferable in current nonlinear physics. The nonlinear Schrödinger equation model (NLSE) is one of the most important and “universal” nonlinear models of modern science. At the low intensities of the optical field, the non-resonant nonlinearity in materials of practical interest resembles Kerr nonlinearity. However, as the incident field becomes stronger, optical fields whose frequencies approach a resonant frequency of the material, non-Kerr higher order nonlinearity comes into play, which essentially changes NLSE, and hence the physical features and the stability of optical soliton propagation. Here we study the propagation of highly intense laser beams in nonlinear optical media such as optical fiber, metamaterials, and fiber couplers. We will analyze the existence of exotic nonlinear phenomena such as modulation instability, supercontinuum generation, solitons, filamentation, and spatiotemporal light bullets. We adopt linear stability analysis, Lagrangian variational analysis, and numerical method based on the crank-Nicholson Scheme for our theoretical investigation. We explore the parametric region in which the above-mentioned nonlinear phenomenon can be observed and examine the critical conditions regarding system parameters

Code: RIP002  

Keywords: Plasmonics

Mentor: Dr. NAVAS M P

Abstract: 

The metal nanoparticles like gold, silver, etc., exhibit strong plasmon responses in the visible region of the electromagnetic spectrum. The plasmonic response can be controlled through different configuration, choice of plasmonic material and how the material is nanostructured and has significant implications on the ultimate performance of any plasmonic device. The objective of this project is to study the plasmonic response of various combination metal nanostructures using computational simulations. The performance of these nanostructures as a refractive index sensor will be studied.

Code: RIP003

Keywords: Metamaterials

Mentor: Dr. NAVAS M P

Abstract: 

Metamaterials are the artificially engineered structures, exhibit properties which cannot be obtained using natural materials. The metamaterials with properties that can be actively tuned is crucial for the development of various optics based equipment. The project is focused on designing of various metamaterials for optical applications. 

Code: RIP004

Keywords: Perfectly reflecting surfaces

Mentor: Dr. NAVAS M P

Abstract: 

A layer of dielectric materials deposited as a film can reflect up to 99.999% of light incident on it for a range of wavelengths. The range can be controlled by designing layer of materials with various thickness and size. 

The aim of this project is to optimize and design the all dielectric metasurfaces for achieving perfect reflection at visible wavelengths.