2nd SmoleQ Greeting Seminar (2024.11.26 at 17:00 (JST))

 

Speaker: 

Abhisek Sinha

Title: 

Interaction of Orbital Angular Momentum of Light with Matter at Various Scales.

Abstract:

Light can carry orbital angular momentum (OAM) in addition to spin, offering an extra degree of freedom for information transfer. Achieving this, however, depends on efficiently transferring OAM to matter. Fundamentally, studying OAM-matter interactions could deepen our understanding of the physical nature of the OAM of light. In our experiments with in-house built setups, like a reaction microscope, we explored OAM transfer to cold atomic jets. Results indicate that OAM transfer is highly influenced by the target's radial position. This kind of precise targeting was achieved using nanometric tips, which yielded promising results.

References:

[1] Sinha, A., Sen, A., Sen, S., Sharma, V., & Gopal, R. (2024). Photoelectron momentum distribution in structured strong fields. Journal of Physics B: Atomic, Molecular and Optical Physics, 57(23), 235001.

[2] Sen, A., Sinha, A., Sen, S., Sharma, V., & Gopal, R. (2022). Above-threshold ionization of argon with ultrashort orbital-angular-momentum beams. Physical Review A, 106(2), 023103.

[3] Sinha, A., Rajak, D., Rani, S., Gopal, R., & Sharma, V. (2021, November). Interaction of Twisted Light with Metal Tips. In Laser Science (pp. JTu1A-22). Optica Publishing Group.