Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2310.14210 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916109191479296 |
|---|---|
| author | Modak, Niladri Ashutosh, Swain Guchhait, Shyamal Ghosh, Sayan Dhara, Ritwik Nayak, Jeeban Kumar Das, Sourin Ghosh, Nirmalya |
| author_facet | Modak, Niladri Ashutosh, Swain Guchhait, Shyamal Ghosh, Sayan Dhara, Ritwik Nayak, Jeeban Kumar Das, Sourin Ghosh, Nirmalya |
| contents | Despite its non-Hermitian nature, the transverse optical beam shift exhibits both real eigenvalues and non-orthogonal eigenstates. To explore this unexpected similarity to typical PT (parity-time)-symmetric systems, we first categorize the entire parametric regime of optical beam shifts into Hermitian, PT-unbroken, and PT-broken phases. Besides experimentally unveiling the PT-broken regime, crucially, we illustrate that the observed PT-transition is rooted in the momentum-domain inhomogeneous polarization transformation of the beam. The correspondence with a typical non-Hermitian photonic system is further established. Our work not only resolves a longstanding fundamental issue in the field of optical beam shift but also puts forward the notion of novel non-Hermitian spin-orbit photonics: a new direction to study non-Hermitian physics through the optical beam shifts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_14210 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Inhomogeneous Polarization Transformation Reveals PT-Transition in non-Hermitian Optical Beam Shift Modak, Niladri Ashutosh, Swain Guchhait, Shyamal Ghosh, Sayan Dhara, Ritwik Nayak, Jeeban Kumar Das, Sourin Ghosh, Nirmalya Optics Quantum Physics Despite its non-Hermitian nature, the transverse optical beam shift exhibits both real eigenvalues and non-orthogonal eigenstates. To explore this unexpected similarity to typical PT (parity-time)-symmetric systems, we first categorize the entire parametric regime of optical beam shifts into Hermitian, PT-unbroken, and PT-broken phases. Besides experimentally unveiling the PT-broken regime, crucially, we illustrate that the observed PT-transition is rooted in the momentum-domain inhomogeneous polarization transformation of the beam. The correspondence with a typical non-Hermitian photonic system is further established. Our work not only resolves a longstanding fundamental issue in the field of optical beam shift but also puts forward the notion of novel non-Hermitian spin-orbit photonics: a new direction to study non-Hermitian physics through the optical beam shifts. |
| title | Inhomogeneous Polarization Transformation Reveals PT-Transition in non-Hermitian Optical Beam Shift |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2310.14210 |