Zero-Threshold PT-Symmetric Polariton-Raman Laser
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866916592706650112 |
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| author | Dhara, Avijit Das, Pritam Chakrabarty, Devarshi Ghosh, Kritika Chaudhuri, Ayan Roy Dhara, Sajal |
| author_facet | Dhara, Avijit Das, Pritam Chakrabarty, Devarshi Ghosh, Kritika Chaudhuri, Ayan Roy Dhara, Sajal |
| contents | Anisotropy endows topological aspects in optical systems and furnishes a platform to explore non-Hermitian physics, which can be harnessed for the polarization-selective amplification of light. Here, we show a zero-threshold Raman laser can be achieved in an anisotropic optical microcavity via polarization-controlled optical pumping. A loss-gain mechanism between two polarized Stokes modes arises naturally via polarization-dependent stimulated scattering and anisotropic Raman gain of the active layered material inside the microcavity. A Parity-Time (PT) symmetric Hamiltonian has been proposed to explain the emergence of a single polarization mode, essential for achieving a zero-threshold lasing condition. Additionally, intensity correlation measurements of the Stokes modes validate the coherence properties of the emitted light. Our realization of the zero-threshold Raman laser in anisotropic microcavity can open up a new research direction exploring non-Hermitian and topological aspects of light in anisotropic two-dimensional materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_17475 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Zero-Threshold PT-Symmetric Polariton-Raman Laser Dhara, Avijit Das, Pritam Chakrabarty, Devarshi Ghosh, Kritika Chaudhuri, Ayan Roy Dhara, Sajal Mesoscale and Nanoscale Physics Optics Quantum Physics Anisotropy endows topological aspects in optical systems and furnishes a platform to explore non-Hermitian physics, which can be harnessed for the polarization-selective amplification of light. Here, we show a zero-threshold Raman laser can be achieved in an anisotropic optical microcavity via polarization-controlled optical pumping. A loss-gain mechanism between two polarized Stokes modes arises naturally via polarization-dependent stimulated scattering and anisotropic Raman gain of the active layered material inside the microcavity. A Parity-Time (PT) symmetric Hamiltonian has been proposed to explain the emergence of a single polarization mode, essential for achieving a zero-threshold lasing condition. Additionally, intensity correlation measurements of the Stokes modes validate the coherence properties of the emitted light. Our realization of the zero-threshold Raman laser in anisotropic microcavity can open up a new research direction exploring non-Hermitian and topological aspects of light in anisotropic two-dimensional materials. |
| title | Zero-Threshold PT-Symmetric Polariton-Raman Laser |
| topic | Mesoscale and Nanoscale Physics Optics Quantum Physics |
| url | https://arxiv.org/abs/2305.17475 |