Experimental realization of sensitivity enhancement and suppression with exceptional surfaces
arXiv:2009.06953 · doi:10.1002/lpor.202000569
Abstract
By preparing a sensor system around isolated exceptional points, one can obtain a great enhancement of the sensitivity benefiting from the non-Hermiticity. However, this comes at the cost of reduction of the flexibility of the system, which is critical for practical applications. By generalizing the exceptional points to exceptional surfaces, it has been theoretically proposed recently that enhanced sensitivity and flexibility can be combined. Here, we experimentally demonstrate an exceptional surface in a non-Hermitian photonic sensing system, which is composed of a whispering-gallery-mode microresonator and two nanofiber waveguides, resulting in a unidirectional coupling between two degenerate counter-propagating modes with an external optical isolator. The system is simple, robust, and can be easily operated around an exceptional surface. On the one hand, we observe sensitivity enhancement by monitoring the resonant frequency splitting caused by small perturbations. This demonstration of exceptional-surface-enhanced sensitivity paves the way for practical non-Hermitian sensing applications. On the other hand, we also show the suppression of frequency splitting around the exceptional surface for the first time.
arXiv comment12 pages, 4 figures. comments are welcome
References in corpus (25)
- Unidirectional Invisibility induced by PT-Symmetric Periodic Structures
- On-chip Single Nanoparticle Detection and Sizing by Mode Splitting in an Ultra-high-Q Microresonator
- Topological energy transfer in an optomechanical system with exceptional points
- Observation of parity-time symmetry breaking transitions in a dissipative Floquet system of ultracold atoms
- Enhanced sensitivity operation of an optical gyroscope near an exceptional point
- A hybrid on-chip opto-nanomechanical transducer for ultra-sensitive force measurements
- Observation of parity-time symmetry breaking in a single spin system
- Quantum state tomography across the exceptional point in a single dissipative qubit
- Observation of Parity-Time Symmetry in Optically Induced Atomic Lattices
- Non-Hermitian Ring Laser Gyroscopes with Enhanced Sagnac Sensitivity
- Electromagnetically induced transparency at a chiral exceptional point
- Sensing with exceptional surfaces: combining sensitivity with robustness
- Symmetry-protected nodal phases in non-Hermitian systems
- Cavity optomechanical transduction sensing of single molecules
- Topological exceptional surfaces in non-Hermitian systems with parity-time and parity-particle-hole symmetries
- Information Retrieval and Criticality in Parity-Time-Symmetric Systems
- Exceptional Surfaces in PT-Symmetric Photonic Systems
- Synthetic parity-time symmetry breaking in a single microcavity
- Observation of PT-symmetric quantum interference
- Entanglement and spin squeezing in non-Hermitian phase transitions
- Direct generation of tunable orbital angular momentum beams in microring lasers with broadband exceptional points
- Exceptional points of any order in a single, lossy, waveguide beamsplitter by photon-number-resolved detection
- Experimental observation of information flow in the anti--symmetric system
- Exceptional points-based optical amplifiers
- Polarization-Controlled Cavity Input-Output Relations
Cited by in corpus (21)
- Non-Hermitian Topology and Exceptional-Point Geometries
- Coherent and Dissipative Cavity Magnonics
- Linear response theory of open systems with exceptional points
- Response strengths of open systems at exceptional points
- Exceptional surface-enhanced Rotation Sensing with Robustness in an optical microcavity
- Experimental demonstration of phase-matching and Sagnac effect in a millimeter-scale wedged resonator gyroscope
- Revisiting the hierarchical construction of higher-order exceptional points
- The infinity-loop microresonator: A new integrated photonic structure working on an exceptional surface
- Dynamical encircling exceptional point in largely detuned multimode optomechanical system
- Optomechanically induced transparency and directional amplification in a non-Hermitian optomechanical lattice
- Simultaneous ground-state cooling of multiple degenerate mechanical modes through cross-Kerr effect
- Moving along an exceptional surface towards a higher-order exceptional point
- Tunable partial polarization beam splitter and optomechanically induced Faraday effect
- Anomalous spontaneous emission dynamics at chiral exceptional points
- Optomechanical compensatory cooling mechanism with exceptional points
- Recent advances in the combination of nonlinearity and exceptional points
- Topology and criticality in non-Hermitian multimodal optical resonators through engineered losses
- Simulation of exceptional-point systems on quantum computers for quantum sensing
- Interplay of Disorder and Point-Gap Topology: Chiral Modes, Localization and Non-Hermitian Anderson Skin Effect in One Dimension
- Third-order exceptional surface in a pseudo-Hermitian superconducting circuit
- Scalable higher-order exceptional surface with passive resonators