A5008333125- Graphene research and applications
- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Diamond and Carbon-based Materials Research
- 2D Materials and Applications
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Nanowire Synthesis and Applications
- Photonic Crystals and Applications
- Semiconductor Quantum Structures and Devices
- Boron and Carbon Nanomaterials Research
- Analytical Chemistry and Sensors
- Thermal Radiation and Cooling Technologies
- MicroRNA in disease regulation
- Ga2O3 and related materials
- Topological Materials and Phenomena
- Porphyrin and Phthalocyanine Chemistry
- Photorefractive and Nonlinear Optics
- Molecular Junctions and Nanostructures
- Quantum Information and Cryptography
- Fullerene Chemistry and Applications
- Advanced MEMS and NEMS Technologies
- Advanced Sensor and Energy Harvesting Materials
Nanyang Technological University
2021-2025
Fujian Medical University
2019
Second Affiliated Hospital of Fujian Medical University
2019
Abstract Despite the potential of graphene for building a variety quantum photonic devices, its centrosymmetric nature forbids observation second harmonic generation (SHG) developing second-order nonlinear devices. To activate SHG in graphene, extensive research efforts have been directed towards disrupting graphene’s inversion symmetry using external stimuli like electric fields. However, these methods fail to engineer lattice symmetry, which is root cause forbidden SHG. Here, we harness...
Two-dimensional (2D) materials have emerged as promising candidates for next-generation integrated single-photon emitters (SPEs). However, significant variability in the emission energies presents a major challenge producing identical single photons from different 2D SPEs, which may become crucial practical quantum applications. Although various approaches to dynamically tuning of SPEs been developed address issue, solution matching multiple individual is still scarce. In this work, we...
The creation of pseudo-magnetic fields in strained graphene has emerged as a promising route to allow observing intriguing physical phenomena that would be unattainable with laboratory superconducting magnets. Scanning tunneling spectroscopy experiments have successfully measured the pseudo-Landau levels and proved existence various systems. These giant observed highly deformed can substantially alter optical properties beyond level feasible an external magnetic field, but experimental...
Two-dimensional (2D) materials-based photodetectors in the infrared range hold key to enabling a wide of optoelectronics applications including imaging and optical communications. While there exist 2D materials with narrow bandgap sensitive photons, two-photon absorption (TPA) process can also enable photodetection well-established large bandgaps such as WSe2 MoS2. However, most TPA suffer from low responsivity, preventing this method being widely adopted for photodetection. Herein, we...
Abstract Single-photon emitters (SPEs) hold the key to many quantum technologies including computing. In particular, developing a scalable array of identical SPEs can play an important role in preparing single photons – crucial resources for computation at high rate, allowing improve computational capacity. Recently, different types have been found various 2D materials. Towards realizing SPE arrays materials computation, it is required develop tunable that produce by precisely controlling...
Background: Circulating microRNAs (miRNA) are steady preserved in blood plasma. Multiple evidences have shown that miRNAs play a crucial role cardiovascular disease including miRNA-378, which has been illustrated to participate diverse physiological and pathological processes of disease. In the present study, we aim explore expression plasma miRNA-378 its clinical significance patients with coronary artery (CAD).Methods: MiRNA-378 was performed by quantitative real-time PCR (qRT-PCR) 215 CAD...
Strain-engineered graphene has garnered much attention recently owing to the possibilities of creating substantial energy gaps enabled by pseudo-magnetic fields (PMFs). While theoretical works proposed possibility large-area PMFs straining monolayer along three crystallographic directions, clear experimental demonstration such promising devices remains elusive. Herein, we experimentally demonstrate a triaxially strained suspended structure that potential possess large-scale and quasi-uniform...
Quantum photonic circuits have recently attracted much attention owing to the potential achieve exceptional performance improvements over conventional classical electronic circuits. Second-order χ(2) nonlinear processes play an important role in realization of several key quantum components. However, their centrosymmetric nature, CMOS-compatible materials including silicon (Si) and germanium (Ge) traditionally do not possess response. Recently, second-harmonic generation (SHG) that requires...
The second-order $\chi^{2}$ process underpins many important nonlinear optical applications in the field of classical and quantum optics. Generally, manifests itself only a non-centrosymmetric dielectric medium via an anharmonic electron oscillation when driven by intense field. Due to inversion symmetry, group-IV semiconductors like silicon (Si) germanium (Ge) are traditionally not considered as ideal candidates for optics applications. Here, we report experimental observation...
Ultrafast light emission from monolayer graphene shows attractive potential for developing integrated sources next-generation graphene-based electronic-photonic circuits. In particular, operating at the telecom wavelengths are highly desired implementation of ultrahigh-speed optical communication. Currently, most studies on ultrafast have been performed in visible spectrum, while remain scarce. Here, we present experimental observations strong thermal wafer-scale graphene. Our results show...
Two-dimensional (2D) materials have emerged as promising candidates for next-generation integrated single-photon emitters (SPEs). However, significant variability in the emission energies of 2D SPEs presents a major challenge producing identical single photons from different SPEs, which may become crucial various quantum applications including information processing. Although approaches to dynamically tuning been developed address issue, practical solution matching multiple individual flake...
Forming single-photon emitters (SPEs) in insulating hexagonal boron nitride (hBN) has sparked wide interests the quantum photonics. Despite significant progress, it remains challenging to deterministically create SPEs at precise locations with a specific type of element for creating defects. In this study, we present straightforward approach generate site-deterministic carbon-functionalized hBN by harnessing ultrasonic nanoindentation. The obtained are high-quality and can be scaled up large...
The photonics-based approach has recently become a strong candidate for realising large-scale, practical quantum processor. Particularly in recent years, two-dimensional (2D) materials have developing an ideal integrated light source owing to their several unique advantages such as convenient on-chip integration. In this work, we study the effect of strain on emission wavelength and carrier lifetime. We first show that geometry stressors can adjust amount wavelength. Using engineering...
We present a strain engineering platform that allows the dynamic tuning of emission wavelength monolayer WSe<sub>2</sub>. A large and localized was induced in 2D materials by patterning photoresist layer with internal stress into two elliptical shapes finite gap between, which is referred to as dimer this work. By applying laser annealing on stressor while monitoring exciton emission, we demonstrate capability dynamically tune bright
Despite its superior physical properties, graphene's optical properties still possess crucial drawbacks for both classical and quantum photonics applications. For example, gapless band structure prohibits efficient light emission, while centrosymmetric nature renders it impossible to obtain strong second-order nonlinearity. In this work, we discuss our latest results on strained graphene that provides a new pathway towards solving the two key above-mentioned problems.
We enable second harmonic generation in pseudo-Landau quantized graphene that achieves strong strain-induced sublattice polarization. A temperature-dependent behavior of the observed is attributed to resonant optical transitions between discrete levels.
Pseudo-magnetic field in strained graphene has emerged as a promising route to allow observing intriguing physical phenomena that would be inaccessible with laboratory superconducting magnets. However, experimental observation of the impact pseudo-magnetic on optical and electrical properties remained unknown. Here, using time-resolved infrared pump-probe spectroscopy, we provide unambiguous evidence slow carrier dynamics enabled by giant (~100 T) periodically graphene. Our finding presents...
The potential for establishing energy gaps by pseudo-magnetic fields in strain-engineered graphene has sparked much interest recently. However, the limited sizes of induced and complicated platforms straining have thus far prevented researchers from harnessing unique optoelectronic devices. In this work, we present an experimental demonstration triaxially strained suspended structures capable obtaining quasi-uniform over a large scale. novel metal electrode design functions as both stressors...
We report broadband ultrafast photoluminescence from graphene ranging visible to telecom wavelengths. show strongly modified emission spectra owing the presence of cavity effect and demonstrate improved thermal stability enabled by hBN.
We experimentally demonstrate that strong pseudo-magnetic fields in strained graphene significantly modify the hot carrier dynamics. also theoretically propose pseudo-Landau-quantized may serve as an excellent gain medium for integrated lasers.
Second-order nonlinear χ 2 processes hold the key to realizing various promising classical and quantum applications. Only conventional non-centrosymmetric materials like aluminium nitride (AlN) lithium niobate (LN) exhibit a strong second-order nonlinearity. While germanium (Ge) has advantage of mature foundry processing due its complementary metal-oxide-semiconductor (CMOS) compatibility compared materials, it weak nonlinearity owning inversion symmetry. It is predicted that exploiting...