A5049271597- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Laser-Matter Interactions and Applications
- Photonic and Optical Devices
- Gas Sensing Nanomaterials and Sensors
- Advanced Fiber Optic Sensors
- Graphene research and applications
- Analytical Chemistry and Sensors
- Nanomaterials and Printing Technologies
- Photonic Crystals and Applications
- Nanowire Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Advanced Sensor and Energy Harvesting Materials
- Optical Network Technologies
- Advanced Electron Microscopy Techniques and Applications
- Solid State Laser Technologies
- Advanced Memory and Neural Computing
- Gold and Silver Nanoparticles Synthesis and Applications
- Solar-Powered Water Purification Methods
- Near-Field Optical Microscopy
- 2D Materials and Applications
- Electronic and Structural Properties of Oxides
- Mechanical and Optical Resonators
- Metamaterials and Metasurfaces Applications
- Photochromic and Fluorescence Chemistry
University of Cambridge
2017-2025
Miniaturizing spectrometers Spectroscopy is a ubiquitous characterization tool spanning most scientific and many industrial disciplines. Most handheld are based on tabletop optical components, which limits the scale to these can be shrunk. To address desire for miniaturized with micrometer-scale (and smaller) footprint, Yang et al. developed such microspectrometer single, compositionally engineered nanowire. This result practical step forward use of other light-sensitive nanomaterials...
Abstract Black phosphorus is a two-dimensional material of great interest, in part because its high carrier mobility and thickness dependent direct bandgap. However, instability under ambient conditions limits deposition options for device fabrication. Here we show black ink that can be reliably inkjet printed, enabling scalable development optoelectronic photonic devices. Our binder-free suppresses coffee ring formation through induced recirculating Marangoni flow, supports excellent...
Abstract Graphene‐based organic nanocomposites have ascended as promising candidates for thermoelectric energy conversion. In order to adopt existing scalable printing methods developing thermostable graphene‐based devices, optimization of both the material ink and properties resulting films are required. Here, inkjet‐printed large‐area flexible graphene thin with outstanding reported. The thermal electronic transport reveal so‐called phonon‐glass electron‐crystal character (i.e., electrical...
A binary solvent ink exploiting solutal Marangoni flows to suppress the coffee-ring effect for uniform printing of 2D crystals.
We demonstrate a long-term stable, all-fiber, erbium-doped femtosecond laser mode-locked by black phosphorus saturable absorber. The absorber, fabricated scalable and highly controllable inkjet printing technology, exhibits strong nonlinear optical response is stable for operation against intense irradiation, overcoming key drawback of this material. oscillator delivers self-starting, 102 fs pulses centered at 1555 nm with 40 spectral bandwidth. This represents the shortest pulse duration...
Abstract Ultrafast lasers with tunable parameters in wavelength and time domains are the choice of light source for various applications such as spectroscopy communication. Here, we report a pulse-duration mode-locked Erbium doped fiber laser single wall carbon nanotube-based saturable absorber. An intra-cavity filter is employed to continuously tune output 34 nm (from 1525 1559 nm) pulse duration from 545 fs 6.1 ps, respectively. Our results provide novel requiring variable or duration.
Conventional spectrometer designs necessitate a compromise between their resolution and sensitivity, especially as device detector dimensions are scaled down. Here, we report on miniaturizable platform where light throughput onto the is instead enhanced increased. This planar, CMOS-compatible based around metasurface encoders designed to exhibit photonic bound states in continuum, operational range can be altered or extended simply through adjusting geometric parameters. system enhance...
Abstract Early diagnosis in exhaled breath is a key technology for next-generation personal healthcare monitoring. Current chemiresistive sensors, primarily based on metal oxide (MOx) thin films, have limited applicability such portable systems due to their high power consumption, long recovery time, poor device-to-device consistency, and baseline drifts. To address these challenges ammonia ( $${{\rm{NH}}}_{3}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow>...
Abstract The burgeoning field of computational spectrometers is rapidly advancing, providing a pathway to highly miniaturized, on-chip systems for in-situ or portable measurements. performance these typically limited in its encoder section. response matrix largely compromised with redundancies, due the periodic intensity overly smooth responses. As such, inherent interdependence among physical size, resolution, and bandwidth spectral encoders poses challenge further miniaturization progress....
We demonstrate a compact, all-fiber-integrated laser system that delivers Raman solitons with duration of ∼100 fs and pulse energy up to 13.3 nJ, continuously wavelength tunable from 1.98 2.29 µm via Raman-induced soliton self-frequency shift (SSFS) in thulium-doped fiber amplifier. realize >90% efficiency conversion, the highest reported value SSFS-based sources, best our knowledge. This enables us achieve >10 nJ 2.16 range, demonstrated above 2.22 an SSFS-assisted, all-fiber...
We report high-energy mid-infrared pulse generation by Q-switching of dysprosium-doped fiber lasers for the first time. Two different modulation techniques are demonstrated. Firstly, using active acousto-optic modulation, pulses produced with up to 12 μJ energy and durations as short 270 ns, variable repetition rates from 100 Hz 20 kHz central wavelengths tunable 2.97 3.23 μm. Experiments supported numerical modeling, identifying routes improved energies avoid multi-pulsing careful choice...
Abstract Black phosphorus (BP) attracts huge interest in photonic and optoelectronic applications ranging from passive switch for ultrafast lasers to photodetectors. However, the instability of chemically unfunctionalized BP ambient environment due oxygen moisture remains a critical barrier its potential applications. Here, parylene-C layer was used protect inkjet-printed BP-saturable absorbers (BP-SA), efficacy this passivation demonstrated on stable continuous operation BP-SA harsh...
We present a high-throughput method for identifying and characterizing individual nanowires automatically designing electrode patterns with high alignment accuracy. Central to our is an optimized machine-readable, lithographically processable, multi-scale fiducial marker system─dubbed LithoTag─which provides nanostructure position determination at the nanometer scale. A grid of uniquely defined LithoTag markers patterned across substrate enables image mapping in 100% set >9000 scanning...
Solution processing-based fabrication techniques such as liquid phase exfoliation may enable economically feasible utilization of graphene and related nanomaterials in real-world devices the near future. However, measurement thickness thin film structures fabricated by these approaches remains a significant challenge. By using surface plasmon resonance (SPR), simple, accurate, quick deposited for inkjet-printed films is reported here. We show that SPR technique convenient well-suited...
Optical spectroscopy plays an essential role across scientific research and industry for non-contact materials analysis1-3, increasingly through in-situ or portable platforms4-6. However, when considering low-light-level applications, conventional spectrometer designs necessitate a compromise between their resolution sensitivity7,8, especially as device detector dimensions are scaled down. Here, we report on miniaturizable platform where light throughput onto the is instead enhanced...
We demonstrate a long-term stable fiber laser mode-locked by solution deposited and encapsulated black phosphorus (BP) saturable absorber. Our work highlights the potential of BP-based devices for photonic applications when operating under ambient conditions.
We demonstrate an inkjet-printed temperature- and humidity-resistant black phosphorus saturable absorber, enabling stable continuous mode-locking over 210 hours. Our work highlights the potential of BP-based devices for photonic applications operating under challenging environmental conditions.
We demonstrate a wideband tunable, ultrafast fiber laser mode-locked by using solution deposited and encapsulated black phosphorus (BP) saturable absorber. Stable, picosecond pulses, tunable from 1535 nm to 1565 are generated.
We demonstrate an all-fiber erbium-doped laser mode-locked by inkjet-printed black phosphorus saturable absorber, delivering 102 fs pulses with 40 nm spectral width. Our work highlights the potential of BP-based devices for future photonic technologies.
Magnetic field-driven insulating states in graphene are associated with samples of very high quality. Here, this state is shown to exist monolayer grown by chemical vapor deposition (CVD) and wet transferred on Al2O3 without encapsulation hexagonal boron nitride (h-BN) or other specialized fabrication techniques superior devices. Two-terminal measurements performed at low temperature using a GaAs-based multiplexer. During high-throughput testing, properties found 10 μm long device which wide...
Miniaturized spectrometry system is playing an essential role for materials analysis in the development of in-situ or portable sensing platforms across research and industry. However, there unavoidably exists trade-offs between resolution operation bandwidth as device scale down. Here, we report extreme miniaturized computational photonic molecule (PM) spectrometer utilizing diverse spectral characteristics mode-hybridization effect split eigenfrequencies super-modes, which effectively...
We demonstrate a wavelength tunable dual-wavelength fiber laser using black phosphorus (BP) saturable absorber. By controlling the filter together with polarization controller to adjust intra-cavity birefringence, pulses from 1532 nm 1545 are observed.
We report self-starting mode-locking in all-fiber erbium-doped lasers utilizing inkjet-printed transition metal dichalcogenide saturable absorbers, exhibiting highly optical uniformity, with <5% standard deviations.