326 citations · 1.1k across the 27 of their papers we have counts for
27 papers
Straight Directional Couplers via Scan-Engineered Index Control
Mohan Wang, Martin J. Booth, Patrick S. Salter
A novel design for straight directional waveguide couplers and interferometers is demonstrated in glass, fabricated using femtosecond laser direct writing and operating at telecomm…
Laser written waveguides to the sample edge
Zhi-Kai Pong, Mohan Wang, Ji Qin +2
A method is presented for fabrication of femtosecond laser written waveguides in glass to remove the need for polishing of substrates after processing. It is shown that by amplitud…
Laser-written scalable sapphire integrated photonics platform
Mohan Wang, Patrick S. Salter, Frank P. Payne +3
In this paper, we demonstrate the integration of photonic devices on sapphire substrates using multi-layer depressed cladding waveguides at both 780 nm and 1550 nm. The devices are…
Polarization based modulation of splitting ratio in femtosecond laser direct written directional couplers
Zhi-Kai Pong, Bangshan Sun, Patrick S. Salter +1
This work characterizes a phenomenon in direct laser written directional couplers where the splitting ratio for output light is dependent on the input polarization state. In genera…
A reconfigurable arbitrary retarder array as complex structured matter
Chao He, Binguo Chen, Zipei Song +31
Tuneable retarder arrays, such as spatially patterned liquid crystal devices, have given rise to impressive photonic functionality, fuelling diverse applications ranging from micro…
High-precision optical fiber sensing beyond 1000°C
Mohan Wang, Patrick S. Salter, Frank P. Payne +10
Sapphire fiber can withstand around 2000°C, but it is multimoded, giving poor precision sensors. We demonstrate a single-mode sapphire fiber Bragg grating temperature sensor operat…
High Speed Precise Refractive Index Modification for Photonic Chips through Phase Aberrated Pulsed Lasers
Bangshan Sun, Simon Moser, Alexander Jesacher +3
Integrated photonic chips have significant potential in telecommunications, classic computing, quantum systems, and topological photonics. Direct laser writing offers unique capabi…
Additive GaN solid immersion lenses for enhanced photon extraction efficiency from diamond color centers
Xingrui Cheng, Nils Kolja Wessling, Saptarsi Ghosh +9
Effective light extraction from optically active solid-state spin centres inside high-index semiconductor host crystals is an important factor in integrating these pseudo-atomic ce…
Real-time adaptive estimation of decoherence timescales for a single qubit
Muhammad Junaid Arshad, Christiaan Bekker, Ben Haylock +12
Characterising the time over which quantum coherence survives is critical for any implementation of quantum bits, memories and sensors. The usual method for determining a quantum s…
Direct laser written aperiodic photonic volume elements for complex light shaping with high efficiency: inverse design and fabrication
Nicolas Barré, Ravi Shivaraman, Simon Moser +4
Light plays the central role in many applications. The key to unlocking its versatility lies in shaping it into the most appropriate form for the task at hand. Specifically tailore…
Single-mode sapphire fiber Bragg grating
Mohan Wang, Patrick S. Salter, Frank P. Payne +4
We present here the inscription of single-mode waveguides with Bragg gratings in sapphire. The waveguide Bragg gratings have a novel multi-layer depressed cladding design in the 15…
On-chip beam rotators, adiabatic mode converters, and waveplates through low-loss waveguides with variable cross-sections
Bangshan Sun, Fyodor Morozko, Patrick S. Salter +14
Photonics integrated circuitry would benefit considerably from the ability to arbitrarily control waveguide cross-sections with high precision and low loss, in order to provide mor…
Revealing complex optical phenomena through vectorial metrics
Chao He, Jintao Chang, Patrick S. Salter +17
Advances in vectorial polarisation-resolved imaging are bringing new capabilities to applications ranging from fundamental physics through to clinical diagnosis. Imaging polarimetr…
Microscopic processes during ultra-fast laser generation of Frenkel defects in diamond
Benjamin Griffiths, Andrew Kirkpatrick, Shannon S. Nicley +6
Engineering single atomic defects into wide bandgap materials has become an attractive field in recent years due to emerging applications such as solid-state quantum bits and senso…
Antimony thin films demonstrate programmable optical non-linearity
Zengguang Cheng, Tara Milne, Patrick Salter +4
The use of metals of nanometer dimensions to enhance and manipulate light-matter interactions for a range of emerging plasmonics-enabled nanophotonic and optoelectronic application…
Spinning Disk -- Remote Focusing Microscopy
Michele Gintoli, Sharika Mohanan, Patrick Salter +4
Fast confocal imaging was achieved by combining remote focusing with differential spinning disk optical sectioning to rapidly acquire images of live samples at cellular resolution.…
Laser writing of individual atomic defects in a crystal with near-unity yield
Yu-Chen Chen, Benjamin Griffiths, Laiyi Weng +11
Atomic defects in wide band gap materials show great promise for development of a new generation of quantum information technologies, but have been hampered by the inability to pro…
Three-dimensional solid-state qubit arrays with long-lived spin coherence
C. J. Stephen, B. L. Green, Y. N. D. Lekhai +11
Three-dimensional arrays of silicon transistors increase the density of bits. Solid-state qubits are much larger so could benefit even more from using the third dimension given tha…
Microscope calibration using laser written fluorescence
Alexander D. Corbett, Michael Shaw, Andrew Yacoot +5
There is currently no widely adopted standard for the optical characterisation of fluorescence microscopes. We used laser written fluorescence to generate two- and three-dimensiona…
High resolution structural characterisation of laser-induced defect clusters inside diamond
Patrick S. Salter, Martin J. Booth, Arnaud Courvoisier +2
Laser writing with ultrashort pulses provides a potential route for the manufacture of three-dimensional wires, waveguides and defects within diamond. We present a transmission ele…
Four-dimensional light shaping: manipulating ultrafast spatio-temporal foci in space and time
Bangshan Sun, Patrick S. Salter, Clemens Roider +5
Spectral dispersion of ultrashort pulses allows simultaneous focusing of light in both space and time creating so-called spatio-temporal foci. Such space-time coupling may be combi…
Femtosecond laser inscription of Bragg grating waveguides in bulk diamond
V. Bharadwaj, A. Courvoisier, T. T. Fernandez +7
Femtosecond laser writing is applied to form Bragg grating waveguides in the diamond bulk. Type II waveguides are integrated with a single pulse point-by-point periodic laser modif…
Inscription of 3D waveguides in diamond using an ultrafast laser
Arnaud Courvoisier, Martin J. Booth, Patrick S. Salter
Three dimensional waveguides within the bulk of diamond are manufactured using ultrafast laser fabrication. High intensities within the focal volume of the laser cause breakdown of…
Laser writing of coherent colour centres in diamond
Yu-Chen Chen, Patrick S. Salter, Sebastian Knauer +11
Optically active point defects in crystals have gained widespread attention as photonic systems that can find use in quantum information technologies. However challenges remain in…