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I will discuss progress in metamaterials including symmetry breaking related phenomena. I will also discuss non-Hermitian optics and parity-time symmetry and PT lasers of single mode.
In this talk I will present an array of fluorescence molecular imaging technologies for multi-scale imaging from microscopic to macroscopic scales. Specific methods include planar fluorescence imaging for macroscopic samples, fluorescence laminar optical tomography (LOT) for mesoscopic (millimeter scale) samples, and two-photon fluorescence microscopy for intravital microscopic imaging. In addition,...
Recent nano-fabrication developments enabled implementation of many nanophotonic techniques to macroscopic scales, which is crucial for many applications of interest (e.g. energy conversion, displays, lighting). Some exciting new opportunities in this area will be presented.
The evolution of three-wave mixing processes can be controlled with aperiodic QPM structures. We describe underlying concepts, engineering of spectral amplitude and phase, and adiabatic processes, illustrated with examples including few-cycle OPCPA, octave spanning frequency combs, and quantum frequency conversion.
I will discuss nonlinear interaction between THz light and matter. Especially, I will discuss the nonlinear response of infrared active phonons and superconducting plasmons in High Tc cuprates.
Metasurfaces enable new phenomena that are distinctly different from those observed in 3D metamaterials, providing us with unique capabilities to fully control wavefront and surface wave propagation with planar elements and thus realize “flat photonics”.
I review recent progress in chip-based nonlinear optics with a focus on emerging applications in quantum information processing, microwave photonics and midinfrared photonics.
Chalcogenide glass fibers offer a fruitful playground for mid-infrared nonlinear optics but are hampered by mechanical fragility and high chromatic dispersion. I review recent efforts on novel of chalcogenide fibers that address these perennial issues.
This talk will describe our programmes to scale diode pumped PW and parametric systems to high average power as a new basis for applications based on compact, efficient and reliable secondary sources.
Hybrid semiconductor-metal nanoparticles are of both fundamental and practical interest. CdSe semiconductor nanocrystal quantum dots (NQDs) are emissive following direct absorption of photons, while nanosized metal structures exhibit plasmonic absorption and light scattering. In a hybrid nanoscale architecture, both optical phenomena can be integrated as metal-semiconductor coupling via non-radiative...
More than 25 years ago, low temperature experiments aimed at establishing the ultimate limits to optical storage in solids led to the first optical detection and spectroscopy of a single molecule in the condensed phase. At this unexplored ultimate limit, many surprises occurred where single molecules showed both spontaneous changes (blinking) and light-driven control of emission, properties that were...
While quantum measurement has long been seen as a deep philosophical conundrum, technological progress and new potential applications such as quantum information processing have turned it into a respectable experimental discipline as well. I will introduce a modern perspective on real-world quantum measurement, including the new paradigm of "weak measurement" and its (controversial) potential...
The first demonstration of a cell laser in 2011 opened new avenues for generating coherent light from living matters. Here we show progress in this new class of light sources and demonstrate their applications for sensing.
We demonstrate a device that integrates a III-V semiconductor saturable absorber mirror with a graphene electro-optic modulator, which provides a monolithic solution to modelocking and noise suppression in a frequency comb.
Nanobeam laser with threshold 230 nW is demonstrated in continuous-wave operation at room-temperature. This is achieved by reducing the size of active medium to 1.5×0.3×0.02 μm3 via selective wet-etching of a single quantum well layer.
MIIPS is a popular method for compressing femtosecond pulses. It is not ideal for complex pulses, like those produced by self-phase modulation. We show that several limitations are fixed by an improvement called G-MIIPS.
We report an integrated graphene photodetector on top of a silicon waveguide with a maximum responsivity of 0.36 A/W and a 3dB high-speed cut-off frequency of 42 GHz. Furthermore, nonlinear photocurrent in graphene under pulse excitation enables direct on-chip characterization of ultrafast pulses.
A cross-correlation frequency-resolved optical gating is developed for the characterization of an optical pulse train consisting of monocycle pulses. An optical beat is employed for resolving the ultrafast temporal intensity variation in the train.
Dual-comb spectroscopy using electro-optic-modulator-based frequency combs broadened in a highly nonlinear fiber opens up new opportunities for analytical spectroscopy. One hundred thousand spectra per second are measurable with a 10-THz span and a 157-GHz resolution.
Waveguide-based, electro-optic modulators were used to generate pitch-agile, optical frequency combs from a single continuous-wave laser. These combs are then detected via a multiheterodyne approach where the absorption information is down-converted into the radiofrequency domain.
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