We experimentally resolve the time delay of electron wave packets arising from one- photon transitions in the continuum. This allows us to determine and quantify the angular momentum dependence of the photoionization time delay.
Single sensor-based, one-shot multispectral imaging beyond the visible region is rapidly emerging. We present a multispectral filter array in thermal wavelengths using aluminum infrared plasmonics on germanium substrate and illustrate its spectral performance.
We demonstrate tungsten based spectrally selective structures stable up to 1400 °C for thermophotovoltaic applications. Tungsten-hafnia multilayer metamaterials and tungsten-zirconia photonic crystal structures are presented.
We harness the near-field enhancement of plasmonic metamaterials to probe the electro-optic response from 50nm BaTiO 3 nanoparticles, with low actuation voltage <; 8V and modulation speeds up to MHz regime, in the near-infrared.
We show two functionalities of GaAs nanowires to control the second harmonic generation: beam steering up to 30° in sliced nanoantenna and three orders of magnitude enhancement within 3% stretching in mechanically tunable metamaterials.
We experimentally generate various spatial modes (e.g. optical vector or vortex beams) from a coherently-combined 7-core Er/Yb-doped multicore fiber amplifier through control of the amplitude, phase and polarization state of the individual core beams.
The ground state of electromagnetic radiation is characterised by a fluctuating electromagnetic field even in a vacuum. We measure its correlation function as a function of time and space using the electro-optic effect. We determine the spectral content and the amplitude of this state and find excellent agreement with the second quatisation theory. Finally, we discuss the potential of recent electro-optic quantum coherent interfaces for cavity electrodynamics experiments in the terahertz.
We present a detailed frequency noise characterization of a mid-infrared QCL comb with separate investigations of an optical line, the mode spacing and the offset frequency, and show strong anti-correlation between the two free-running comb parameters.
The paper presents a polarization independent and incident angle insensitive CMY colour filter mosaic made of nanorods with high transmission suitable for integration on a CMOS sensor for making CMY cameras.
We investigate the effects of ridge width on the characteristics of quantum cascade laser frequency combs and study how to achieve optimal performance. Very narrow ridges lead to much broader lasing spectra but also result in weaker comb stability.
In this paper, we review the work we have done to improve the performance of users located at the cell boundary of a 60 GHz radio-over-fibre fronthaul using coordinated-multipoint (CoMP) together with non-orthogonal-multiple-access (NOMA).
We experimentally demonstrate the selective amplification of structured light beams with >10W of output power for ~150 picosecond pulses in a few-mode Yb-doped large mode area fiber based Master Oscillator Power Amplifier (MOPA).
We analyze the topological charge of photonic crystal modes that have polarization properties dictated by their non-trivial envelopes, and demonstrate experimentally their lasing operation in electrically pumped mid-infrared photonic crystal lasers with high slope efficiency.
Complex “wavy” surfaces cannot be easily fabricated, frustrating the design and implementation of sophisticated diffractive optics. We will discuss a simple but powerful approach that provides surfaces containing an arbitrary number of specified spatial frequencies.
Blended learning offers substantial benefits for both teachers and students, and leads to more rigorous, challenging, engaging, and thought-provoking learning experiences. In this chapter a model of blended learning, the Digitally-Integrated Fieldtrip Inventory (DIFI) is presented. Like the Learner-Integrated Field Trip Inventory (LIFTI) described in Chapter 3, the DIFI comprises Procedural, Social & Cognitive components, all of which must be present in order to maximize the integration of different types of learning.
If learning is to occur during Learning Experiences outside Schools (LEOS), good pre-, during-, and post-visit planning is essential. In this chapter it is argued LEOS should complement, not replace, in-class/school learning, and should integrate formal, informal, and non-formal learning, in order to enhance learning outcomes.
In this chapter lesson plans are provided for a topic related to astronomical cycles, covering the Concept, Task, and Pedagogy to be used. The topic was 'Demonstrate understanding of the effects of astronomical cycles on planet Earth', and the LEOS trip was to a planetarium. The lesson plans include details of pre-, during- and post-visit activities for teachers, students and ISI staff.
