READ ME File For 'Diamond fs cohernet control dataset' Dataset DOI: 10.5258/SOTON/D0197 This dataset supports the publication: Karvounis, A., Nalla, V., MacDonald, K., & Zheludev, N. (2018). Ultrafast coherent absorption in diamond metamaterials. in Advanced Materials. Contents +++++++++ This research data description should be read and understood in the context of the corresponding manuscript. The figure numbers correspond to the figure numbers of the manuscript and the data corresponds to the data as shown in the figures. The figure descriptions as given in the corresponding manuscript are given below. The excel spreadheet contains the data for figures 1, 3, and 4. [Figure 2 is a schematic diagram only; Figure 5 contains results from a numerical model fully described in the manuscript text] Figure 1. Diamond membrane metamaterial. (a) Scanning electron microscope image of nano-hole array metamaterial, viewed from the front side as defined in panel (b). The inset shows four unit cells of the array at higher magnification [100 nm scale bar]. (b) Schematic cross-section of a metamaterial unit cell [period 500 nm], nominally along line AB in panel (a), with dimensions annotated in nanometres. (c, d) Solid lines - spectral dispersion of normal incidence reflection R, transmission T and absorption A [=1-{R + T}] for the diamond metamaterial measured using a microspectrophotometer for (c) front and (d) back illumination as defined in panel (b); Dashed lines – numerically simulated metasurface absorption spectra. Dotted lines in panel (c) – measured spectra for the unstructured diamond membrane. (e, f) Numerically simulated field maps showing the distribution of the z-component of electric field in the x-y plane at the midpoint of the membrane in the z direction, at a wavelength of 780 nm. Overlaid arrows indicate the direction and magnitude of electric displacement. Figure 3. Ultrashort pulse modulation using a diamond metamaterial. (a) Dependence of output power in channels 1 and 2 [orange and black lines respectively, relative to input power per channel] on the z-position [as defined in Figure 2] of the metamaterial, i.e. on the temporal delay between counter-propagating incident 6 fs pulses at a center wavelength ?c = 780 nm. (b) Coherent modulation depth as a function of pulse duration for the diamond metamaterial [filled circles] and for the unstructured diamond membrane [triangles], and for the former the phase difference between output channels 1 and 2 [open circles]. Figure 4. Ultrashort pulse modulation using a diamond metamaterial – spectral dispersion. Dependence of coherent modulation depth on center wavelength for pulse durations of 6 fs [square symbols] and 50 fs, at a fixed fluence of 0.4 nJ/cm2, overlaid with the single-beam absorption spectrum for 50 fs pulses illuminated from the front, evaluated as 1-{R + T} when blocking one of the two pulsed input beams [whereby one of the output channels records reflection and the other transmission]. Geographic location of data collection: University of Southampton, U.K. Related projects: Physics & Tech of Photonic Metadevices & Metasystems Hayden, B., Richardson, D., Zheludev, N., Plum, E. & Muskens, O. EPSRC EP/M009122/1 Dataset available under a CC BY 4.0 licence Publisher: University of Southampton, U.K. Date: January 2018