Abstract: Reading device for a lateral flow test strip. A reading device (26) for a lateral flow test strip (2) includes a sample receiving volume (27) disposed between first and second faces (28, 29) spaced apart in a first direction (z). The sample receiving volume (27) is configured to receive at least a portion of a lateral flow test strip (2) between the first and second faces (28, 29) such that a longitudinal axis of the lateral flow test strip (2) is aligned in a second direction (x) transverse to the first direction (z). The reading device (26) also includes a light emitter (32) arranged to illuminate a reading portion (34) of the sample receiving volume (27). The reading device (26) also includes a photodetector (37) arranged to receive light from the reading portion (34). A width of the reading portion (34) in the second direction (x) is greater than a width of a test region (5) of the lateral flow test strip (2) in the second direction (x).

Abstract: An analytical test device (12) includes one or more light emitters (13) configured to emit light within a first range of wavelengths (??a). The analytical test device (12) also includes one or more first photodetectors (14), each first photodetector (14) being sensitive to a second range of wavelengths (??b) around a first wavelength. The analytical test device (12) also includes one or more second photodetectors (15), each second photodetector (15) being sensitive to a third range of wavelengths (??c) around a second wavelength, the second wavelength being different to the first wavelength. The analytical test device (12) also includes a correction module (16) configured to receive signals (19, 20) from the first and second photodetectors (14, 15) and to generate a corrected signal (21) based on a weighted difference of the signals (19, 20) from the first and second photodetectors (14, 15).

Abstract: An analytical test device (i) includes two or more sets of emitters (2, 3, 98, 101), each set of emitters (2, 3, 98, 101) comprising one or more light emitters (2, 3, 98, 101) configured to emit light within a range around a corresponding wavelength. Each set of light emitters (2, 3, 98, 101) is configured to be independently illuminable. The test device (1) also includes one or more photodetectors (4) arranged such that light from each set of emitters (2, 3, 98, 101) reaches the photodetectors (4) via an optical path (7) comprising a sample receiving portion (8). The emitters (2, 3, 98, 101) and photodetectors (4) are configured such that, at the sample receiving portion (8) of the optical path (7), a normalised spatial intensity profile generated by each set of emitters (2, 3, 98, 101) is substantially equal to a normalised spatial intensity profile generated by each other set of emitters (2, 3, 98, 101).

Abstract: A polymer comprising a fluorescent light-emitting repeating unit comprising a group of formula ED-EA wherein ED is an electron-donating unit; EA is an electron-accepting unit; and a band gap EgCT of a charge-transfer state formed from the electron-donating unit and the electron-accepting unit is smaller than the bandgap of either the electron-accepting unit EgEA or that of the electron-donating unit EgED.

Abstract: A rectifier diode which does not emit light in operation comprises: an anode layer; a work function modification layer comprising a salt compound; an organic charge transport layer; an optional electron injection layer; and a cathode layer. Also provided is a method for producing the organic diode.

Abstract: A polymer comprising a fluorescent light-emitting repeating unit comprising a group of formula ED-EA wherein ED is an electron-donating unit; EA is an electron-accepting unit; and a band gap EgCT of a charge-transfer state formed from the electron-donating unit and the electron-accepting unit is smaller than the bandgap of either the electron-accepting unit EgEA or that of the electron-donating unit EgED.

Abstract: A non-linear optical device comprising a non-linear element made of a plasmonic material with a periodic structure having a period smaller than the wavelength of a non-linear process intrinsic to the plasmonic material. The plasmonic material is implemented as a gold film which is structured with a periodic array of asymmetric split ring slits. The metamaterial framework of the plasmonic material itself is used as the source of a strong and fast non-linearity. The cubic non-linear response is resonantly enhanced through the effect of the metamaterial structuring by more than two orders of magnitude and its sign and magnitude can be controlled by varying the metamaterial pattern.