Figure 2From: Single molecule DNA detection with an atomic vapor notch filter Relevant spectra. (a) Emission spectra of the dye Atto 590 under illumination with laser light at 589 nm, filtered solely with a hot (200°C) atomic vapor cell. Purple: Same spectrum, filtered with the commercial long-pass filter. The integral enhancement between atomic and the commercial filter is 15.5%. LP-filter = long-pass filter. (b) Single step bleaching of individual molecules proves the single emitter nature. (c) Transmission curves of the filter and different atomic vapor cells measured with a UV-VIS spectrometer (Lambda 16, PerkinElmer). (d) Calculated optical density of the filter (100 mm optical length) against temperature.Back to article page