These arc lamps are an excellent source of short wavelength ultraviolet radiation and they have intense emissions in the near infrared, which is used in some night vision systems.
A light source of appropriate wavelength will not be feasible or cost-effective in all circumstances.
Typically, realization of the UC phenomenon requires a proper host lattice selected lanthanide dopants of sensitizer and activator, and an excitation source of appropriate wavelength.
The current clinical trend is to develop therapeutic windows that are less absorptive of water, hemoglobin, and melanin, namely, near-infrared absorbing photosensitizer, and to cure acne tissues with a light source of longer wavelength [ 9, 10].
In most experiments, light-emitting diodes (LED) were used as monochromatic sources of different wavelength light.
Figure 1b depicts a Raman spectrum of a MoS2 single crystal using the light source of 414.5 nm wavelength.
The PL spectra of C450, C5N1, and C450N obtained with an excitation source of 220 nm wavelength are showed in Figure 5a.
Photoluminescence (PL) spectra were measured at room temperature with an excitation source of 325-nm wavelength using a He-Cd laser.
Whole animals are then illuminated on an epifluorescence microscope, with a high power light source of the appropriate wavelength depending on the excitation spectrum of the fluorescent protein used.
After incubation at different time intervals, the cells were trypsined and then analyzed on a FACScan flow cytometer using BD Accuri CFlow Plus software (Accuri Cytometers, Ltd., UK), with argon laser as light source of 488 nm wavelength.
