[en] Quartz were implanted with Ni⁺ ions of various doses with energy 100 KeV. The technique of photoacoustic spectroscopy is used in the present work to investigate the optical properties of the metal implanted glass substrates. The photoacoustic technique is an absolute method, which provides a direct measurement of the energy absorbed by the sample. Here we have used a very simple technique to obtain the normalized photoacoustic spectra corrected for the spectral variation of the source in a single scan. The observed features in the photoacoustic spectrum were compared with the optical absorption data obtained from UV-Vis spectroscopy. A correlative study of the optical absorption as well as the photoacoustic spectroscopy helps to get a detailed information of the interesting physical properties of Ni⁺ nanoclusters in glass