Frequency-resolved spectroscopy and its application to low-temperature geminate recombination in a-Si: H

Lifetime distribution of photoluminescence and radiative recombination rate of electron‐hole pairs in a‐Si:H

“…The non-exponential decays of the PL are described by lifetime distributions obtained experimentally by means of frequency resolved spectroscopy (FRS) [1]. Recently, Aoki [2] has reported lifetime distributions for a-Si:H in a wide range of lifetime.…”

Two crystallographic sites in erbium-doped fluoride glass by frequency-resolved and site-selective spectroscopies

“…Theoretical results concerning the frequency response of an atomic level of lifetime s were already described by different authors [12,13] who focused on quadratic frequency-resolved spectroscopy (QFRS). The sample is excited using light of sinusoidally modulated intensity and the emitted fluorescence follows the modulation of the excitation with the same frequency.…”

“…In this part, we present a short overview for frequency-resolved spectroscopy (FRS) and we review the main theoretical and experimental results given in Refs. [12,13]. Then, we go further away in the analysis of the frequency response with the goal of selective emission in mind.…”

“…From an experimental point of view, TRS employs pulsed laser and boxcar system while FRS uses CW modulated laser and lock-in technique. Quadratic frequency-resolved spectroscopy (QFRS) was used in numerous papers in order to measure lifetime distribution of emitters in hydrogenated amorphous silicon [12,13,17]. Recently, FRS was used to separate overlapping spectral features in Tm 3þ -doped glasses [18] and to measure erbium ions lifetime [19].…”

“…The theoretical background of (FRS) is given in the second part. Previous FRS studies [12,13] mainly focused on Quadratic FRS and its applications to measure lifetime distribution for recombination in semiconductors. Here, we accurately analyze the site-selection possibilities offered by FRS.…”