Optimized frequency dependent photothermal beam deflection spectroscopy

摘要: In the letter optimization of experimental setup for photothermal beam deflection spectroscopy is performed by analyzing influence its geometrical parameters (detector and sample position, probe radius waist position etc) on detected signal. Furthermore, effects fluid's thermo-optical properties, optimized configuration, measurement sensitivity uncertainty determination thermal properties also studied. The examined a recently developed CuFeInTe3 material. It seen from obtained results, that it complex problem to choose proper configuration as well sensing fluid enhance method. A signal enhancement observed at low modulation frequencies placing in acetonitrile (ACN), while high higher measurements made air. For both, detection air performed. determined values diffusivity conductivity are (0.048 ± 0.002) × 10−4 m2 s−1 4.6 0.2 W m−1 K−1 (0.056 0.005) 4.8 0.4 ACN air, respectively. seen, agree within range their uncertainties both cases, although two times lower providing more accurate results. analysis use theoretical description based optics. shown, how presented work fits into current status spectroscopy.