Kerr and Faraday effects are established tools for magneto-optical characterizations. They provide a versatile yet sensitive approach to study respective surface and bulk magnetism [1-3]. Due to similarity of optical path, it is possible to realize simultaneous detection of both Faraday and polar Kerr effects in one setup. In this work, detail description of a magneto-optical setup detecting Faraday and polar Kerr effects simultaneously is presented. Optimization of signal detection in this setup is analyzed using Jones matrix formalism. Advantages of simultaneous detection of the two magneto-optical signals are demonstrated.
The stiffness of an optical tweezer is one of the most crucial parameters in virtually all related quantization experiments. Due to the limitation of instruments and the uncertainty of the measurement, the acquisition of the stiffness often takes place in a prolonged period and or requires additional data processing. Here, we demonstrate that with a PID power locking system made from a feedback loop consisting of a Field-Programmable Gate Array (FPGA) and Acoustic Optical Modulator (AOM), the stiffness calculated from the Quadrant Photodetector (QPD) signal shows a significantly reduced uncertainty compared to that of the unlocked situation, resulting in a much-reduced measurement time and an improved accuracy.
Single Bubble Sonoluminescence (SBSL) represents a light-emitting effect from a bubble driven by ultrasound. In this work, SBSL phenomenon in potassium dihydrogen phosphate (KDP) solutions was studied. SBSL intensity in KDP solutions with respect to ultrasonic amplitude and frequency, concentration and temperature was measured and analyzed. Result shows that stable SBSL can be realized around 27.6 kHz. Meanwhile, it is found that the optimal driving frequencies and driving ultrasonic amplitudes of SBSL are substantially affected by the liquid temperature and concentration. SBSL in water was used as a reference, and comparison between results for KDP solutions and water shows different trends. In the measured spectra of SBSL in KDP solutions, the characteristic emission lines of ions were not found, which indicates that the ions in the solution did not or hardly participate in the sonoluminescence process.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.