Measurement of the modal birefringence of single-mode K(+) ion-exchanged planar waveguides with polarimetric interferometry.
The polarimetric interference pattern on the surface of single-mode planar waveguides made by potassium ion exchange in soda-lime glass substrates can be observed through a 45 degrees analyzer, which allows for the high-precision measurement of the modal birefringence of samples in a wide range of 0 to 5 x 10(-4). Using this method, believed to be new, we investigated the effects of exchange temperature and time on the modal birefringence of single-mode potassium ion-exchanged waveguides. The modal birefringence profile was achieved by measurement of the variation of the phase difference between the TE(0) and the TM(0) modes with hydrofluoric-acid-etching depth of the sample.
High-sensitivity low-frequency magnetometer using magnetostrictive primary sensing and piezoelectric signal recovery
A simple and inexpensive magnetometer is presented which uses a piezomagnetic primary sensor together with a piezoelectric transducer to convert a magnetic field into an electrical signal. A linear operating range is achieved by employing a negative feedback configuration. The detection sensitivity is 1.5 x 10-4 A/m per Hz1/2at low frequencies.
The Handbook of Nanotechnology: Business, Policy, and Intellectual Property Law
Acknowledgments. Foreword. Introduction. Part I: Introduction to Nanotechnology. Chapter 1: Understanding Nanotechnology. Chapter 2: The Industrial Structure Giving Rise to Nanotechnology. Part II: Nanotechnology Policy and Regulation. Chapter 3: Societal and Ethical Implications. Chapter 4: Environmental Regulation. Chapter 5: The Patent and Trademark Office. Chapter 6: FDA Regulation. Chapter 7: National Security and Export Controls. Chapter 8: Federal Funding. Chapter 9: Conclusions. Part III: Nanotechnology Business. Chapter 10: Starting a Nanotech Company. Chapter 11: Business Plans and Strategy. Chapter 12: Early Stage Financing. Chapter 13: Intellectual Property. Chapter 14: Corporate Partnering and Globalization. Chapter 15: Consolidation and Standardization. Chapter 16: Exit Opportunities. Chapter 17: Conclusions. Notes. About the Authors. Index.