Six types of hexagonal boron nitride are investigated by terahertz time-domain spectroscopy. The loss coefficient is shown to be linear with porosity, while variations in refractive index indicate the distribution of porosity within the structure. Pyrolytic boron nitride is demonstrated to be suitable as a terahertz optical material.
© 2013 Optical Society of America
Original Manuscript: August 28, 2012
Revised Manuscript: October 1, 2012
Manuscript Accepted: October 4, 2012
Published: October 29, 2012
Mira Naftaly and Jon Leist, "Investigation of optical and structural properties of ceramic boron nitride by terahertz time-domain spectroscopy," Appl. Opt. 52, B20-B25 (2013)