Quartz has been attracted attention as a nonlinear optical material without spontaneous polarization. Supposing that
twinning of quartz crystal could be achieved effectively rather by impressing bending stress, we studied on making a
periodically inverted structure to generate VUV lights by quasi-phase matching. We fabricated experimentally the
inverted structure locally by impressing the stress for the AT-cut quartz substrate that was heated. Moreover, the stress
distribution was calculated when the bending stress was impressed to the substrate with the rectangle structure, and then
the condition for the polarization inversion was also calculated.
BaMgF4 is a novel ferroelectric fluoride which is transparent in the wavelength regions from 125 nm to 1300 nm.
Recently, the trial production of the frequency conversion device with BaMgF4 single crystal was reported for the
ultraviolet (UV) and vacuum ultraviolet (VUV) wavelength regions, but there has been a few report on it. The BaMgF4 is
very attractive ferroelectric crystal because it can be used as a quasi phase matching (QPM) device such as LiNbO3 or
LiTaO3. Nonlinear crystals have very large nonlinear coefficients generally, but these coefficients limited wavelength
regions to use due to the birefringent phase matching, which limited to the wavelength from 573 nm to 5634 nm. Thus
the QPM technique is attractive to fabricate frequency-conversion device in the UV/VUV region. In this study, we have
purpose to fabricate BaMgF4 hetero-epitaxial thin films toward frequency conversion devices. The optical-grade
BaMgF4 single crystal has been fabricated by Bridgman method. Rather we focus on fabrication of BaMgF4 thin films
by the precise and careful method of ion beam sputtering. It will be possible to fabricate also its waveguide structure
under the vacuum-consistent 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.