Title :
Domain-engineered thin-film LiNbO3 pyroelectric-bicell optical detector
Author :
Lehman, J.H. ; Radojevic, A.M. ; Osgood, R.M., Jr.
Author_Institution :
Sources & Detectors Group, Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
We have fabricated a bicell detector consisting of a single freestanding film of single-crystal lithium niobate (LiNbO3) 10-μm thick, having two adjacent domains of opposite spontaneous polarization, and hence, two adjacent pyroelectric detector regions of equal and opposite sensitivity. The film was created by applying the process of crystal ion slicing and electric field poling (domain engineering) to a Z-cut LiNbO3 wafer. The detector´s noise equivalent power was 6 nW/spl middot/Hz/sup -1/2/ at 16 Hz, and the ambient temperature-dependent variation of the detector´s response near room temperature was 0.1% K/sup -1/. The acoustic noise sensitivity measured at 100 Hz was -24 dB relative e to that of a single-domain detector.
Keywords :
lithium compounds; optical fabrication; optical films; optical noise; photodetectors; photorefractive materials; pyroelectric detectors; LiNbO/sub 3/; LiNbO/sub 3/ wafer; acoustic noise sensitivity; adjacent pyroelectric detector; ambient temperature-dependent variation; crystal ion slicing; domain engineering; domain-engineered; electric field poling; equivalent power; near room temperature; opposite sensitivity; opposite spontaneous polarization; single freestanding film; single-domain detector; thin-film LiNbO/sub 3/ pyroelectric-bicell optical detector; Acoustic measurements; Acoustic noise; Acoustic signal detection; Detectors; Lithium niobate; Polarization; Power engineering and energy; Pyroelectricity; Temperature sensors; Transistors;
Journal_Title :
Photonics Technology Letters, IEEE
