Tensile-strained InxGa1-xP membranes for cavity optomechanics

Autor(en)

Garrett D. Cole, Pen-Li Yu, Claus Gärtner, Karoline Siquans, Ramon Moghadas Nia, Jonas Schmoele, Jason Hoelscher-Obermaier, Thomas P. Purdy, Witlef Wieczorek, Cindy A. Regal, Markus Aspelmeyer

Abstrakt

We investigate the optomechanical properties of tensile-strained ternary InxGa1−xP nanomembranes grown on GaAs. This material

system combines the benefits of highly strained membranes, similar to

those based on stoichiometric silicon nitride, with the unique properties of thin-film semiconductor single crystals, as previously demonstrated with suspended GaAs. Here, we employ lattice mismatch in epitaxial growth to impart an intrinsic tensile strain to a monocrystalline thin film (approximately 30 nm thick). These structures exhibit mechanical quality factors of 2 × 10⁶ or beyond at room temperature and 17 K for eigenfrequencies up to 1 MHz, yielding Q × f products of 2 × 10¹² Hz for a tensile stress of ∼170 MPa. Incorporating such membranes in a high-finesse Fabry-Perot cavity, we extract an upper limit to the total optical loss (including both absorption and scatter)

of 40 ppm at 1064 nm and room temperature. Further reductions of the In

content of this alloy will enable tensile stress levels of 1 GPa, with

the potential for a significant increase in the Q × f product, assuming

no deterioration in the mechanical loss at this composition and strain

level. This materials system is a promising candidate for the integration of strained semiconductor membrane structures with low-loss semiconductor mirrors and for realizing stacks of membranes for enhanced optomechanical coupling

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

U.S. Department of Commerce, University of Colorado, Boulder, Max-Planck-Institut für Gravitationsphysik (Albert Einstein Institut)

Journal

Applied Physics Letters

Band

104

Anzahl der Seiten

5

ISSN

0003-6951

DOI

https://doi.org/10.1063/1.4879755

Publikationsdatum

05-2014

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/27e8ca11-3044-4864-affb-85bf3b7b8a55