Electrically-induced resonance shifts of whispering gallery resonators made of barium magnesium fluoride
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908393053093888 |
|---|---|
| author | Mrokon, Alexander Kraft, Heike Shin, Dongsung Tanaka, Hiroki Herr, Simon J. Buse, Karsten Breunig, Ingo |
| author_facet | Mrokon, Alexander Kraft, Heike Shin, Dongsung Tanaka, Hiroki Herr, Simon J. Buse, Karsten Breunig, Ingo |
| contents | Barium magnesium fluoride (BMF) is a ferroelectric crystal with a transparency range far beyond the one of other optical materials. In particular, its low loss in the deep ultraviolet makes this material an unique candidate for frequency conversion in this spectral range. Due to its relatively weak second-order nonlinearity, a resonant configuration such as an optical whispering gallery would be beneficial. We show that femtosecond-laser based material processing enables the reliable fabrication of BMF whispering gallery resonators with quality factors beyond $10^7$. Their resonance frequencies can be shifted linearly by applying electric fields between the $+c$ and $-c$ faces of the crystal. The slope of the shift is $-0.8$~MHz/(V/mm). It seems that the origin of this shift is piezoelectricity, while the electro-optic effect is negligible. Our results pave the way for millimeter-sized frequency converters in the deep ultraviolet. Furthermore, they indicate that a careful determination of fundamental material properties is still necessary. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03873 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electrically-induced resonance shifts of whispering gallery resonators made of barium magnesium fluoride Mrokon, Alexander Kraft, Heike Shin, Dongsung Tanaka, Hiroki Herr, Simon J. Buse, Karsten Breunig, Ingo Optics Barium magnesium fluoride (BMF) is a ferroelectric crystal with a transparency range far beyond the one of other optical materials. In particular, its low loss in the deep ultraviolet makes this material an unique candidate for frequency conversion in this spectral range. Due to its relatively weak second-order nonlinearity, a resonant configuration such as an optical whispering gallery would be beneficial. We show that femtosecond-laser based material processing enables the reliable fabrication of BMF whispering gallery resonators with quality factors beyond $10^7$. Their resonance frequencies can be shifted linearly by applying electric fields between the $+c$ and $-c$ faces of the crystal. The slope of the shift is $-0.8$~MHz/(V/mm). It seems that the origin of this shift is piezoelectricity, while the electro-optic effect is negligible. Our results pave the way for millimeter-sized frequency converters in the deep ultraviolet. Furthermore, they indicate that a careful determination of fundamental material properties is still necessary. |
| title | Electrically-induced resonance shifts of whispering gallery resonators made of barium magnesium fluoride |
| topic | Optics |
| url | https://arxiv.org/abs/2506.03873 |