Optical tweezers assisted coupling of nematic droplets to gold nanoparticle cluster: effect on whispering gallery modes
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866914221145456640 |
|---|---|
| author | Pandey, Sumant Kumar, G. V. Pavan |
| author_facet | Pandey, Sumant Kumar, G. V. Pavan |
| contents | Dye doped liquid crystal (LC) microdroplets exhibit tunable optical resonances modulated by size, shape, temperature, and external perturbations. When a dye-doped nematic microdroplet is coupled to a gold nanoparticle cluster, near-field interactions enhance local electric fields, boosting fluorescence emission. Optical tweezers serve as a tool for the parking of dye doped nematic microdroplets on gold nanoparticle clusters, enabling the dynamic coupling and excitation of whispering-gallery modes (WGMs). This configuration resulted in amplified WGMs, with a clearly detectable shift in the spectral position. Resonance mode red shifts confirmed efficient photonic plasmonic coupling, with up to seven nm tunability achieved without significant degradation of the Q-factor. The magnitude of tunability depends on the size of the gold nanoparticle cluster. Also, the WGM emission spectrum of the nematic microdroplet can be reversibly tuned by decoupling from the gold nanoparticle cluster. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_10126 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optical tweezers assisted coupling of nematic droplets to gold nanoparticle cluster: effect on whispering gallery modes Pandey, Sumant Kumar, G. V. Pavan Optics Soft Condensed Matter Dye doped liquid crystal (LC) microdroplets exhibit tunable optical resonances modulated by size, shape, temperature, and external perturbations. When a dye-doped nematic microdroplet is coupled to a gold nanoparticle cluster, near-field interactions enhance local electric fields, boosting fluorescence emission. Optical tweezers serve as a tool for the parking of dye doped nematic microdroplets on gold nanoparticle clusters, enabling the dynamic coupling and excitation of whispering-gallery modes (WGMs). This configuration resulted in amplified WGMs, with a clearly detectable shift in the spectral position. Resonance mode red shifts confirmed efficient photonic plasmonic coupling, with up to seven nm tunability achieved without significant degradation of the Q-factor. The magnitude of tunability depends on the size of the gold nanoparticle cluster. Also, the WGM emission spectrum of the nematic microdroplet can be reversibly tuned by decoupling from the gold nanoparticle cluster. |
| title | Optical tweezers assisted coupling of nematic droplets to gold nanoparticle cluster: effect on whispering gallery modes |
| topic | Optics Soft Condensed Matter |
| url | https://arxiv.org/abs/2509.10126 |