Publications
Journal Articles
2025
- Optics LettersPurcell enhanced laser action using a super-Tamm cavity modeSudha Maria Lis S, Somnath Pandit, Someprosad Patra, and 5 more authorsOptics Letters, Mar 2025
Optical Tamm structures have potential for the development of optoelectronic devices, provided they overcome the challenge of low-quality factor of modes and inherent losses associated with plasmonic metal films. In this work, we present lasing in a super-Tamm structure consisting of a silver thin film deposited on a 4-(dicyanomethylene)-2-methyl-6-(4- dimethylaminostyryl)-H-pyran (DCM) dye-doped polyvinyl alcohol (PVA) spacer layer coated on a SiO2/TiO2 one-dimensional photonic crystal with a lasing threshold of 0.07 mJ. The spectral line narrowing and threshold characteristics observed in the emission spectrum corroborate the realization of a waveguided super-Tamm laser. The bi-exponential temporal decay profile of the Tamm lasing modes with an average lifetime of 0.52 ± 0.02 ns confirms the Purcell enhancement of radiative intensity of the DCM dye when coupled to the super-Tamm modes.
@article{lis_s_purcell_2025, title = {Purcell enhanced laser action using a super-{Tamm} cavity mode}, volume = {50}, issn = {0146-9592, 1539-4794}, url = {https://opg.optica.org/abstract.cfm?URI=ol-50-6-1869}, doi = {10.1364/OL.543288}, language = {en}, number = {6}, urldate = {2025-03-16}, journal = {Optics Letters}, author = {Lis S, Sudha Maria and Pandit, Somnath and Patra, Someprosad and Lone, Faizan H. and Singh, Nitesh and Banerjee, Debamalya and Nair, Rajesh V. and Bhaktha B N, Shivakiran}, month = mar, year = {2025}, pages = {1869}, }
Conference Articles
2024
- CLEO 2024Spatial Correlation of Whispering Gallery Modes in an Active Micro-Bottle ResonatorSubhajit Dutta, Somnath Pandit, and B. N. Shivakiran BhakthaIn CLEO 2024, Mar 2024
The spatio-spectral imaging of active micro-bottle resonator (MBR) is performed and the spatial correlation of the whispering gallery modes (WGMs) are investigated in a dye-doped poly (methyl methacrylate) (PMMA) coated silica micro-bottle resonator.
@inproceedings{dutta_spatial_2024, address = {Charlotte, North Carolina}, title = {Spatial {Correlation} of {Whispering} {Gallery} {Modes} in an {Active} {Micro}-{Bottle} {Resonator}}, isbn = {978-1-957171-39-5}, url = {https://opg.optica.org/abstract.cfm?URI=CLEO_AT-2024-JTu2A.10}, doi = {10.1364/CLEO_AT.2024.JTu2A.10}, language = {en}, urldate = {2024-09-12}, booktitle = {{CLEO} 2024}, publisher = {Optica Publishing Group}, author = {Dutta, Subhajit and Pandit, Somnath and Shivakiran Bhaktha, B. N.}, year = {2024}, pages = {JTu2A.10}, }
2023
- CLEO 2023Tamm Mode-Aided Amplified Spontaneous Emission in One-Dimensional Photonic Crystal Super-Tamm StructureSudha Maria Lis S, Somnath Pandit, Someprosad Patra, and 2 more authorsIn CLEO 2023, Mar 2023
The optical Tamm mode-aided amplified spontaneous emission in a super-Tamm structure consisting of a silver (Ag) thin film deposited on dye-doped polyvinyl alcohol (PVA) layer coated on a SiO2/TiO2 one-dimensional photonic crystal structure is presented.
@inproceedings{S:23, author = {S, Sudha Maria Lis and Pandit, Somnath and Patra, Someprosad and Banerjee, Debamalya and N, Shivakiran Bhaktha B}, booktitle = {CLEO 2023}, journal = {CLEO 2023}, keywords = {Atomic force microscopy; Modes; Photonic crystals; Scanning electron microscopy; Thin films; Titanium dioxide}, pages = {FF2D.4}, publisher = {Optica Publishing Group}, title = {Tamm Mode-Aided Amplified Spontaneous Emission in One-Dimensional Photonic Crystal Super-Tamm Structure}, year = {2023}, url = {https://opg.optica.org/abstract.cfm?URI=CLEO_FS-2023-FF2D.4}, doi = {10.1364/CLEO_FS.2023.FF2D.4}, }