Ultra-compact topological photonic crystal rainbow nanolasers operating in the 1550 nm telecom band with wavelength-scale mode volumes
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917840176545792 |
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| author | Tian, Feng Wang, Yilan Huang, Wendi Fang, Xuan Guo, Shengqun Zhou, Taojie |
| author_facet | Tian, Feng Wang, Yilan Huang, Wendi Fang, Xuan Guo, Shengqun Zhou, Taojie |
| contents | Density-integrated, multi-wavelength nanoscale lasers with ultra-low power consumption and ultra-compact footprints are essential for energy-efficient, fast and high-throughput data processing. Currently, on-chip multi-wavelength lasers predominantly rely on arrays of discrete large-scale conventional semiconductor lasers that are susceptible to the fabrication imperfections. Topological rainbow nanolasers, which spatially confine and emit specific topologically protected light frequencies, offer a prospective approach for achieving ultra-compact integrated multi-wavelength light sources with enhanced robustness against perturbations and defects. However, it remains a significant challenge to achieve highly localized topological rainbow trapping in nanocavities for laser emission with both high quality factors and ultra-small mode volumes. Here, we experimentally report ultra-compact topological photonic crystal rainbow nanolasers operating in the 1550 nm telecom band. Specifically, we present rainbow-like emission with uniform wavelength spacing and wavelength-scale mode volume $\sim 0.7 \left(\fracλ{n}\right)^3$ in a one-dimensional topological rainbow nanolaser, exhibiting robust lasing operation across a wide temperature range and a spectral tuning capability of approximately 70 nm. Additionally, we demonstrate an ultra-compact two-dimensional topological rainbow nanolaser in an exceptionally compact footprint of nearly 0.002 $\text{mm}^2$, featuring a broad rainbow spectra with 64 continuously tuned lasing peaks. Our work provides a promising method for realizing robust and nanoscale multi-wavelength tunable laser sources, paving the way for numerous potential applications in ultra-compact photonic chips. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_11009 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultra-compact topological photonic crystal rainbow nanolasers operating in the 1550 nm telecom band with wavelength-scale mode volumes Tian, Feng Wang, Yilan Huang, Wendi Fang, Xuan Guo, Shengqun Zhou, Taojie Optics Density-integrated, multi-wavelength nanoscale lasers with ultra-low power consumption and ultra-compact footprints are essential for energy-efficient, fast and high-throughput data processing. Currently, on-chip multi-wavelength lasers predominantly rely on arrays of discrete large-scale conventional semiconductor lasers that are susceptible to the fabrication imperfections. Topological rainbow nanolasers, which spatially confine and emit specific topologically protected light frequencies, offer a prospective approach for achieving ultra-compact integrated multi-wavelength light sources with enhanced robustness against perturbations and defects. However, it remains a significant challenge to achieve highly localized topological rainbow trapping in nanocavities for laser emission with both high quality factors and ultra-small mode volumes. Here, we experimentally report ultra-compact topological photonic crystal rainbow nanolasers operating in the 1550 nm telecom band. Specifically, we present rainbow-like emission with uniform wavelength spacing and wavelength-scale mode volume $\sim 0.7 \left(\fracλ{n}\right)^3$ in a one-dimensional topological rainbow nanolaser, exhibiting robust lasing operation across a wide temperature range and a spectral tuning capability of approximately 70 nm. Additionally, we demonstrate an ultra-compact two-dimensional topological rainbow nanolaser in an exceptionally compact footprint of nearly 0.002 $\text{mm}^2$, featuring a broad rainbow spectra with 64 continuously tuned lasing peaks. Our work provides a promising method for realizing robust and nanoscale multi-wavelength tunable laser sources, paving the way for numerous potential applications in ultra-compact photonic chips. |
| title | Ultra-compact topological photonic crystal rainbow nanolasers operating in the 1550 nm telecom band with wavelength-scale mode volumes |
| topic | Optics |
| url | https://arxiv.org/abs/2411.11009 |