Spaser As a Biological Probe
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Understanding cell biology greatly benefits from the development of advanced diagnostic probes. Here we introduce a 22-nm spaser (plasmonic nanolaser) with the ability to serve as a super-bright, water-soluble, biocompatible probe capable of generating stimulated emission directly inside living cells and animal tissues. We have demonstrated a lasing regime associated with the formation of a dynamic vapour nanobubble around the spaser that leads to giant spasing with emission intensity and spectral width >100 times brighter and 30-fold narrower, respectively, than for quantum dots. The absorption losses in the spaser enhance its multifunctionality, allowing for nanobubble-amplified photothermal and photoacoustic imaging and therapy. Furthermore, the silica spaser surface has been covalently functionalized with folic acid for molecular targeting of cancer cells. All these properties make a nanobubble spaser a promising multimodal, super-contrast, ultrafast cellular probe with a single-pulse nanosecond excitation for a variety of in vitro and in vivo biomedical applications.
Half-wave nanolasers and intracellular plasmonic lasing particles.
Cho S, Martino N, Yun S Nat Nanotechnol. 2025; .
PMID: 39747602 DOI: 10.1038/s41565-024-01843-7.
Nanolasers: More than a decade of progress, developments and challenges.
Ellis T, Eslami S, Palomba S Nanophotonics. 2024; 13(15):2707-2739.
PMID: 39635246 PMC: 11501162. DOI: 10.1515/nanoph-2023-0369.
Towards photoacoustic human imaging: Shining a new light on clinical diagnostics.
Wang Z, Yang F, Zhang W, Xiong K, Yang S Fundam Res. 2024; 4(5):1314-1330.
PMID: 39431136 PMC: 11489505. DOI: 10.1016/j.fmre.2023.01.008.
Ultrafast photoluminescence and multiscale light amplification in nanoplasmonic cavity glass.
Piotrowski P, Buza M, Nowaczynski R, Kongsuwan N, Surma H, Osewski P Nat Commun. 2024; 15(1):3309.
PMID: 38632272 PMC: 11024168. DOI: 10.1038/s41467-024-47539-3.
Ultrasmall InGa(As)P Dielectric and Plasmonic Nanolasers.
Sarkar D, Cho S, Yan H, Martino N, Dannenberg P, Yun S ACS Nano. 2023; 17(16):16048-16055.
PMID: 37523588 PMC: 11229223. DOI: 10.1021/acsnano.3c04721.