Gain-Based Mechanism for pH Sensing Based on Random Lasing

Autor:	Gaio, M, Caixeiro, S, Marelli, B, Omenetto, FG, Sapienza, R
Jazyk:	angličtina
Rok vydání:	2017
Předmět:	RANDOM LASERS Science & Technology Physics Physical Sciences Physics::Optics physics.optics CELL FLUORESCENCE Physics Applied
Zdroj:	Gaio, M, Carlos Caixeiro, S, Marelli, B, Omenetto, F & Sapienza, R 2017, ' Gain-Based Mechanism for pH Sensing Based on Random Lasing ', PHYSICAL REVIEW APPLIED, vol. 7, no. 3, 034005, pp. 034005-1-034005-6 . https://doi.org/10.1103/PhysRevApplied.7.034005
DOI:	10.1103/PhysRevApplied.7.034005
Popis:	Here, we investigate the mechanism of a random-lasing-based sensor which shows p H sensitivity exceeding by 2 orders of magnitude that of a conventional fluorescence sensor. We explain the sensing mechanism as related to gain modifications and lasing-threshold nonlinearities. A dispersive diffusive lasing theory matches the experimental results well, and it allows us to predict the optimal sensing conditions and a maximal sensitivity as large as 200 times that of an identical fluorescence-based sensor. The lack of complex alignment and the high sensitivity make this mechanism promising for future biosensing applications.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::f82a4f22162f98ec81eafae4a5f394f9 https://kclpure.kcl.ac.uk/ws/files/67185935/Gain_Based_Mechanism_GAIO_Published6March2017_GOLD_VoR_CC_BY_.pdf Zobrazit plný text záznamu