Resonant Microbubble as a Microfluidic Stage for All-Optical Photoacoustic Sensing

被引：27

作者：

Frigenti, Gabriele ^{[1
,2
,3
,4
]}

Cavigli, Lucia ^{[3
]}

Fernandez-Bienes, Alberto ^{[5
]}

Ratto, Fulvio ^{[3
]}

Centi, Sonia ^{[3
]}

Garcia-Fernandez, Tupak ^{[6
]}

Conti, Gualtiero Nunzi ^{[1
,2
,3
]}

Soria, Silvia ^{[3
]}

机构：

[1] Ctr Fermi, Museo Stor Fis, Piazza Viminale 1, I-00184 Rome, RM, Italy

[2] Ctr Fermi, Ctr Studi & Ric Enrico Fermi, Piazza Viminale 1, I-00184 Rome, RM, Italy

[3] CNR, Ist Fis Applicata Nello Carrara, Via Madonna Piano 10, I-50019 Sesto Fiorentino, FI, Italy

[4] Univ Firenze, Lab Europeo Spettroscopia Nonlineare, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy

[5] Univ Nacl Autonoma Mexico, Fac Ingn, Ciudad De Mexico 04510, Mexico

[6] Univ Autonoma Ciudad Mexico, Prolongac San Isidro 151, Ciudad De Mexico 09790, Mexico

来源：

PHYSICAL REVIEW APPLIED | 2019年 / 12卷 / 01期

关键词：

ULTRASOUND DETECTION; FLOW-CYTOMETRY; MICROSCOPY;

D O I：

10.1103/PhysRevApplied.12.014062

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We implement a whispering-gallery-mode microbubble resonator (MBR) as a multifunctional component for all-optical photoacoustic inspection of materials in a platform combining microfluidic design and high sensitivity to spectral absorbance. In our setup, the MBR acts both as the acoustic transducer and as the vial for a sample causing the photoacoustic event, thus dictating its operational frequency and removing any need for impedance-matching media. We challenge our setup in the assessment of the photostability of gold nanorods to demonstrate its validity. We develop a numerical model to qualitatively interpret the experimental signal as a transient shift of the resonance condition of the MBR. Possible implementations of the MBR in photoacoustic sensors are discussed.

引用

页数：6

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