On-chip, high-sensitivity temperature sensors based on dye-doped solid-state polymer microring lasers

Wan, Lei; Chandrahalim, Hengky; Chen, Cong; Chen, Qiushu; Mei, Ting; Oki, Yuji; Nishimura, Naoya; Guo, L. Jay; Fan, Xudong

doi:10.1063/1.4986825

Cited by 39 publications

(30 citation statements)

References 37 publications

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“…In this case, the luminous efficiency of the polymer reduced along with a gradual decrease in the lasing intensity. The thermally-induced resonant wavelength shift δλ can be expressed as follows [ 41 , 42 , 43 ]:

where

denotes the thermo-optic coefficient and

indicates the thermal expansion coefficient. λ 0 designates the cavity resonant wavelength at room temperature and Δ T denotes the temperature change of the capillary-tube liquid-polymer microcavity.…”

Section: Experiments Results and Discussionmentioning

confidence: 99%

Tunable WGM Laser Based on the Polymer Thermo-Optic Effect

et al. 2021

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In this work, the thermo-optic effect in polymers was used to realize a temperature-tunable whispering-gallery-mode laser. The laser was fabricated using a capillary tube filled with a light-emitting conjugated polymer solution via the capillary effect. In the whispering-gallery-mode laser emission wavelength can be continuously tuned to about 19.5 nm using thermo-optic effect of polymer. The influence of different organic solvents on the tuning rate was studied. For a typical lasing mode with a bandwidth of 0.08 nm, a temperature-resolved tuning rate of ~1.55 nm/°C was obtained. The two-ring coupling effect is responsible for the suppression of the WGM in the micro-cavity laser. The proposed laser exhibited good reversibility and repeatability as well as a sensitive response to temperature, which could be applied to the design of photothermic and sensing devices.

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where

denotes the thermo-optic coefficient and

Section: Experiments Results and Discussionmentioning

confidence: 99%

Tunable WGM Laser Based on the Polymer Thermo-Optic Effect

et al. 2021

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“…Many cavity geometries have been proposed, which can roughly be divided into two categories: planar and pillar supported resonators. [29] Microrings [86][87][88][89][90][91][92] and microdisks [93,94] are typical planar cavities. Many on-chip WGM sensors based on planar resonators have been proposed recently, which enables label-free, real-time sensing and detection in an integrated platform.…”

Section: Pillarmentioning

confidence: 99%

Microfluidic Whispering Gallery Mode Optical Sensors for Biological Applications

Wang

Zeng

Humbert

et al. 2020

Laser & Photonics Reviews

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Whispering gallery mode (WGM) resonators have been exploited as a highly sensitive and efficient sensing technique in the past few years. They offer the advantages of ultrahigh sensitivity, compact size, and label-free sensing capability. More recently, with the rapid development of microfluidic technologies, many integrated WGM sensors, by combining the portability of lab-on-chip devices and the high sensitivity of WGM resonators, have emerged. The capabilities of efficient sample handling and multiplexed analyte detection offered by these systems have led to many biological and chemical sensing applications, especially for the detection of single particle or biomolecule. In this review, different sensing mechanisms based on integrated whispering gallery mode resonators are introduced. Various geometries of WGM cavities including solid, liquid, and hollow resonators and a detailed discussion on their integration with microfluidic devices are also covered. Different types of packaging schemes and integration methods are compared in terms of ease of fabrication and device performance. Finally, recent applications of microfluidic-based WGM sensors for detecting biological and chemical target molecules are discussed, with a prospect on future challenges and trends of development in microfluidics for multiplexed detection.

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“…SU-8 material exhibits high thermal optics (TO) coefficient of −3.5 × 10 −4 K −1 [31], which is higher than that of materials that are commonly used to fabricate WGM resonators, such as silica (1 × 10 −5 K −1 ) [32] and silicon (1.8 × 10 −4 K −1 ) [33]. Combining with on-chip integration, ease of laser probing and readout based on free-space optics against passive WGM thermal sensors using relatively fragile tapered microfiber [34,35], the fabricated all-polymer microdisk laser provides a good platform for ultrasensitive thermal sensing.…”

Section: Basic Element Sensingmentioning

confidence: 99%

On-Chip Real-Time Chemical Sensors Based on Water-Immersion-Objective Pumped Whispering-Gallery-Mode Microdisk Laser

Chen

et al. 2019

Nanomaterials

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Optical whispering-gallery-mode (WGM) microresonator-based sensors with high sensitivity and low detection limit down to single unlabeled biomolecules show high potential for disease diagnosis and clinical application. However, most WGM microresonator-based sensors, which are packed in a microfluidic cell, are a “closed” sensing configuration that prevents changing and sensing the surrounding liquid refractive index (RI) of the microresonator immediately. Here, we present an “open” sensing configuration in which the WGM microdisk laser is directly covered by a water droplet and pumped by a water-immersion-objective (WIO). This allows monitoring the chemical reaction progress in the water droplet by tracking the laser wavelength. A proof-of-concept demonstration of chemical sensor is performed by observing the process of salt dissolution in water and diffusion of two droplets with different RI. This WIO pumped sensing configuration provides a path towards an on-chip chemical sensor for studying chemical reaction kinetics in real time.

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On-chip, high-sensitivity temperature sensors based on dye-doped solid-state polymer microring lasers

Cited by 39 publications

References 37 publications

Tunable WGM Laser Based on the Polymer Thermo-Optic Effect

Tunable WGM Laser Based on the Polymer Thermo-Optic Effect

Microfluidic Whispering Gallery Mode Optical Sensors for Biological Applications

On-Chip Real-Time Chemical Sensors Based on Water-Immersion-Objective Pumped Whispering-Gallery-Mode Microdisk Laser

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