Design of an ultracompact optical gas sensor based on a photonic crystal nanobeam cavity

Feng, Changkun; Feng, Gang; Zhou, Guangya; Chen, N. J.; Zhou, Shuai

doi:10.7452/lapl.201210075

Cited by 22 publications

(9 citation statements)

References 16 publications

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“…In Table 2, the Q and sensitivity of this work is compared with similar studies found in literature. It can be observed that the refractive index sensitivity found in this work is much higher than those reported in [17,30]. The designed cavity is also sensitive to temperature.…”

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confidence: 71%

High-sensitivity and high-Q-factor glass photonic crystal cavity and its applications as sensors

Siraji

Zhao

2015

Opt. Lett.

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We investigate the properties of a planar photonic crystal cavity on glass and its applications as sensors. An airbridged twofold defect cavity on Schott glass background and Gorilla glass substrate has been designed for high Q-factor up to 4459. The average sensitivity of the cavity resonance to background refractive index is 388 nm/Refractive Index Unit. The resonant wavelength is sensitive to background temperature by 18.5 pm/°C. The designed sensors show much higher sensitivity than those based on waveguide interferometers or photonic bandgap structures without cavity resonance. The results are also useful for experimental studies of glass photonic devices.

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confidence: 71%

High-sensitivity and high-Q-factor glass photonic crystal cavity and its applications as sensors

Siraji

Zhao

2015

Opt. Lett.

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“…For example, Feng et al proposed the use of PCNC to obtain an ultra-compact, low-cost, and high S spectroscopic gas sensor in 2012. The whole spectroscopic gas sensor was composed of the radiation source, the interaction part and the detector [103], as illustrated in Figure 7a. The PCNC contained seven tapered air holes and 10 mirror holes, as shown in Figure 7b.…”

Section: Other Applicationsmentioning

confidence: 99%

Photonic Crystal Nanobeam Cavities for Nanoscale Optical Sensing: A Review

et al. 2020

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The ability to detect nanoscale objects is particular crucial for a wide range of applications, such as environmental protection, early-stage disease diagnosis and drug discovery. Photonic crystal nanobeam cavity (PCNC) sensors have attracted great attention due to high-quality factors and small-mode volumes (Q/V) and good on-chip integrability with optical waveguides/circuits. In this review, we focus on nanoscale optical sensing based on PCNC sensors, including ultrahigh figure of merit (FOM) sensing, single nanoparticle trapping, label-free molecule detection and an integrated sensor array for multiplexed sensing. We believe that the PCNC sensors featuring ultracompact footprint, high monolithic integration capability, fast response and ultrahigh sensitivity sensing ability, etc., will provide a promising platform for further developing lab-on-a-chip devices for biosensing and other functionalities.Micromachines 2020, 11, 72 2 of 20 microcavities confine the light in a small volume, leading to significant enhancement of light-matter interaction, resulting in ultra-high sensitivity (S) and a low detection limit. When subject to slight environmental changes, the spectral properties change can be obtained, e.g., resonator wavelength shift [20][21][22] and mode broadening [23].The main types of optical microcavities include whispering gallery mode (WGM) cavities, Fabry-Perot (F-P) cavities and photonic crystal (PhC) cavities [24]. Among these, PhC cavities have been investigated as advantageous platforms due to their ultra-high Q/V enabling the enhancement of lightmatter interactions. Particularly, compared with two-dimensional (2D) PhC cavities, one-dimensional photonic crystal nanobeam cavities (1D-PCNCs) attract great attention for their ultra-sensitive optical sensing and lab-on-a-chip applications, owing to their ultra-compact size, ultra-small mode volume, high integrability with bus-waveguide and excellent complementary metal-oxide-semiconductor (CMOS) compatible properties [25][26][27][28][29][30][31][32][33].In this review, we will focus on nanoscale optical sensing based on 1D-PCNCs. The structure of the review is organized as follows. A comprehensive overview about basic properties and sensing mechanisms of 1D-PCNCs sensors is discussed in Section 2. In Section 3, firstly, we introduce the efforts to pursue ultra-high figure of merit (FOM) in refractive index (RI) sensing based on 1D-PCNCs. Secondly, we outline the applications of 1D-PCNC sensors on single nanoparticle and label-free molecule (viruses, proteins and DNAs) detection. Thirdly, a monolithic integrated 1D-PCNC sensor array for multiplexed sensing is introduced explicitly. In addition, we present other sensing applications of 1D-PCNC sensors such as temperature sensing and optomechanical sensing, etc. Next, we review the nanofabrication and coupling techniques in the development of 1D-PCNC sensors in Section 4. Finally, we draw a brief conclusion. Figure 2. (a) Schematic of photonic circuits. The green lines, red boxes and black boxes represe...

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“…A gas sensor based on a photonic crystal nanobeam cavity coupled to a tapered optical fibre was proposed [85]. The nanobeam cavity has seven pairs of tapered air holes and ten pairs of mirror holes (Figure 16) and has a Q factor of 2.2 × 10 6 .…”

Section: Applications Of Tapered Optical Fibre Sensorsmentioning

confidence: 99%

“…( a ) Schematic illustration of an optical gas sensor based on a PhC nanobeam cavity; and ( b ) of the PhC nanobeam cavity [85], © Astro Ltd. Reproduced by permission of IOP Publishing. All rights reserved.…”

Section: Figurementioning

confidence: 99%

Tapered Optical Fibre Sensors: Current Trends and Future Perspectives

Korposh

James

Lee

et al. 2019

Sensors

148

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The development of reliable, affordable and efficient sensors is a key step in providing tools for efficient monitoring of critical environmental parameters. This review focuses on the use of tapered optical fibres as an environmental sensing platform. Tapered fibres allow access to the evanescent wave of the propagating mode, which can be exploited to facilitate chemical sensing by spectroscopic evaluation of the medium surrounding the optical fibre, by measurement of the refractive index of the medium, or by coupling to other waveguides formed of chemically sensitive materials. In addition, the reduced diameter of the tapered section of the optical fibre can offer benefits when measuring physical parameters such as strain and temperature. A review of the basic sensing platforms implemented using tapered optical fibres and their application for development of fibre-optic physical, chemical and bio-sensors is presented.

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Design of an ultracompact optical gas sensor based on a photonic crystal nanobeam cavity

Cited by 22 publications

References 16 publications

High-sensitivity and high-Q-factor glass photonic crystal cavity and its applications as sensors

High-sensitivity and high-Q-factor glass photonic crystal cavity and its applications as sensors

Photonic Crystal Nanobeam Cavities for Nanoscale Optical Sensing: A Review

Tapered Optical Fibre Sensors: Current Trends and Future Perspectives

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