scholarly journals Applications of Photonic Crystal Nanobeam Cavities for Sensing

Micromachines ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 541 ◽  
Author(s):  
Qifeng Qiao ◽  
Ji Xia ◽  
Chengkuo Lee ◽  
Guangya Zhou
Keyword(s):  
Photonic Crystal ◽  
Optical Sensors ◽  
Chip Design ◽  
Comprehensive Review ◽  
Light Confinement ◽  
Refractive Index Sensing ◽  
Sensing Applications ◽  
On Chip ◽  
Easy Integration ◽  
Nanobeam Cavities

In recent years, there has been growing interest in optical sensors based on microcavities due to their advantages of size reduction and enhanced sensing capability. In this paper, we aim to give a comprehensive review of the field of photonic crystal nanobeam cavity-based sensors. The sensing principles and development of applications, such as refractive index sensing, nanoparticle sensing, optomechanical sensing, and temperature sensing, are summarized and highlighted. From the studies reported, it is demonstrated that photonic crystal nanobeam cavities, which provide excellent light confinement capability, ultra-small size, flexible on-chip design, and easy integration, offer promising platforms for a range of sensing applications.

On-chip integrated optofluidic complex refractive index sensing using silicon photonic crystal nanobeam cavities

2016 ◽  
Vol 41 (6) ◽  
pp. 1197 ◽  
Author(s):  
Xingwang Zhang ◽  
Guangya Zhou ◽  
Peng Shi ◽  
Han Du ◽  
Tong Lin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Complex Refractive Index ◽  
Refractive Index Sensing ◽  
Silicon Photonic ◽  
On Chip ◽  
Nanobeam Cavities

scholarly journals Opto-Mechanical Photonic Crystal Cavities for Sensing Application

2020 ◽  
Vol 10 (20) ◽  
pp. 7080
Author(s):  
Ji Xia ◽  
Qifeng Qiao ◽  
Guangcan Zhou ◽  
Fook Siong Chau ◽  
Guangya Zhou
Keyword(s):  
Photonic Crystal ◽  
Light Propagation ◽  
Mass Force ◽  
Mechanical Interaction ◽  
Quality Factors ◽  
Photonic Crystal Cavities ◽  
New Class ◽  
Experimental Systems ◽  
Sensing Applications ◽  
On Chip

A new class of hybrid systems that couple optical and mechanical nanoscale devices is under development. According to their interaction concepts, two groups of opto-mechanical systems are summarized as mechanically tunable and radiation pressure-driven optical resonators. On account of their high-quality factors and small mode volumes as well as good on-chip integrability with waveguides/circuits, photonic crystal (PhC) cavities have attracted great attention in sensing applications. Benefitting from the opto-mechanical interaction, a PhC cavity integrated opto-mechanical system provides an attractive platform for ultrasensitive sensors to detect displacement, mass, force, and acceleration. In this review, we introduce basic physical concepts of opto-mechanical PhC system and describe typical experimental systems for sensing applications. Opto-mechanical interaction-based PhC cavities offer unprecedented opportunities to develop lab-on-a-chip devices and witness a promising prospect to further manipulate light propagation in the nanophotonics.

Compact on-chip photonic crystal spectrometers for integrated sensing applications

2006 ◽  
Author(s):  
Babak Momeni ◽  
Ali A. Eftekhar ◽  
Majid Badieirostami ◽  
Jiandong Huang ◽  
Murtaza Askari ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Sensing Applications ◽  
On Chip

scholarly journals Simultaneous Detection of Relative Humidity and Temperature Based on Silicon On-Chip Cascaded Photonic Crystal Nanobeam Cavities

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1559
Author(s):  
Lun Ye ◽  
Xiao Liu ◽  
Danyang Pei ◽  
Jing Peng ◽  
Shuchang Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Relative Humidity ◽  
Simultaneous Detection ◽  
Silicon On Insulator ◽  
Wavelength Shift ◽  
External Interference ◽  
Lab On Chip ◽  
Resonant Modes ◽  
On Chip ◽  
Nanobeam Cavities

In this paper, we propose and numerically demonstrate a novel cascaded silicon-on-insulator (SOI) photonic crystal nanobeam cavity (PCNC) dual-parameter sensor for the simultaneous detection of relative humidity (RH) and temperature. The structure consists of two independent PCNCs supporting two different resonant modes: a dielectric-mode and an air-mode, respectively. The dielectric-mode nanobeam cavities (cav1) are covered with SU-8 cladding to increase the sensitivity ratio contrast between RH sensing and temperature sensing. The air-mode nanobeam cavities (cav2) are coated with a water-absorbing polyvinyl-alcohol (PVA) layer that converts the change in RH into a change in refractive index (RI) under different ambient RH levels, thereby inducing a wavelength shift. Due to the positive thermo-optic (TO) coefficient of silicon and the negative TO coefficient of SU-8 cladding, the wavelength responses take the form of a red shift for cav2 and a blue shift for cav1 as the ambient temperature increases. By using 3D finite-difference time-domain (3D-FDTD) simulations, we prove the feasibility of simultaneous sensing by monitoring a single output transmission spectrum and applying the sensor matrix. For cav1, the RH and temperature sensitivities are 0 pm/%RH and −37.9 pm/K, while those of cav2 are −389.2 pm/%RH and 58.6 pm/K. The sensitivity ratios of temperature and RH are −1.5 and 0, respectively, which is the reason for designing two different resonant modes and also implies great potential for realizing dual-parameter sensing detection. In particular, it is also noteworthy that we demonstrate the ability of the dual-parameter sensor to resist external interference by using the dual wavelength matrix method. The maximum RH and temperature detection errors caused by the deviation of resonance wavelength 1 pm are only 0.006% RH and 0.026 K, which indicates that it achieves an excellent anti-interference ability. Furthermore, the structure is very compact, occupying only 32 μm × 4 μm (length × width). Hence, the proposed sensor shows promising prospects for compact lab-on-chip integrated sensor arrays and sensing with multiple parameters.

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