pc5271AY2526wiki - User contributions [en]

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:18:59Z

Ziyang:

==Team Members==
Wang Peikun E1538091@u.nus.edu

Zhu Ziyang E1583446@u.nus.edu

Yuan Si-Yu E1353381@u.nus.edu

==Introduction==
We are building two coupled oscillating circuits: one that naturally loses energy (lossy) and one that gains energy (active) using a specific amplifier that saturates at high amplitudes. When tuning these two circuits to a nonlinear Exceptional Point (NEP), the system becomes extremely sensitive to small perturbations in inductance, following a steep cubic-root response curve, while remaining resistant to noise.

==Setups==

==Measurements==

==Results and Analysis==

==References==
[1] K. Bai, T.-R. Liu, L. Fang, J.-Z. Li, C. Lin, D. Wan, and M. Xiao, Observation of nonlinear exceptional points with a complete basis in dynamics, Phys. Rev. Lett. 132, 073802 (2024).

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:16:59Z

Ziyang: /* Measurements */

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:15:52Z

Ziyang: /* Introduction */

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:15:15Z

Ziyang: /* Introduction */

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:13:55Z

Ziyang: /* Team Members= */

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:13:23Z

Ziyang: /* Introduction */

==Team Members===
Wang Peikun E1538091@u.nus.edu,
Zhu Ziyang E1583446@u.nus.edu,

Yuan Si-Yu E1353381@u.nus.edu

==Introduction==
We are building two coupled oscillating circuits: one that naturally loses energy (lossy) and one that gains energy (active) using a specific amplifier that saturates at high amplitudes. When tuning these two circuits to a nonlinear Exceptional Point (NEP), the system becomes extremely sensitive to small perturbations in inductance, following a steep cubic-root response curve, while remaining resistant to noise.

===Setups===

===Measurements===

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:11:44Z

Ziyang: /* Introduction */

==Introduction==
We are building two coupled oscillating circuits: one that naturally loses energy (lossy) and one that gains energy (active) using a specific amplifier that saturates at high amplitudes. When tuning these two circuits to a nonlinear Exceptional Point (NEP), the system becomes extremely sensitive to small perturbations in inductance, following a steep cubic-root response curve, while remaining resistant to noise.

===[[Team Members]]===

Zhu Ziyang E1583446@u.nus.edu,

Yuan Si-Yu E1353381@u.nus.edu

===[[Setups]]===

===[[Measurements]]===

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:11:23Z

Ziyang: /* Introduction */

==[[Introduction]]==
We are building two coupled oscillating circuits: one that naturally loses energy (lossy) and one that gains energy (active) using a specific amplifier that saturates at high amplitudes. When tuning these two circuits to a nonlinear Exceptional Point (NEP), the system becomes extremely sensitive to small perturbations in inductance, following a steep cubic-root response curve, while remaining resistant to noise.

===[[Team Members]]===

Zhu Ziyang E1583446@u.nus.edu,

Yuan Si-Yu E1353381@u.nus.edu

===[[Setups]]===

===[[Measurements]]===

Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point

2026-01-27T05:08:29Z

Ziyang: /* Team Members */

==[[Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point]]==
We are building two coupled oscillating circuits: one that naturally loses energy (lossy) and one that gains energy (active) using a specific amplifier that saturates at high amplitudes. When tuning these two circuits to a nonlinear Exceptional Point (NEP), the system becomes extremely sensitive to small perturbations in inductance, following a steep cubic-root response curve, while remaining resistant to noise.

===[[Team Members]]===

Zhu Ziyang E1583446@u.nus.edu

===[[Setups]]===

===[[Measurements]]===

Main Page

2026-01-27T05:07:36Z

Ziyang: /* Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point */

'''Welcome to the wiki page for the course PC5271: Physics of Sensors "(in AY25/26 Sem 2)!'''

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Our '''location is S11-02-04''', time slots for "classes" are '''Tue and Fri 10:00am-12:00noon'''.

==Projects==
===[[Project 1 (Example)]]===
Keep a very brief description of a project or even a suggestion here, and perhaps the names of the team members, or who to contact if there is interest to join. Once the project has stabilized, keep stuff in the project page linked by the headline.

===[[Inductor Sensors of Ultra-high Sensitivity Based on Nonlinear Exceptional Point]]===
Team members: Yuan Siyu; Zhu Ziyang;

We are building two coupled oscillating circuits: one that naturally loses energy (lossy) and one that gains energy (active) using a specific amplifier that saturates at high amplitudes. When tuning these two circuits to a nonlinear Exceptional Point (NEP), the system becomes extremely sensitive to small perturbations in inductance, following a steep cubic-root response curve, while remaining resistant to noise.

==Resources==
===Books and links===
* A good textbook on the Physics of Sensors is Jacob Fraden: Handbook of Mondern Sensors, Springer, ISBN 978-3-319-19302-1 or [https://link.springer.com/book/10.1007/978-3-319-19303-8 doi:10.1007/978-3-319-19303-8]. There shoud be an e-book available through the NUS library at https://linc.nus.edu.sg/record=b3554643
* Another good textbook: John B.Bentley: Principles of Measurement Systems, 4th Edition, Pearson, ISBN: 0-13-043028-5 or https://linc.nus.edu.sg/record=b2458243 in our library.

===Software===
* Various Python extensions. [https://www.python.org Python] is a very powerful free programming language that runs on just about any computer platform. It is open source and completely free.
* [https://www.gnuplot.info Gnuplot]: A free and very mature data display tool that works on just about any platform used that produces excellent publication-grade eps and pdf figures. Can be also used in scripts. Open source and completely free.
* Matlab: Very common, good toolset also for formal mathematics, good graphics. Expensive. We may have a site license, but I am not sure how painful it is for us to get a license for this course. Ask if interested.
* Mathematica: More common among theroetical physicists, very good in formal maths, now with better numerics. Graphs are ok but can be a pain to make looking good. As with Matlab, we do have a campus license. Ask if interested.

===Apps===
Common mobile phones these days are equipped with an amazing toolchest of sensors. There are a few apps that allow you to access them directly, and turn your phone into a powerful sensor. Here some suggestions:

* Physics Toolbox sensor suite on [https://play.google.com/store/apps/details?id=com.chrystianvieyra.physicstoolboxsuite&hl=en_SG Google play store] or [https://apps.apple.com/us/app/physics-toolbox-sensor-suite/id1128914250 Apple App store].

===Data sheets===
A number of components might be useful for several groups. Some common data sheets are here:
* Photodiodes:
** Generic Silicon pin Photodiode type [[Media:Bpw34.pdf|BPW34]]
** Fast photodiodes (Silicon PIN, small area): [[Media:S5971_etc_kpin1025e.pdf|S5971/S5972/S5973]]
* PT 100 Temperature sensors based on platinum wire: [[Media:PT100_TABLA_R_T.pdf|Calibration table]]
* Thermistor type [[Media:Thermistor B57861S.pdf|B57861S]] (R0=10kΩ, B=3988Kelvin). Search for [https://en.wikipedia.org/wiki/Steinhart-Hart_equation Steinhart-Hart equation]. See [[Thermistor]] page here as well.
* Humidity sensor
** Sensirion device the reference unit: [[media:Sensirion SHT30-DIS.pdf|SHT30/31]]
* Thermopile detectors:
** [[Media:Thermopile_G-TPCO-035 TS418-1N426.pdf|G-TPCO-035 / TS418-1N426]]: Thermopile detector with a built-in optical bandpass filter for light around 4μm wavelength for CO2 absorption
* Resistor color codes are explained [https://en.wikipedia.org/wiki/Electronic_color_code here]

** Fluxgate magnetometer [[media:Data-sheet FLC-100.pdf|FCL100]]
* Lasers
** Red laser diode [[media:HL6501MG.pdf|HL6501MG]]
* Generic amplifiers
** Instrumentation amplifiers: [[media:Ad8221.pdf|AD8221]] or [[media:AD8226.pdf|AD8226]]
** Conventional operational amplifiers: Precision: [[media:OP27.pdf|OP27]], General purpose: [[media:OP07.pdf|OP07]]
** Transimpedance amplifiers for photodetectors: [[media:AD8015.pdf|AD8015]]

==Some wiki reference materials==
* [https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:FAQ MediaWiki FAQ]
* [[Writing mathematical expressions]]
* [[Uploading images and files]]

==Old wikis==
You can find entries to the wiki from [https://pc5271.org/PC5271_AY2425S2 AY2024/25 Sem 2] and [https://pc5271.org/PC5271_AY2324S2 AY2023/24 Sem 2].