Optical Technology

Optical technology harnesses the properties of light—its coherence, intensity and phase—to develop devices and systems for sensing, imaging, communication and navigation. Recent advances in integrated photonics, microfabrication and novel materials have transformed bulky laboratory instruments into chip-scale platforms, enabling high-performance optical gyroscopes, wavefront sensors, chemical and biological detectors, and compact spectroscopic imagers. Silicon-on-insulator (SOI) and thin-film platforms now support monolithic integration of light sources, modulators and detectors, driving down size, weight, power consumption and cost. Concurrently, innovations in nonlinear optics and supramolecular assembly have yielded sensitive, multiplexed chemical sensors that exploit fluorescence modulation and pattern recognition. Together, these developments are extending the reach of precision optical tools into consumer electronics, autonomous vehicles, environmental monitoring, minimally invasive diagnostics and next-generation telescopes.

Research from Nature Portfolio

Studies have demonstrated a miniature interferometric optical gyroscope fabricated on an SOI platform. Coiled multimode waveguides and engineered crossings confine the sensing arm within a sub-millimetre footprint while delivering rotation sensitivities on par with inertial-grade devices. This work lays the foundation for mass-producible, monolithic gyroscopes in consumer and unmanned systems. A novel wide-field wavefront sensor operating at 30 Hz over a 1 100 arcsec field has been realised using light-field techniques. This sensor resolves multiple turbulent layers up to 750 m altitude and supports machine-learning-driven turbulence prediction, offering a pathway to real-time adaptive-optics correction in free-space links and ground-based telescopes. In parallel, a supramolecular approach has been introduced to construct large libraries of differential sensing arrays from minimal building blocks. By varying host–guest combinations and environmental conditions, dozens of sensor units are generated from a handful of components, achieving high-accuracy discrimination of protein biomarkers and complex food matrices without extensive synthesis.

Research from all publishers

An on-chip spectrometer for spectral-domain optical coherence tomography has been realised in a CMOS-compatible photonic integrated circuit. A 512-channel arrayed waveguide grating co-integrated with on-chip photodiodes achieves 70 % coupling efficiency, 92 dB sensitivity at 55 kHz and has enabled three-dimensional in vivo imaging of biological tissues, marking a major step towards portable diagnostic devices. Advances in quantum photonic gyroscopes have exploited thin-film χ(2) resonators to maximize Fisher information via Bayesian optimisation. The resulting sensor exhibits a nearly 470× improvement in rotation sensitivity over the shot-noise limit within the same footprint. Finally, a new class of pattern-generating fluorescent probes—so-called ID-probes—combines small-molecule sensor motifs with array-based discrimination. These probes generate unique optical fingerprints for proteins and small molecules, operate within living cells and biofluids, and support applications ranging from medical diagnostics to molecular cryptography.

Optical Technology publication trend

The graph below shows the total number of articles in optical technology across all publications each year (not limited to Nature Index journals).

Technical terms

Sagnac effect: Phase difference induced between counter-propagating light beams in a rotating frame, forming the basis of optical gyroscope operation.

Photonic integrated circuit (PIC): A semiconductor chip combining multiple optical functions—waveguides, gratings, modulators and detectors—into a monolithic platform.

Arrayed waveguide grating (AWG): A wavelength-demultiplexing device made from waveguides of incrementally varied lengths, used for spectral separation in integrated spectrometers.

Wavefront sensor: An instrument that measures phase distortions across an optical beam to diagnose and correct aberrations.

Fisher information: A statistical measure of the maximum sensitivity a sensor can attain under given noise conditions, used to optimise quantum-limited devices.

Differential sensing: Approach employing cross-reactive sensor arrays whose collective response patterns are analysed to discriminate complex mixtures.

References

1. Silicon Integrated Interferometric Optical Gyroscope. Scientific Reports (2018).
2. Direct observation of atmospheric turbulence with a video-rate wide-field wavefront sensor. Nature Photonics (2024).
3. A facile way to construct sensor array library via supramolecular chemistry for discriminating complex systems. Nature Communications (2022).
4. CMOS optoelectronic spectrometer based on photonic integrated circuit for in vivo 3D optical coherence tomography. PhotoniX (2024).
5. Bayesian optimization of Fisher Information in nonlinear multiresonant quantum photonics gyroscopes. Nanophotonics (2024).
6. Molecules that Generate Fingerprints: A New Class of Fluorescent Sensors for Chemical Biology, Medical Diagnosis, and Cryptography. Accounts of Chemical Research (2023).
7. The commercialization of silicon photonics. Nature Photonics (2014).