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Major Components of the Light Microscope

Major Components of the Light Microscope

Published on: July 30, 2008

Light Stops at Exceptional Points.

Tamar Goldzak¹, Alexei A Mailybaev², Nimrod Moiseyev¹

¹Schulich Faculty of Chemistry and Faculty of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel.

Physical Review Letters

|January 20, 2018

Summary

This summary is machine-generated.

Researchers demonstrate stopped light in parity-time (PT) symmetric systems by tuning coupled waveguides to an exceptional point, achieving zero group speed for optical pulses.

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Area of Science:

Quantum optics
Condensed matter physics
Non-Hermitian photonics

Background:

Light has been slowed to near-zero speeds in ultracold atoms and photonic crystals.
Previous methods involved atomic ensembles or photonic band edges.
Stopped light enables light pulse storage and retrieval.

Purpose of the Study:

To extend the phenomenon of stopped light to parity-time (PT) symmetric systems.
To demonstrate zero group speed in PT symmetric optical waveguides.
To explore tuning capabilities for optical pulses in PT symmetric systems.

Main Methods:

Utilizing parity-time (PT) symmetric optical waveguides.
Preparing the system at an exceptional point where optical modes coalesce.
Demonstrating the effect in coupled waveguides with engineered gain and loss.

Main Results:

Achieved zero group speed in PT symmetric optical waveguides.
Showcased tunability for optical pulses across a wide range of frequencies and bandwidths.
Confirmed the phenomenon at an exceptional point in the PT symmetric system.

Conclusions:

Stopped light is achievable in PT symmetric systems.
Exceptional points in PT symmetric systems provide a new route to control light speed.
This work opens possibilities for novel optical devices and quantum information processing.