USA As Represented by Secretary of the Navy

Kenan P Fears

Manoj K Kolel-Veetil

Jeffrey C Owrutsky

Jeremy J Pietron

Adam Dunkelberger

Blake Simpkins

An apparatus including an optical resonator, and a method of using same. The optical limiter includes an optically absorbent material. The optical resonator supports a plurality of resonant transmission peaks at resonant frequencies defined by the cavity length. The optically absorbent material exhibits a saturable absorption response at a fundamental absorption peak located spectrally at a fundamental absorption peak frequency of the plurality of resonant transmission peaks. The optically absorbent material includes an absorptivity sufficient for strong cavity coupling, such that the fundamental absorption peak splits into a first upper vibration polariton transmission peak and a second lower polariton transmission peak separated by a Rabi splitting. The Rabi splitting is proportional to a square root of the absorptivity. The absorptivity varies with optical excitation of the optically absorbent material. The absorptivity is maximized at a photon-unsaturated ground state, and the absorptivity is minimized at an optically excited state.

Intrinsic and tunable self-modulating optical limiter via strong cavity coupling

Disclosed herein is a cyclic peptide polymer. R, R, and Rare organic groups. Each Ris a covalent bond, methylene, ethylene, n-propylene, or n-butylene. Each X is &#x2014;NH&#x2014;, &#x2014;O&#x2014;, or &#x2014;O&#x2014;CO&#x2014;. The values m and n are nonnegative integers having a sum of at least 1. The value p is an integer greater than 1. The cyclic peptide polymer may be made by providing a first cyclic peptide monomer having a protecting group on the X group, covalently binding the &#x2014;CO&#x2014;OH group of the first cyclic peptide monomer to a solid support having a carboxylic acid-reactive group, converting the protecting group to &#x2014;XH, reacting the &#x2014;XH group with the &#x2014;CO&#x2014;OH group of an additional cyclic peptide monomer, optionally repeating the converting and reacting steps with further additional cyclic peptide monomers, and cleaving the cyclic peptide polymer from the solid support. 

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Alexandria, VA, United States of America

Kenan P Fears