English for Masters. Маркушевская Л.П - 20 стр.

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Университет ИТМО | Санкт-Петербург

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20
proper energy, emits a second photon with the same phase, frequency, polarization,
and direction of travel as the original.
2. a) In order to show the single molecule optical transistor at work we need a laser.
b) In order to show the single molecule optical transistor at work, two laser sources
are needed.
3. a) The first laser pumps the electrons of the molecule in an appropriate energy
state; a second laser sources then stimulates the secondary emission of photons from
the molecule.
b) The first laser pumps the electrons of the molecule in an appropriate energy state;
these electrons stimulate the secondary emission of photons from the molecule.
4. a) In these terms, the first laser works like the control current in a transistor. It can,
therefore, decide when to open or to close the molecular gate, i.e. when the molecule
only absorbs the photons of the second laser or when it emits more by stimulated
emission.
b) In these terms, the second laser works like the control current in a transistor. It can,
therefore, decide when to open or to close the molecular gate, i.e. when the molecule
only absorbs the photons of the second laser or when it emits more by stimulated
emission.
5. a) It can, therefore, decide when to open or to close the molecular gate, i.e. when
the molecule only absorbs the photons of the second laser or when it emits more by
stimulated emission.
b) It can, therefore, decide when to block the molecular gate, i.e. when the molecule
only absorbs the photons of the second laser or when it emits more by stimulated
emission.
Task 2. Explain in your own words “molecular transistor operation”.
Task 3. Find synonyms for the following nouns:
State, result, system, circuit, application.

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