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quantum physics > (some) Applications! > Flashcards

(some) Applications! Flashcards

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1
Q

Quantum Dots

A

small balls of metal or semi conductor. Particle in a Box phenomenon effects the energy states their electrons can inhabbbit. Allowing us to make it absorb/emit very specific waveleingths

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2
Q

small balls of metal or semi conductor. Particle in a Box phenomenon effects the energy states their electrons can inhabbbit. Allowing us to make it absorb/emit very specific waveleingths

A

Quantum Dots

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3
Q

properties of lasers

A

The light is choerent and monocrhromatic (they are all of the same color, and their peaks all line up)

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4
Q

The light is choerent and monocrhromatic (they are all of the same color, and their peaks all line up)

A

properties of lasers

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5
Q

absorbtion of light

A

when a photon of the right energy interacts with a material, the material will absorb the light and the electron will be promoted in energy

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6
Q

when a photon of the right energy interacts with a material, the material will absorb the light and the electron will be promoted in energy

A

absorbtion of light

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7
Q

spontaneious emision/photoemission/flouressence

A

a particle relaxes in energy, causing it to release a photon

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8
Q

a particle relaxes in energy, causing it to release a photon

A

spontaneious emision/photoemission/flouressence

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9
Q

Stimulated emission

A

a particle at a high energy is stimulated to drop in energy when exposed to a phonon equaling the drop, creating a second identical phton

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10
Q

a particle at a high energy is stimulated to drop in energy when exposed to a phonon equaling the drop, creating a second identical phton

A

Stimulated emission

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11
Q

Exciton

A

a psudo-partical formed when an excited electron is attracted to a (hole) with a postiive charge. The other electrons tin the moledcute keep it from colaping, alowing the electron’s wavefunction to fill the availible space

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12
Q

a psudo-partical formed when an excited electron is attracted to a (hole) with a postiive charge. The other electrons tin the moledcute keep it from colaping, alowing the electron’s wavefunction to fill the availible space

A

Exciton

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13
Q

L.A.S.E.R.

A

Light Amplificationg by Stimulated Emission of Radiation

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14
Q

Light Amplificationg by Stimulated Emission of Radiation

A

L.A.S.E.R.

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15
Q

Gain medium

A

the portion of a laser that is providing the stimulated emisssion

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16
Q

the portion of a laser that is providing the stimulated emisssion

A

Gain medium

17
Q

the Pump

A

the part of the lazer that puts electrons of the gain medium into the excited state

18
Q

the part of the lazer that puts electrons of the gain medium into the excited state

A

the Pump

19
Q

mirrors inside a lazer

A

build up more and more coordinated light inside the chamber by passing it over the gain medium over and over, only let a small amount of light out

20
Q

build up more and more coordinated light inside the chamber by passing it over the gain medium over and over, only let a small amount of light out

A

mirrors inside a laser

21
Q

when a lazer is turned on

A

the pump activates, and eventualy one electron in the gain medium will spontaniously decay, starting a chain reaction

22
Q

the pump activates, and eventualy one electron in the gain medium will spontaniously decay, starting a chain reaction

A

when a lazer is turned on

23
Q

Population inversion

A

When more than 50% of the population is in an excited state, requires at least 3 states of energy to set up properly.

24
Q

When more than 50% of the population is in an excited state, requires at least 3 states of energy to set up properly.

A

Population inversion

25
Q

building quantum wells

A

we construct a shape that is essentialy unlimited in two dimetnions, but very limited in the third. even more specific than quantum dots.

26
Q

we construct a shape that is essentialy unlimited in two dimetnions, but very limited in the third. even more specific than quantum dots.

A

building quantum wells

27
Q

Resonance Tunneling diode

A

a diode with multiple wells, when a bias is just right the boxes will line up, creating an electron flow.

28
Q

a diode with multiple wells, when a bias is just right the boxes will line up, creating an electron flow.

A

Resonance Tunneling Diode

29
Q

Scanning Tunneling Microscopy (STM)

A

you have a point of platinum over a metalic surface such that electrons will be able to tunnel through. You can take “pictures” of attoms by measuring the flow of electrons (thereby measuring if anything is in the way)

30
Q

you have a point of platinum over a metalic surface such that electrons will be able to tunnel through. You can take “pictures” of attoms by measuring the flow of electrons (thereby measuring if anything is in the way)

A

Scanning Tunneling Microscopy (STM)

31
Q

valence bonds and quantum mechanics

A

electrons are essentialy particles in a box, if they have enough energy their function exteds outside the box, and if another box is close enough, they may jump between boxes.

32
Q

electrons are essentialy particles in a box, if they have enough energy their function exteds outside the box, and if another box is close enough, they may jump between boxes.

A

valence bonds and quantum mechanics

33
Q

Chemical reactions and quantum mechanics

A

when the raction inovolves a small particle, such as a hydrogen or electron, it may tunnel through the potential barriar to create products, even if there isn’t enough energy for the reaction to proceed normaly

34
Q

when the raction inovolves a small particle, such as a hydrogen or electron, it may tunnel through the potential barriar to create products, even if there isn’t enough energy for the reaction to proceed normaly

A

Chemical reactions and quantum mechanics

quantum physics (10 decks)

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